I-beam connecting rod section parameter determination method and device, electronic equipment and medium

Abstract

The application relates to the technical field of I-beam connecting rods, in particular to an I-beam connecting rod section parameter determination method and device, electronic equipment and a medium. The method comprises the following steps: obtaining an initial parameter group corresponding to a cross section of a shaft body in a target I-beam connecting rod; based on the initial parameter group, relying on a preset mathematical formula, calculating an initial mass reduction and an initial safety factor corresponding to the target I-beam connecting rod; updating the initial parameter group based on the initial mass reduction and the initial safety factor to obtain a plurality of updated parameter groups corresponding to the target I-beam connecting rod; verifying each updated parameter group and updating each updated parameter group based on the verification result to obtain a standby parameter group; and determining the standby parameter group as a final parameter group corresponding to the cross section of the shaft body in the target I-beam connecting rod. The optimization closed loop of the entire cross section of the shaft body is completed, the accuracy of the determined I-beam connecting rod section parameter is ensured, and the engineering practicability of the target I-beam connecting rod is ensured.

Description

Technical Field

[0001] This invention relates to the field of I-beam connecting rod technology, specifically to methods, devices, electronic equipment, and media for determining the cross-sectional parameters of I-beam connecting rods. Background Technology

[0002] As automotive engines upgrade towards hybrid and range-extended systems, the requirements for energy conservation, emission reduction, and lightweighting of the entire vehicle become increasingly stringent. Simultaneously, the application of technologies such as lean combustion and long stroke in engines leads to increased cylinder pressure and connecting rod length, significantly deteriorating the operating environment of the connecting rods and greatly increasing the difficulty of balancing lightweighting and reliability. With limited margin for weight reduction in the connecting rod's large and small ends, the connecting rod body, as a weight-sensitive area, has its I-beam structural dimensions and cross-sectional area becoming the core of lightweight design. It is necessary to maximize weight reduction through optimization while avoiding fatigue and durability damage caused by excessive lightweighting. Therefore, accurately determining the parameter set corresponding to the cross-section of the I-beam connecting rod body is a crucial prerequisite for balancing connecting rod lightweighting and reliability, and adapting to the complex operating conditions of hybrid / range-extended engines.

[0003] Existing technologies typically optimize the connection by establishing an equivalent simplified model of the link and combining it with strength simulation. However, the simplified model is prone to errors in stiffness and mass matrix, which affects the calculation accuracy and thus the determined cross-sectional parameters of the I-beam link are inaccurate, thereby affecting the practicality of the project.

[0004] Therefore, ensuring the accuracy of the determined cross-sectional parameters of the I-beam connecting rods, and thus guaranteeing the practicality of the project, has become an urgent problem to be solved. Summary of the Invention

[0005] This invention provides a method, apparatus, electronic device, and medium for determining the cross-sectional parameters of I-beam connecting rods, in order to solve the problem of how to ensure the accuracy of the determined cross-sectional parameters of I-beam connecting rods, thereby ensuring the practicality of engineering applications.

[0006] In a first aspect, the present invention provides a method for determining the cross-sectional parameters of an I-beam connecting member. The method includes: obtaining an initial parameter set corresponding to the cross-section of the member in the target I-beam connecting member; the initial parameter set includes multiple initial parameters; based on the initial parameter set and relying on a preset mathematical formula, calculating the initial mass reduction and initial safety factor corresponding to the target I-beam connecting member; the mathematical formula includes at least one of a cross-sectional area calculation formula, a mass calculation formula, a stress calculation formula, and a safety factor derivation formula; updating the initial parameter set based on the initial mass reduction and the initial safety factor to obtain multiple updated parameter sets corresponding to the target I-beam connecting member; verifying each updated parameter set and updating each updated parameter set based on the verification results to obtain a spare parameter set; and determining the spare parameter set as the final parameter set corresponding to the cross-section of the member in the target I-beam connecting member.

[0007] The method for determining the cross-sectional parameters of an I-beam connecting member provided in this application obtains an initial parameter set corresponding to the cross-section of the target I-beam connecting member. It clarifies the initial geometric parameter benchmarks for the I-beam connecting member's cross-section design, providing fundamental data support for all subsequent performance calculations and parameter optimizations, defining the initial range for parameter optimization, and ensuring that subsequent processes have clearly defined calculation and adjustment targets. Based on the initial parameter set, and relying on preset mathematical formulas, it calculates the initial mass reduction and initial safety factor corresponding to the target I-beam connecting member; the mathematical formulas include at least one of the following: cross-sectional area calculation formula, mass calculation formula, stress calculation formula, and safety factor derivation formula. It achieves a quantitative evaluation of the dual objectives of lightweighting and strength in the initial parameter set, obtaining initial benchmark values ​​for the two core objectives, providing a comparative reference for subsequent parameter updates and optimizations, and clarifying the optimization direction for parameter adjustments (increasing mass reduction and ensuring the safety factor meets standards). Based on the initial mass reduction and initial safety factor, the initial parameter set is updated to obtain multiple updated parameter sets corresponding to the target I-beam connecting member. Starting from the initial parameter set, multiple candidate parameter schemes are iteratively generated around the dual objectives of lightweighting and strength. This avoids the limitations of a single parameter combination, provides sufficient optimization samples for subsequent verification and screening, and achieves the core transition from "initial parameters" to "optimized candidate parameters." Each updated parameter set is verified, and based on the verification results, each updated parameter set is updated to obtain a backup parameter set. Updated parameter sets that fail to meet strength or lightweighting requirements are eliminated through verification. The compliant parameter sets are further refined and adjusted, and backup parameter sets that meet the basic requirements of the dual objectives are screened and optimized. This completes the initial screening and optimization of parameters, laying a reliable foundation for the final parameter determination and preventing invalid parameter sets from entering the final stage. The backup parameter set is determined as the final parameter set corresponding to the cross-section of the target I-beam connecting rod. By identifying the optimal parameter set that meets the core design requirements of "maximizing lightweighting and achieving strength standards," the optimization loop of the entire bar cross-sectional parameters is completed. This provides a unique and reliable basis for the subsequent modeling, manufacturing, and application of the target I-beam connecting rod, ensuring the accuracy of the determined I-beam connecting rod cross-sectional parameters and thus guaranteeing the engineering practicality of the target I-beam connecting rod.

[0008] In one optional implementation, based on the initialization parameter set and relying on a preset mathematical formula, the initial mass reduction and initial safety factor corresponding to the target I-beam connecting rod are calculated, including: based on the initialization parameter set, calculating the initial cross-sectional area of ​​the target I-beam connecting rod; and based on the initial cross-sectional area of ​​the rod, calculating the initial mass reduction and initial safety factor.

[0009] The method for determining the cross-sectional parameters of an I-beam connecting rod provided in this application calculates the initial cross-sectional area of ​​the target I-beam connecting rod based on an initialization parameter set. It transforms the abstract initialization parameter set (such as total cross-sectional height, plate thickness, fillet radius, and other geometric parameters) into a quantifiable core geometric indicator (the cross-sectional area of ​​the connecting rod), solving the problem that the parameter set cannot be directly used for subsequent performance calculations. This cross-sectional area is a crucial bridge connecting "cross-sectional geometric parameters" with "mass and strength," providing a core geometric basis for subsequent calculations of mass reduction and safety factors, ensuring the accuracy and traceability of performance calculations. Based on the initial cross-sectional area of ​​the connecting rod, the initial mass reduction and initial safety factor are calculated. This achieves the transformation from "geometric area" to "lightweight indicator," intuitively reflecting the initial lightweight effect of the connecting rod under the initialization parameter set, and defining a lightweight benchmark for subsequent parameter optimization. Based on the cross-sectional area, mechanical parameters such as moment of inertia and stress are derived, ultimately quantifying the strength performance of the connecting rod and clarifying the strength baseline of the initialization parameter set.

[0010] In one optional implementation, the initial cross-sectional area of ​​the target I-beam connecting rod is calculated based on the initialization parameter set, including: dividing the initial cross-sectional area of ​​the rod into multiple sub-cross-sectional area regions based on the initialization parameter set; and calculating the initial cross-sectional area of ​​the target I-beam connecting rod based on each sub-cross-sectional area region.

[0011] The method for determining the cross-sectional parameters of an I-beam connecting member provided in this application, based on an initialization parameter set, divides the initial cross-sectional area of ​​the member into multiple sub-cross-sectional area regions. This method decomposes the irregular and complex cross-section of the I-beam connecting member into regular sub-regions that can be calculated using basic geometric formulas, simplifying the problem of directly and accurately calculating the area of ​​complex cross-sections. The decomposition process, based on the initialization parameters, ensures that the geometric boundaries of each sub-region precisely correspond to the initial parameters, guaranteeing the traceability and accuracy of subsequent area calculations and laying the foundation for overall cross-sectional area calculation. Based on each sub-cross-sectional area region, the initial cross-sectional area of ​​the target I-beam connecting member is calculated. By calculating the area of ​​each regular sub-region separately and then summing the results, the accurate solution for the complex cross-sectional area of ​​the member is achieved, yielding an initial cross-sectional area that perfectly matches the initialization parameter set. This result provides a core and accurate geometric quantitative basis for the subsequent derivation of the initial mass reduction and the initial safety factor, ensuring the reliability of the basic data for subsequent performance index calculations. It is a crucial link connecting the cross-sectional geometric parameters and the member's performance indicators.

[0012] In one optional implementation, the initial pole cross-sectional area includes multiple sub-cross-sectional area regions; the initial safety factor is calculated based on the initial pole cross-sectional area, including: calculating the sub-moment of inertia corresponding to each sub-cross-sectional area region; calculating the total moment of inertia corresponding to the initial pole cross-sectional area based on each sub-moment of inertia; and calculating the initial safety factor based on the total moment of inertia.

[0013] The method for determining the cross-sectional parameters of an I-beam connecting rod provided in this application calculates the sub-moments of inertia corresponding to each sub-cross-sectional area. It decomposes the calculation of the moment of inertia of a complex cross-section into the calculation of the moment of inertia of regular sub-regions, simplifying the solution and avoiding errors from directly calculating the moment of inertia of irregular cross-sections. The sub-moments of inertia are calculated on a unit basis according to the decomposed regular regions, precisely corresponding to the initial parameters, providing traceable and high-precision basic data for the total moment of inertia, ensuring the accuracy of subsequent mechanical calculations. Based on each sub-moment of inertia, the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod is calculated. Based on the principle of superposition of moments of inertia in combined graphics, the sub-moments of inertia are summarized to obtain the overall total moment of inertia, scientifically restoring the actual bending stiffness characteristics of the rod cross-section. The total moment of inertia, as a core mechanical parameter characterizing the cross-sectional deformation resistance, provides a key basis for subsequent safety factor calculations and is an important bridge connecting the cross-sectional geometric parameters and the strength index of the connecting rod. Based on the total moment of inertia, the initial safety factor is calculated. A correlation was established between the cross-sectional mechanical parameters (total moment of inertia) and the strength quantification index (initial safety factor), realizing the transformation from geometric mechanical properties to strength performance; the initial strength performance of the connecting rod under the initial parameter set was accurately quantified, and the core strength judgment benchmark was obtained, providing a clear strength reference for subsequent parameter optimization and updating, ensuring that the optimization process always takes the strength standard as the bottom line.

[0014] In one optional implementation, the initial safety factor is calculated based on the total moment of inertia, including: calculating the compressive stress in the swing plane and the compressive stress in the vertical swing plane corresponding to the target I-beam link based on the total moment of inertia; calculating the safety factor in the swing plane corresponding to the target I-beam link based on the compressive stress in the swing plane; calculating the safety factor in the vertical swing plane corresponding to the target I-beam link based on the compressive stress in the vertical swing plane; and calculating the initial safety factor based on the safety factors in the swing plane and the safety factor in the vertical swing plane.

[0015] The method for determining the cross-sectional parameters of an I-beam connecting rod provided in this application calculates the compressive stress in the swing plane and the vertical swing plane corresponding to the target I-beam connecting rod based on the total moment of inertia. The total moment of inertia, characterizing the bending stiffness of the cross-section, is transformed into the actual stress value of the core load-bearing surface of the connecting rod. This closely matches the actual working condition of the connecting rod under multi-plane compression during operation, accurately quantifying the degree of compressive deformation in both the swing and vertical swing planes. This provides a direct and crucial stress quantification basis for safety factor calculation, making strength assessment more aligned with engineering practice. Based on the compressive stress in the swing plane, the safety factor in the swing plane corresponding to the target I-beam connecting rod is calculated. Targeted quantification of the strength redundancy of the main load-bearing surfaces of the connecting rod, clarifying the strength compliance status of the core load-bearing surfaces, is a key step in assessing the strength of the connecting rod foundation. This defines a core reference dimension for strength determination, avoiding the failure risk caused by insufficient strength of the main load-bearing surfaces. Based on the compressive stress in the vertical swing plane, the safety factor in the vertical swing plane corresponding to the target I-beam connecting rod is calculated. This method supplements the strength performance of secondary load-bearing surfaces of the connecting rod, overcoming the limitations of single-plane strength assessment. It achieves full-dimensional coverage of the connecting rod's load-bearing strength, making strength assessment more comprehensive and rigorous, and avoiding overall structural problems caused by weaknesses in secondary load-bearing surfaces. An initial safety factor is calculated based on safety factors in both the swing plane and the vertical swing plane. By integrating dual-plane strength indices, an initial safety factor that comprehensively characterizes the overall strength of the connecting rod is obtained, forming a unified and intuitive strength judgment benchmark. This provides a clear strength reference standard for subsequent parameter updates and optimizations, ensuring that subsequent parameter adjustments always prioritize overall strength compliance.

[0016] In one optional implementation, the initialization parameter set is updated based on the initial mass reduction and the initial safety factor to obtain multiple updated parameter sets corresponding to the target I-beam link. This includes: calculating the mass reduction contribution of each initialization parameter in the initialization parameter set to the initial mass reduction and the safety factor contribution of each initialization parameter to the initial safety factor; selecting at least one initialization parameter whose mass reduction contribution is greater than a preset contribution threshold and / or whose safety factor contribution is greater than a preset contribution threshold as an updatable core parameter; updating the initialization parameter set based on each updatable core parameter to obtain multiple updated parameter sets corresponding to the target I-beam link; each updated parameter set includes multiple updated parameters.

[0017] The method for determining the cross-sectional parameters of the I-beam connecting member provided in this application calculates the contribution of each initialization parameter in the initial parameter group to the initial mass reduction and the contribution of each initialization parameter to the initial safety factor. It quantifies the impact of each parameter on the dual objectives of lightweighting and strength, clarifies the correlation weight between parameters and core objectives, and distinguishes the direction of parameter effects, solving the problem of "which parameters have a significant impact on the optimization objectives," providing a data-driven basis for subsequent parameter selection and avoiding blind optimization of all parameters. At least one initialization parameter whose contribution to mass reduction is greater than a preset contribution threshold and / or whose contribution to the safety factor is greater than a preset contribution threshold is selected as an updatable core parameter. By using thresholds to "focus on the major and exclude the minor," the core parameters that are critical to the dual objectives are selected, locking in the optimization focus and excluding parameters with low contribution or no significant impact, reducing the computational load of subsequent parameter updates and improving optimization efficiency; it also avoids processing feasibility issues caused by adjusting low-contribution process parameters, ensuring the engineering practicality of the optimization. Based on each updatable core parameter, the initial parameter group is updated to obtain multiple updated parameter groups corresponding to the target I-beam connecting member; each updated parameter group includes multiple updated parameters. Adjusting the values ​​of core parameters without changing the initial values ​​of low-contribution parameters ensures the accuracy of the optimization direction and generates multiple sets of different parameter combinations, providing sufficient candidate samples for subsequent verification and screening. Multiple sets of updated parameters also allow for greater selection in subsequent optimization, making it easier to find the optimal solution that balances lightweightness and strength.

[0018] In one optional implementation, each update parameter group is verified, and based on the verification results, each update parameter group is updated to obtain a backup parameter group, including: calculating the update quality reduction amount and update safety factor corresponding to each update parameter group; detecting whether the update safety factor corresponding to each update parameter group meets a preset safety factor threshold; if the update safety factor meets the preset safety factor threshold, then the update parameter group is used as a candidate parameter group; and adjusting each candidate parameter group to obtain a backup parameter group.

[0019] The method for determining the cross-sectional parameters of I-beam connecting members provided in this application calculates the reduction in updated mass and the updated safety factor corresponding to each updated parameter group. Lightweighting and strength indices are quantified for each group of candidate parameters to obtain comparable optimization effects, providing an objective basis for subsequent screening. The updated safety factor corresponding to each updated parameter group is checked to see if it meets a preset safety factor threshold. Initial screening is performed using strength as a hard constraint to quickly eliminate unsafe and unusable parameter groups, ensuring structural safety. If the updated safety factor meets the preset safety factor threshold, the updated parameter group is used as a candidate parameter group. Solutions with acceptable strength are retained, narrowing the optimization range and improving the efficiency and reliability of subsequent screening and optimization. Each candidate parameter group is adjusted to obtain a backup parameter group. While ensuring strength compliance, the lightweighting effect is further improved, and the parameters are made more compatible with the manufacturing process, forming a stable and usable final candidate solution.

[0020] In one optional implementation, the spare parameter set is determined as the final parameter set corresponding to the cross-section of the target I-beam connecting rod, including: constructing a finite element strength analysis model of the connecting rod based on the spare parameter set, and calculating the strength of the target I-beam connecting rod constructed based on the spare parameter set; establishing a buckling analysis model based on the spare parameter set, and calculating the buckling of the target I-beam connecting rod constructed based on the spare parameter set; constructing a finite element strength analysis model of the connecting rod based on the spare parameter set, and calculating the dynamic oil film thickness of the target I-beam connecting rod constructed based on the spare parameter set; constructing a constrained buckling mode model of the connecting rod based on the spare parameter set, and calculating the buckling mode of the target I-beam connecting rod constructed based on the spare parameter set; detecting whether the strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements; if the strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements, then the spare parameter set is determined as the final parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0021] The method for determining the cross-sectional parameters of an I-beam connecting rod provided in this application embodiment constructs a finite element strength analysis model of the connecting rod based on a set of spare parameters, and calculates the strength corresponding to the target I-beam connecting rod constructed based on the spare parameter set. This verifies the actual stress strength of the connecting rod from a simulation perspective, ensuring structural safety and reliability, and providing a strength basis for the final parameter determination. Based on the spare parameter set, a buckling analysis model is established to calculate the buckling of the target I-beam connecting rod constructed based on the spare parameter set. This verifies the connecting rod's resistance to instability under compression, preventing bending and instability failure during operation and improving structural stability. Based on the spare parameter set, a finite element strength analysis model of the connecting rod is constructed to calculate the dynamic oil film thickness corresponding to the target I-beam connecting rod constructed based on the spare parameter set. This verifies the lubrication state of the connecting rod and crankshaft engagement, ensuring sufficient lubrication, reducing wear, and extending service life. Based on the spare parameter set, a constrained buckling mode model of the connecting rod is constructed to calculate the buckling modes corresponding to the target I-beam connecting rod constructed based on the spare parameter set. This identifies the risk of connecting rod resonance, ensuring avoidance of engine operating frequencies and preventing vibration failure. The method checks whether the strength, buckling, dynamic oil film thickness, and buckling modes all meet the corresponding preset requirements. A unified verification of multiple performance parameters is implemented to ensure that all parameter sets meet the standards, avoiding the situation where a single indicator is qualified but the whole is unusable. If the strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements, the backup parameter set is determined as the final parameter set corresponding to the cross-section of the target I-beam connecting rod. The optimal parameters that simultaneously satisfy strength, stability, lubrication, and anti-resonance are locked to form a final solution that can be directly used for design and manufacturing.

[0022] In an optional implementation, the method further includes: if at least one of the strength, buckling, dynamic oil film thickness, and buckling mode does not meet the corresponding preset requirements, then the backup parameter set is adjusted based on the detection results; until the strength, buckling, dynamic oil film thickness, and buckling mode calculated after adjustment all meet the corresponding preset requirements, a target parameter set is obtained; the target parameter set is determined as the final parameter set corresponding to the cross-section of the bar in the target I-beam connecting rod.

[0023] The method for determining the cross-sectional parameters of an I-beam connecting rod provided in this application involves adjusting the backup parameter set based on the test results if at least one of the following parameters—strength, buckling, dynamic oil film thickness, and buckling mode—fails to meet the corresponding preset requirements: Targeted corrections are made for the non-compliant items, addressing performance shortcomings without compromising existing acceptable performance, ensuring the parameter set continuously optimizes towards "full compliance." This process continues until the calculated strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements, yielding the target parameter set. Through iterative verification and optimization, the final target parameter set is ensured to fully meet engineering requirements in terms of strength, buckling, lubrication, and resonance, avoiding design pitfalls. The target parameter set is then defined as the final parameter set corresponding to the cross-section of the target I-beam connecting rod. The optimal parameters, balancing safety, reliability, lightweight design, and manufacturability, are locked in to form a final design scheme directly usable for modeling and production.

[0024] Secondly, the present invention provides a device for determining the cross-sectional parameters of an I-beam connecting rod, the device comprising:

[0025] The acquisition module is used to acquire the initialization parameter set corresponding to the cross-section of the target I-beam connecting rod; the initialization parameter set includes multiple initialization parameters;

[0026] The calculation module is used to calculate the initial mass reduction and initial safety factor of the target I-beam connecting rod based on the initialization parameter set and the preset mathematical formula; the mathematical formula includes at least one of the following: cross-sectional area calculation formula, mass calculation formula, stress calculation formula, and safety factor derivation formula;

[0027] The first update module is used to update the initial parameter set based on the initial mass reduction and the initial safety factor, so as to obtain multiple sets of updated parameter sets corresponding to the target I-beam connecting rod.

[0028] The second update module is used to verify each update parameter group and update each update parameter group based on the verification results to obtain the backup parameter group;

[0029] The determination module is used to determine the backup parameter set as the final parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0030] The I-beam connecting rod section parameter determination device provided in this application embodiment obtains the initial parameter set corresponding to the cross-section of the target I-beam connecting rod. It clarifies the initial geometric parameter benchmark for the I-beam connecting rod section design, providing basic data support for all subsequent performance calculations and parameter optimizations, defining the initial range for parameter optimization, and ensuring that subsequent processes have clear calculation and adjustment targets. Based on the initial parameter set, and relying on preset mathematical formulas, it calculates the initial mass reduction and initial safety factor corresponding to the target I-beam connecting rod; the mathematical formulas include at least one of the following: cross-sectional area calculation formula, mass calculation formula, stress calculation formula, and safety factor derivation formula. It achieves a quantitative evaluation of the dual objectives of lightweighting and strength in the initial parameter set, obtaining initial benchmark values ​​for the two core objectives, providing a comparative reference for subsequent parameter update optimization, and clarifying the optimization direction of parameter adjustment (increasing mass reduction and ensuring the safety factor meets the standard). Based on the initial mass reduction and the initial safety factor, the initial parameter set is updated to obtain multiple updated parameter sets corresponding to the target I-beam connecting rod. Starting from the initial parameter set, multiple candidate parameter schemes are iteratively generated around the dual objectives of lightweighting and strength. This avoids the limitations of a single parameter combination, provides sufficient optimization samples for subsequent verification and screening, and achieves the core transition from "initial parameters" to "optimized candidate parameters." Each updated parameter set is verified, and based on the verification results, each updated parameter set is updated to obtain a backup parameter set. Updated parameter sets that fail to meet strength or lightweighting requirements are eliminated through verification. The compliant parameter sets are further refined and adjusted, and backup parameter sets that meet the basic requirements of the dual objectives are screened and optimized. This completes the initial screening and optimization of parameters, laying a reliable foundation for the final parameter determination and preventing invalid parameter sets from entering the final stage. The backup parameter set is determined as the final parameter set corresponding to the cross-section of the target I-beam connecting rod. By identifying the optimal parameter set that meets the core design requirements of "maximizing lightweighting and achieving strength standards," the optimization loop of the entire bar cross-sectional parameters is completed. This provides a unique and reliable basis for the subsequent modeling, manufacturing, and application of the target I-beam connecting rod, ensuring the accuracy of the determined I-beam connecting rod cross-sectional parameters and thus guaranteeing the engineering practicality of the target I-beam connecting rod.

[0031] Thirdly, the present invention provides an electronic device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the method for determining the cross-sectional parameters of the I-beam connecting rod described in the first aspect or any corresponding embodiment thereof.

[0032] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the method for determining the cross-sectional parameters of an I-beam connecting rod as described in the first aspect or any corresponding embodiment thereof.

[0033] Fifthly, the present invention provides a computer program product, including computer instructions, which are used to cause a computer to execute the method for determining the cross-sectional parameters of the I-beam connecting rod as described in the first aspect or any corresponding embodiment thereof. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the first process for determining the cross-sectional parameters of an I-beam connecting rod according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the target I-beam connecting rod model according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the second process for determining the cross-sectional parameters of an I-beam connecting rod according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of a 1 / 4 link section of the target I-beam link according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the first division of the 1 / 4 section of the target I-beam connecting rod according to an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of a second division of the 1 / 4 section of the target I-beam connecting rod according to an embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of splitting the 1 / 4 section of the connecting rod of the target I-beam according to an embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram illustrating the contribution of each initialization parameter to the initial mass reduction amount according to an embodiment of the present invention.

[0043] Figure 9 This is a schematic diagram illustrating the contribution of each initialization parameter to the initial safety factor according to an embodiment of the present invention.

[0044] Figure 10 This is a schematic diagram of establishing rbe2 at the center of the large end and the center of the small end of the target I-beam connecting rod according to an embodiment of the present invention;

[0045] Figure 11 This is a structural block diagram of the I-beam connecting rod section parameter determination device according to an embodiment of the present invention;

[0046] Figure 12 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] It is understood that before using the technical solutions disclosed in the various embodiments of the present invention, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in the present invention and their authorization should be obtained in accordance with relevant laws and regulations through appropriate means.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] According to an embodiment of the present invention, a method for determining the cross-sectional parameters of an I-beam connecting rod is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0051] This embodiment provides a method for determining the cross-sectional parameters of an I-beam connecting rod, which can be used in electronic equipment. Figure 1 This is a flowchart of a method for determining the cross-sectional parameters of an I-beam connecting rod according to an embodiment of the present invention, as shown below. Figure 1 As shown, the process includes the following steps:

[0052] Step S101: Obtain the initialization parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0053] The initialization parameter group includes multiple initialization parameters.

[0054] Specifically, such asFigure 2 The schematic diagram of the target I-beam connecting rod model shown is as follows. Figure 2 In the diagram, the vertical direction is the x-axis, and the horizontal direction to the right is the y-axis. The initialization parameter set can include the total length B of the cross-section of the linkage model, the total height H of the cross-section, and the thickness of the middle plate of the cross-section. Straightness height in the edge height direction I-beam reinforcement thickness Length of the middle plate of the cross section The nine parameters, namely the fillet R formed by the angle between the cross-section height and length, the chamfer r at the end of the rib, and the bevel α, can comprehensively characterize the geometric features of the connecting rod I-beam cross-section and meet the engineering design requirements of the connecting rod body.

[0055] Specifically, the electronic device can receive the initial parameter set corresponding to the cross section of the target I-beam connecting rod input by the user. The electronic device can also determine the initial design value of each initial parameter according to the engineering design requirements of the target I-beam connecting rod, combined with factors such as manufacturing process and cross section structure limitations, to form a complete initial parameter set (i.e., the original parameter set that has not been optimized and only meets the basic design requirements).

[0056] Step S102: Based on the initialization parameter set and relying on the preset mathematical formula, calculate the initial mass reduction and initial safety factor corresponding to the target I-beam connecting rod.

[0057] Among them, the mathematical formulas include at least one of the following: cross-sectional area calculation formula, mass calculation formula, stress calculation formula, and safety factor derivation formula.

[0058] Specifically, the electronic device can take the initialization parameter set as input and rely on preset mathematical formulas (such as cross-sectional area calculation formula, mass calculation formula, stress calculation formula, safety factor derivation formula, etc.) to establish the calculation logic of parameters and performance indicators, and obtain the initial mass reduction and initial safety factor corresponding to the target I-beam connecting rod.

[0059] This step will be explained in detail below.

[0060] Step S103: Based on the initial mass reduction and the initial safety factor, update the initial parameter set to obtain multiple updated parameter sets corresponding to the target I-beam connecting rod.

[0061] Specifically, the electronic device can use the initial mass reduction (lightweight benchmark) and initial safety factor (strength benchmark) as references, combined with preset optimization objectives (such as maximizing mass reduction and meeting safety factor standards), to determine the direction and range of parameter updates. Then, based on the direction and range of parameter updates, the initial parameter set is updated to obtain multiple sets of updated parameter sets corresponding to the target I-beam connecting rod.

[0062] This step will be explained in detail below.

[0063] Step S104: Verify each updated parameter group, and update each updated parameter group based on the verification results to obtain a backup parameter group.

[0064] Among them, there is at least one set of spare parameters.

[0065] Specifically, for each set of updated parameters, the electronic device can repeat the calculation logic of step S102 to obtain the mass reduction and safety factor corresponding to that set of parameters, and verify whether it meets the preset performance constraints. Based on the verification results, each set of updated parameters is updated to obtain a backup set of parameters.

[0066] This step will be explained in detail below.

[0067] Step S105: Determine the spare parameter set as the final parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0068] Specifically, the electronic equipment can select the target parameter set that maximizes the reduction in mass and meets the safety factor from various backup parameter sets (if there are multiple backup parameter sets, the set with the best overall performance is selected). Finally, the selected target parameter set is officially recognized as the final parameter set for the cross-section of the target I-beam connecting rod, serving as the core basis for subsequent connecting rod construction and manufacturing.

[0069] The method for determining the cross-sectional parameters of an I-beam connecting member provided in this application obtains an initial parameter set corresponding to the cross-section of the target I-beam connecting member. It clarifies the initial geometric parameter benchmarks for the I-beam connecting member's cross-section design, providing fundamental data support for all subsequent performance calculations and parameter optimizations, defining the initial range for parameter optimization, and ensuring that subsequent processes have clearly defined calculation and adjustment targets. Based on the initial parameter set, and relying on preset mathematical formulas, it calculates the initial mass reduction and initial safety factor corresponding to the target I-beam connecting member; the mathematical formulas include at least one of the following: cross-sectional area calculation formula, mass calculation formula, stress calculation formula, and safety factor derivation formula. It achieves a quantitative evaluation of the dual objectives of lightweighting and strength in the initial parameter set, obtaining initial benchmark values ​​for the two core objectives, providing a comparative reference for subsequent parameter updates and optimizations, and clarifying the optimization direction for parameter adjustments (increasing mass reduction and ensuring the safety factor meets standards). Based on the initial mass reduction and initial safety factor, the initial parameter set is updated to obtain multiple updated parameter sets corresponding to the target I-beam connecting member. Starting from the initial parameter set, multiple candidate parameter schemes are iteratively generated around the dual objectives of lightweighting and strength. This avoids the limitations of a single parameter combination, provides sufficient optimization samples for subsequent verification and screening, and achieves the core transition from "initial parameters" to "optimized candidate parameters." Each updated parameter set is verified, and based on the verification results, each updated parameter set is updated to obtain a backup parameter set. Updated parameter sets that fail to meet strength or lightweighting requirements are eliminated through verification. The compliant parameter sets are further refined and adjusted, and backup parameter sets that meet the basic requirements of the dual objectives are screened and optimized. This completes the initial screening and optimization of parameters, laying a reliable foundation for the final parameter determination and preventing invalid parameter sets from entering the final stage. The backup parameter set is determined as the final parameter set corresponding to the cross-section of the target I-beam connecting rod. By identifying the optimal parameter set that meets the core design requirements of "maximizing lightweighting and achieving strength standards," the optimization loop of the entire bar cross-sectional parameters is completed. This provides a unique and reliable basis for the subsequent modeling, manufacturing, and application of the target I-beam connecting rod, ensuring the accuracy of the determined I-beam connecting rod cross-sectional parameters and thus guaranteeing the engineering practicality of the target I-beam connecting rod.

[0070] This embodiment provides a method for determining the cross-sectional parameters of an I-beam connecting rod, which can be used in electronic equipment. Figure 3 This is a flowchart of a method for determining the cross-sectional parameters of an I-beam connecting rod according to an embodiment of the present invention, as shown below. Figure 3 As shown, the process includes the following steps:

[0071] Step S201: Obtain the initialization parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0072] The initialization parameter group includes multiple initialization parameters.

[0073] Please refer to the above description of step S101 for details on this step, which will not be repeated here.

[0074] Step S202: Based on the initialization parameter set and relying on the preset mathematical formula, calculate the initial mass reduction and initial safety factor corresponding to the target I-beam connecting rod.

[0075] Among them, the mathematical formulas include at least one of the following: cross-sectional area calculation formula, mass calculation formula, stress calculation formula, and safety factor derivation formula.

[0076] Specifically, step S202 above may include the following steps:

[0077] Step S2021: Based on the initialization parameter set, calculate the initial cross-sectional area of ​​the target I-beam connecting rod.

[0078] Specifically, step S2021 above may include the following steps:

[0079] Step a1: Based on the initialization parameter set, the initial cross-sectional area of ​​the rod is divided into multiple sub-cross-sectional area regions.

[0080] Specifically, the electronic device can divide the initial cross-sectional area of ​​the pole into four sub-cross-sectional areas of equal area along the horizontal and vertical centerlines, based on the symmetry of the initial pole cross-sectional area.

[0081] For each sub-cross-sectional area region, the electronic device can determine the position and size of each geometric feature based on initialization parameters, dividing the initial cross-sectional area of ​​the rod into multiple regular sub-cross-sectional area regions (such as semi-circular regions, small rectangular regions, large rectangular regions, triangular regions, sector regions, etc.). Each sub-cross-sectional area region after division is labeled (e.g., sub-region 2: semi-circle, sub-region 3: large rectangle, sub-region 4: small rectangle), clarifying the correspondence between the geometric boundaries of each sub-region and the initialization parameters (e.g., the diameter of the semi-circle is determined by a certain initialization parameter, and the length and width of the rectangle correspond to specific initialization parameters).

[0082] For example, such as Figure 4 As shown, taking a 1 / 4 initial shaft cross-sectional area as an example, let the 1 / 4 initial shaft cross-sectional area be 1, let the intersection of the left curve and the straight line in 1 be point a, let the intersection of the left straight line and the straight line be point b, let the intersection of the right curve and the curve in 1 be point c, and let the intersection of the right curve and the straight line in 1 be point d. Figure 5 As shown, with points b and d as the longer sides of the rectangle, connect points a and c and extend line segment ac in the opposite direction. Draw perpendicular lines upwards from points b and d, intersecting the extended line segment ac in the opposite direction, thus obtaining a large rectangle 3, a semicircle 2, and a small rectangle 4. Figure 6As shown, the geometric relationship of the large rectangular region 3 in the middle is constructed and divided. Region 5 is the area of ​​the triangle added to construct the sector. The uppermost vertex of the triangle is the center of the sector. Then, the area of ​​the irregular region in the middle is equal to the area of ​​the large rectangle 3 minus the area of ​​the small triangle 6 minus the area of ​​the sector 7 plus the area of ​​the sector triangle 5, ultimately forming... Figure 6 and Figure 7 The overall assembly diagram and the operation instructions diagram.

[0083] Specifically, calculate the area of ​​1 / 4 of the initial rod cross-section:

[0084] (1) Area of ​​semicircle 2 ;

[0085] (2) Area of ​​small rectangle 4 ;

[0086] (3) Area of ​​the large rectangle 3 ;

[0087] (4) Area of ​​small triangle 6 ;

[0088] (5) Area of ​​sector triangle 5

[0089] ;

[0090] (6) Area of ​​sector 7 .

[0091] Step a2: Calculate the initial cross-sectional area of ​​the target I-beam connecting rod based on each sub-cross-sectional area region.

[0092] Specifically, the electronic device calculates the initial cross-sectional area of ​​the target I-beam connecting rod based on each sub-cross-sectional area region.

[0093] For example, the initial cross-sectional area of ​​the rod is:

[0094] .

[0095] Step S2022: Calculate the initial mass reduction and the initial safety factor based on the initial cross-sectional area of ​​the pole.

[0096] Specifically, electronic devices can obtain the minimum permissible cross-sectional area. Then, the electronic equipment calculates the initial mass reduction based on the initial rod cross-sectional area and the minimum permissible cross-sectional area. The formula is as follows:

[0097] ;

[0098] in, The initial cross-sectional area of ​​the rod. This refers to the minimum permissible cross-sectional area, which is limited to the range of nine defined parameters. The minimum allowable cross-sectional area represents the cross-sectional area corresponding to the minimum cross-sectional geometry, provided that all processing and structural lower limit constraints are met. The minimum permissible cross-sectional area set for this application embodiment, that is, the cross-sectional area of ​​the shaft corresponding to the final parameter set calculated based on the specific calculation process of this application, is limited to the range of nine defined parameters. In the initial state, That is ,Right now .

[0099] After updating the initial parameter set to obtain the updated parameter set, the formula can be transformed into: ,in, To update the cross-sectional area of ​​the rod corresponding to the updated parameter set, This is the update quality reduction amount corresponding to the updated parameter group. For example, as shown in Table 1 below, it is a schematic table of parameter variation ranges for 9 parameters. Among them, the parameter variation ranges of 6 parameters are shown in Table 1, and the other 3 parameters contribute little to the quality reduction amount, so they are set to constant values. , Let be the length of the connecting rod. The density is the link density.

[0100] Table 19 illustrates the range of parameter variations.

[0101]

[0102] Specifically, the initial pole cross-sectional area includes multiple sub-cross-sectional area regions; the "calculate the initial safety factor based on the initial pole cross-sectional area" in step S2022 above may include the following steps:

[0103] Step b1: Calculate the sub-moment of inertia corresponding to each sub-cross-sectional area.

[0104] Specifically, the electronic device can calculate the moment of inertia along XX and YY corresponding to each sub-cross-sectional area in the initial rod cross-sectional area.

[0105] For example, such as Figure 5 As shown, the electronic device calculates the moments of inertia of semicircle 2, small rectangle 4, large rectangle 3, small triangle 6, sector triangle 5, and sector 7 along the X and Y axes, respectively. The specific formulas are as follows:

[0106] (1) The moments of inertia of semicircle 2 in the XX and YY directions are respectively:

[0107] ;

[0108] .

[0109] (2) The moments of inertia of small rectangle 4 in the XX and YY directions are respectively:

[0110] ;

[0111] .

[0112] (3) The moments of inertia of the large rectangle 3 in the XX and YY directions are respectively:

[0113] ;

[0114] .

[0115] (4) The moments of inertia of small triangle 6 in the XX and YY directions are respectively:

[0116] ;

[0117] .

[0118] (5) The moments of inertia of sector triangle 5 in the XX and YY directions are respectively:

[0119]

[0120] ;

[0121] Among them, the width of the sector triangle .

[0122] (6) The moments of inertia of sector 7 in the XX and YY directions are respectively:

[0123] ;

[0124] ;

[0125] The included angle (central angle) of the sector is defined as follows: Define the angle between the sector's axis of symmetry and the y-axis: .

[0126] Step b2: Calculate the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod based on each sub-moment of inertia.

[0127] Specifically, the electronic device can sum the individual moments of inertia in the XX direction to obtain the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the XX direction. Similarly, the electronic device can sum the individual moments of inertia in the YY direction to obtain the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the YY direction.

[0128] Specifically, the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the XX direction is:

[0129] ;

[0130] The total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the YY direction is:

[0131] .

[0132] Step b3: Calculate the initial safety factor based on the total moment of inertia.

[0133] Specifically, step b3 above may include the following steps:

[0134] Step b31: Based on the total moment of inertia, calculate the compressive stress in the swing plane and the compressive stress in the vertical swing plane corresponding to the target I-beam connecting rod.

[0135] Specifically, the electronic device can calculate the maximum burst pressure on the target I-beam connecting rod based on the following formula. : .in, The pressure load under maximum burst pressure, This is the maximum in-cylinder pressure (the maximum cylinder pressure designed for the engine). This refers to the pressure inside the crankcase, under normal circumstances. , Cylinder diameter.

[0136] Electronic devices can calculate the inertial force of piston assemblies based on the following formula. ,Right now:

[0137] .in, It is the total mass of the piston, piston rings, and retaining rings. It is the crank radius. Rated speed, It is the connecting rod ratio, and the connecting rod ratio = connecting rod length / crank radius.

[0138] Then, the electronic equipment can be based on the maximum burst pressure. Inertial force of piston assembly and the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the XX direction. The compressive stress in the swing plane corresponding to the target I-beam connecting rod is calculated using the following formula:

[0139] ;

[0140] in, The length is the center length of the connecting rod's large and small ends. The initial cross-sectional area of ​​the rod. Let be the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the XX direction. Inertial forces of the piston assembly This represents the greatest burst of pressure.

[0141] Next, electronic devices can be based on maximum burst pressure. Inertial force of piston assembly And the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the YY direction, calculate the compressive stress in the vertical swing plane corresponding to the target I-beam connecting rod, as follows:

[0142] ;

[0143] in, This is the minimum length of the side of the connecting rod's large and small end holes. The initial cross-sectional area of ​​the rod. Let be the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the YY direction. Inertial forces of the piston assembly This represents the greatest burst of pressure.

[0144] Step b32: Calculate the safety factor in the swing plane corresponding to the target I-beam connecting rod based on the compressive stress in the swing plane.

[0145] Specifically, the electronic device can use the following formula to calculate the safety factor in the swing plane corresponding to the target I-beam connecting rod, based on the compressive stress in the swing plane.

[0146] The electronic device calculates the tensile stress of the connecting rod based on the maximum burst pressure and the initial cross-sectional area of ​​the target I-beam connecting rod:

[0147] ;

[0148] Then, the electronic device calculates the safety factor in the swing plane based on the compressive stress and the tensile stress of the connecting rod, using the following formula:

[0149] ;

[0150] in, The symmetrical fatigue strength of the material corresponding to the target I-beam connecting rod. For the tensile stress of the connecting rod, This represents the compressive stress within the oscillating plane.

[0151] Step b33: Calculate the safety factor in the vertical swing plane corresponding to the target I-beam connecting rod based on the compressive stress in the vertical swing plane.

[0152] Specifically, the electronic device can calculate the safety factor in the vertical swing plane corresponding to the target I-beam link based on the compressive stress in the vertical swing plane using the following formula:

[0153] ;

[0154] in, The symmetrical fatigue strength of the material corresponding to the target I-beam connecting rod. For the tensile stress of the connecting rod, This represents the compressive stress on the vertically oscillating plane.

[0155] Step b34: Calculate the initial safety factor based on the safety factor in the swing plane and the safety factor in the vertical swing plane.

[0156] Specifically, the electronic device can perform integrated calculations on the safety factors in the swing plane and the vertical swing plane according to preset engineering integration rules. For example, if the minimum value rule is used, the smaller value between the safety factors in the swing plane and the vertical swing plane is directly used as the initial safety factor; if the weighted average rule is used, different weights are assigned according to the force ratio of the two planes, and then the safety factors in the swing plane and the vertical swing plane are integrated and calculated to obtain the initial safety factor.

[0157] Among them, the initial safety factor is the core quantitative indicator of the overall strength of the link under the initialization parameter set. Whether its value meets the preset design threshold (such as ≥1.25) is the key basis for judging whether the strength of the link corresponding to the current initialization parameter set meets the standard, and directly guides the direction of subsequent parameter set updates and optimizations.

[0158] Step S203: Based on the initial mass reduction and the initial safety factor, update the initial parameter set to obtain multiple updated parameter sets corresponding to the target I-beam connecting rod.

[0159] Specifically, step S203 above may include the following steps:

[0160] Step S2031: Calculate the contribution of each initialization parameter in the initialization parameter group to the initial mass reduction and the contribution of each initialization parameter to the initial safety factor.

[0161] Specifically, electronic devices can use each initialization parameter as a design variable and generate multiple sets of parameter test points according to a preset reasonable variation range (based on manufacturing process and cross-sectional structure limitations) through the DOE algorithm.

[0162] Then, for each set of test points, the mass reduction and safety factor corresponding to each test parameter are calculated, establishing a correlation dataset of "parameter value - mass reduction - safety factor". Next, electronic devices can use methods such as Pareto analysis to quantify the percentage contribution of each initialization parameter to the mass reduction and safety factor (e.g., parameter A contributes 15% to the mass reduction and 12% to the safety factor, parameter B contributes 3% to the mass reduction and 2% to the safety factor). For example, ... Figure 8 As shown, this illustrates the contribution of each initialization parameter to the initial mass reduction. Figure 9 As shown, this represents the contribution of each initialization parameter to the initial safety factor.

[0163] Electronic devices can clearly define the "direction of the effect" of their contribution (positive effect: parameters increase, objective function is optimized; negative effect: parameters increase, objective function is deteriorated), but the core focus is on the magnitude of the contribution (i.e. the degree of influence).

[0164] Step S2032: Select at least one initialization parameter whose quality reduction contribution is greater than a preset contribution threshold and / or whose safety factor contribution is greater than a preset contribution threshold as an updatable core parameter.

[0165] Specifically, the electronic device can set a preset contribution threshold based on engineering design experience or optimization accuracy requirements. Then, the electronic device compares the contribution of each initialization parameter to the initial mass reduction and the contribution of each initialization parameter to the initial safety factor with the preset contribution threshold. The electronic device then selects the initialization parameters whose contribution to the initial mass reduction is greater than the preset contribution threshold and / or whose contribution to the initial safety factor is greater than the preset contribution threshold as updatable core parameters.

[0166] The electronic device will use each initialization parameter that contributes less than or equal to a preset contribution threshold to the initial mass reduction and contributes less than or equal to a preset contribution threshold to the initial safety factor as a non-updateable core parameter.

[0167] Step S2033: Based on each updatable core parameter, update the initial parameter group to obtain multiple updated parameter groups corresponding to the target I-beam connecting rod.

[0168] Each group of update parameters includes multiple update parameters.

[0169] Specifically, the electronic device only adjusts the values ​​of updatable core parameters, while non-updatable parameters always retain their initial values. Each set of updateable parameters includes all cross-sectional parameters (core parameters are updated, while other parameters remain unchanged).

[0170] For updatable core parameters, the electronic device can perform multiple rounds of value adjustments at preset step sizes (such as ±5% or ±10% of the initial value). Each time a combination adjustment of the core parameters is completed, a new set of updated parameters is generated. After multiple iterations, all generated parameter combinations are summarized to obtain multiple sets of updated parameter sets, each of which is an optimized iteration result of the initial parameter set. Finally, multiple sets of updated parameter sets are obtained for the target I-beam connecting rod (each set contains multiple updated parameters, with different values ​​for the core parameters and the same values ​​for the non-updatable parameters).

[0171] Step S204: Verify each updated parameter group, and update each updated parameter group based on the verification results to obtain a backup parameter group.

[0172] Specifically, step S204 above may include the following steps:

[0173] Step S2041: Calculate the reduction in update quality and the update safety factor corresponding to each update parameter group.

[0174] Specifically, the electronic device can calculate the reduction in update quality and the update safety factor corresponding to each update parameter group based on the calculation process described above.

[0175] Step S2042: Check whether the update safety coefficient corresponding to each update parameter group meets the preset safety coefficient threshold.

[0176] Specifically, the electronic device can receive a preset safety factor threshold input by the user, or it can set a preset safety factor threshold according to the design accuracy and design requirements of the target I-beam connecting rod.

[0177] Then, the electronic device can check the update safety coefficient of each set of update parameters one by one, and detect whether the update safety coefficient value is greater than or equal to the preset safety coefficient threshold, thereby distinguishing between two types of update parameter sets: those with the update safety coefficient meeting the standard and those with the update safety coefficient not meeting the standard.

[0178] Step S2043: If the updated safety factor meets the preset safety factor threshold, then the updated parameter group is used as the candidate parameter group.

[0179] Specifically, if the updated security factor meets the preset security factor threshold, the electronic device can use the updated parameter group as a candidate parameter group.

[0180] Step S2044: Adjust each candidate parameter group to obtain the backup parameter group.

[0181] Specifically, the electronic device can slightly adjust the core parameter values ​​(e.g., appropriately reduce the board thickness) for parameter combinations in the candidate parameter group where the candidate safety factor is much higher than the preset safety factor threshold (e.g., >1.5), further improving the reduction in quality while ensuring that the adjusted safety factor is still greater than or equal to the preset safety factor threshold. Then, for some core parameter values ​​in the candidate parameter group that are close to the processing limit, slight corrections are made to make them more in line with the actual production process without reducing the reduction in quality or exceeding the safety factor threshold.

[0182] If multiple candidate parameter groups exist, compare their update quality reduction amounts, retain the parameter group with better lightweighting effect, and eliminate the poorly performing ones. The candidate parameter groups that have undergone fine adjustment and optimization are determined as backup parameter groups (there can be one or more groups, all of which meet the requirements of "safety factor compliance + optimal lightweighting + process compatibility").

[0183] Step S205: Determine the spare parameter set as the final parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0184] Specifically, if only one set of backup parameters exists, the electronic device can determine this set of backup parameters as the final set of parameters for the cross-section of the target I-beam connecting rod.

[0185] If multiple sets of backup parameters exist, the electronic equipment can compare the backup mass reduction corresponding to each set of backup parameters and select the set with the largest backup mass reduction. If the backup mass reduction is close, the set with a more reasonable safety factor and better process adaptability is selected as the final parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0186] Specifically, step S205 above may include the following steps:

[0187] Step S2051: Based on the spare parameter set, construct a finite element strength analysis model of the connecting rod and calculate the strength of the target I-beam connecting rod constructed based on the spare parameter set.

[0188] Specifically, the electronic device can mesh the 3D model of the target I-beam connecting rod based on the backup parameter set (refining the mesh for key sections of the rod and stress concentration areas), and assign material mechanical properties to the model. Then, it simulates the actual working state of the target I-beam connecting rod, fixing the inner wall of the large end hole (simulating crankshaft constraints), and applying a combined load of the engine's maximum burst pressure and the piston assembly's inertial force to the inner wall of the small end hole. Next, the electronic device runs a finite element analysis to solve for the stress cloud diagram, maximum equivalent stress value, and fatigue safety factor of the target I-beam connecting rod, using the fatigue safety factor and maximum stress value as the core strength indicators corresponding to the backup parameter set.

[0189] Step S2052: Based on the spare parameter set, establish a buckling analysis model and calculate the buckling of the target I-beam connecting rod constructed based on the spare parameter set.

[0190] Specifically, the electronic device can reuse the mesh model of the target I-beam connecting rod corresponding to the strength analysis, simplifying non-core constraints and retaining only the key constraints along the axial direction of the rod. Then, the actual maximum working compressive load is applied along the axial direction of the target I-beam connecting rod, the linear buckling analysis type is selected, and the first 5 buckling modes are solved to obtain the buckling critical load and buckling mode shape of the target I-beam connecting rod corresponding to the spare parameter set. The buckling critical load is used as the core buckling performance index (reflecting the resistance to instability). The specific solution process is existing technology and will not be elaborated here.

[0191] Step S2053: Based on the spare parameter set, construct a finite element strength analysis model of the connecting rod and calculate the dynamic oil film thickness corresponding to the target I-beam connecting rod constructed based on the spare parameter set.

[0192] Specifically, the electronic device can establish a piston-connecting rod-crankshaft multibody dynamics model, and input dynamic parameters such as connecting rod mass, center of mass, and moment of inertia corresponding to the spare parameter set into the piston-connecting rod-crankshaft multibody dynamics model. Then, a lubrication model is set at the contact point between the connecting rod big end and the crankshaft journal, and the properties of the lubricating oil are input;

[0193] The electronic equipment can simulate typical operating conditions of the engine, such as idling speed, rated speed, and maximum speed, and solve for the minimum dynamic oil film thickness and oil film pressure distribution at the connecting rod big end journal under different operating conditions. Finally, the minimum dynamic oil film thickness at the connecting rod big end journal corresponding to the spare parameter set (for each typical operating condition) is obtained.

[0194] Step S2054: Based on the spare parameter set, construct the link constrained buckling mode model and calculate the buckling mode corresponding to the target I-beam link constructed based on the spare parameter set.

[0195] Specifically, the electronic device can establish RBE2 rigid elements at the center of the large end and the center of the small end of the target I-beam connecting rod (the large end RBE2 connects to the upper semicircle, and the small end RBE2 connects to the lower semicircle, simulating the compression condition). The electronic device sets constraints in different planes according to the motion law of the connecting rod. For the swing plane (yz), the small end is constrained with degrees of freedom 1, 2, 5, and 6, and the large end is constrained with degrees of freedom 1, 2, 3, 5, and 6; for the vertical plane (yx), the small end is constrained with degrees of freedom 1, 2, 4, 5, and 6, and the large end is constrained with degrees of freedom 1, 2, 3, 4, 5, and 6. For example, Figure 10 The diagram shows a schematic of establishing rbe2 at the center of the big end and the center of the small end of the connecting rod of the target I-beam.

[0196] The large end center rbe2 is connected to the upper half of the large end according to the working condition of the connecting rod under compression, and the small end center rbe2 is connected to the lower half of the small end according to the working condition of the small end.

[0197] The electronic device applies a unit force of -1000N in the Z direction at the small end rbe2 point, defines a buckling analysis step (STEP, NAME=Buckle, NLGEOM=NO, PERTURBATION), and solves for the first 5 buckling modes. The electronic device extracts the first-order buckling mode frequency (a core indicator with the highest resonance risk) and mode shapes of the target I-beam link. This yields the first-order buckling mode frequency and mode shapes of the target I-beam link corresponding to the spare parameter set.

[0198] Step S2055: Check whether the strength, buckling, dynamic oil film thickness and buckling mode all meet the corresponding preset requirements.

[0199] Specifically, the electrical equipment can compare the actual calculated values ​​of strength, buckling, dynamic oil film thickness, and buckling mode with their respective preset thresholds, and record whether each indicator meets or fails to meet the standard. Then, it is determined whether all indicators meet the standards and whether any one of them fails to meet the preset requirements.

[0200] Step S2056: If the strength, buckling, dynamic oil film thickness and buckling mode all meet the corresponding preset requirements, then the spare parameter set is determined as the final parameter set corresponding to the cross section of the target I-beam connecting rod.

[0201] Specifically, if the strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements, the electronic device will determine the backup parameter set as the final parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0202] Step S2057: If at least one of the strength, buckling, dynamic oil film thickness, and buckling mode does not meet the corresponding preset requirements, the backup parameter group is adjusted based on the detection results.

[0203] Specifically, if at least one of the following parameters—strength, buckling, dynamic oil film thickness, and buckling mode—fails to meet the corresponding preset requirements, the electronic device identifies which parameter(s) are substandard (e.g., insufficient strength, low first-order buckling mode frequency). Based on the parameter contribution results from step S2031, it identifies the updateable core parameters that significantly affect the substandard parameter (e.g., insufficient strength corresponds to intermediate plate thickness and rib thickness; low mode frequency corresponds to total section height and rib thickness). Then, based on the effect direction of the parameters, the associated core parameters are slightly adjusted. For example, for insufficient strength: increase parameters with a positive effect on the safety factor (e.g., increase intermediate plate thickness and I-beam rib thickness); for low buckling critical load: adjust section parameters to increase the moment of inertia (e.g., increase total section height and fillet radius R); for insufficient oil film thickness: fine-tune the connecting rod big end mass / center of mass parameters (based on the section dimensions corresponding to the spare parameter set) to optimize dynamic matching; for low buckling mode frequency: increase parameters related to the stiffness of the rod section (e.g., decrease the angle α, increase the rib thickness).

[0204] After parameter adjustments, the parameters must remain within the preset reasonable range of variation for each core parameter, and the already achieved indicators must not deteriorate as a result. Finally, the electronic equipment obtains a new set of backup parameters after targeted adjustments.

[0205] Step S2058 continues until the calculated strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements, thus obtaining the target parameter set.

[0206] Specifically, the electronic equipment can sequentially execute S2051 (strength calculation), S2052 (buckling calculation), S2053 (oil film thickness calculation), and S2054 (buckling mode calculation) on the adjusted new backup parameter set. Execution S2055 completes the comprehensive multi-index test. If any index still fails to meet the standards, the process returns to S2057 for further targeted adjustments. This "adjustment-verification-testing" process is repeated until all performance indicators meet the preset requirements, at which point the parameter set is determined as the target parameter set.

[0207] Step S2059: Determine the target parameter set as the final parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0208] Specifically, the electronic device determines the target parameter set as the final parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0209] The method for determining the cross-sectional parameters of an I-beam connecting member provided in this application, based on an initialization parameter set, divides the initial cross-sectional area of ​​the member into multiple sub-cross-sectional area regions. This method decomposes the irregular and complex cross-section of the I-beam connecting member into regular sub-regions that can be calculated using basic geometric formulas, simplifying the problem of directly and accurately calculating the area of ​​complex cross-sections. The decomposition process, based on the initialization parameters, ensures that the geometric boundaries of each sub-region precisely correspond to the initial parameters, guaranteeing the traceability and accuracy of subsequent area calculations and laying the foundation for overall cross-sectional area calculation. Based on each sub-cross-sectional area region, the initial cross-sectional area of ​​the target I-beam connecting member is calculated. By calculating the area of ​​each regular sub-region separately and then summing the results, the accurate solution for the complex cross-sectional area of ​​the member is achieved, yielding an initial cross-sectional area that perfectly matches the initialization parameter set. This result provides a core and accurate geometric quantitative basis for the subsequent derivation of the initial mass reduction and the initial safety factor, ensuring the reliability of the basic data for subsequent performance index calculations. It is a crucial link connecting the cross-sectional geometric parameters and the member's performance indicators.

[0210] Calculate the sub-moments of inertia corresponding to each sub-cross-sectional area. The calculation of the moment of inertia of complex sections is decomposed into the calculation of the moments of inertia of regular sub-regions, simplifying the solution and avoiding errors from directly calculating the moment of inertia of irregular sections. The sub-moments of inertia are calculated on a unit basis according to the decomposed regular regions, precisely corresponding to the initial parameters, providing traceable and high-precision basic data for the total moment of inertia, ensuring the accuracy of subsequent mechanical calculations. Based on each sub-moment of inertia, calculate the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod. Based on the principle of superposition of moments of inertia of combined graphics, the sub-moments of inertia are summarized to obtain the overall total moment of inertia, scientifically restoring the actual bending stiffness characteristics of the rod cross-section. The total moment of inertia, as a core mechanical parameter characterizing the deformation resistance of the cross-section, provides a key basis for subsequent safety factor calculations and is an important bridge connecting the cross-sectional geometric parameters and the strength index of the connecting rod. Based on the total moment of inertia, calculate the compressive stress in the swing plane and the compressive stress in the vertical swing plane corresponding to the target I-beam connecting rod. The total moment of inertia, characterizing the bending stiffness of the cross section, is transformed into the actual stress value of the core load-bearing surface of the connecting rod. This closely reflects the actual working condition of the connecting rod under multi-plane compression during operation, accurately quantifying the degree of compressive deformation in both the oscillating and vertical oscillating planes. This provides a direct and crucial stress quantification basis for safety factor calculation, making strength assessment more aligned with engineering practice. Based on the compressive stress in the oscillating plane, the safety factor in the oscillating plane corresponding to the target I-beam connecting rod is calculated. Targeted quantification of the strength redundancy of the main load-bearing surfaces of the connecting rod, clarifying the strength compliance of the core load-bearing surface, is a key step in assessing the strength of the connecting rod foundation. This defines a core reference dimension for strength determination, avoiding the failure risk caused by insufficient strength of the main load-bearing surfaces. Based on the compressive stress in the vertical oscillating plane, the safety factor in the vertical oscillating plane corresponding to the target I-beam connecting rod is calculated. Supplementing the quantification of the strength performance of the secondary load-bearing surfaces of the connecting rod overcomes the limitations of single-plane strength assessment, achieving full-dimensional coverage of the connecting rod's load-bearing strength. This makes strength assessment more comprehensive and rigorous, avoiding overall structural problems caused by weaknesses in the strength of secondary load-bearing surfaces. The initial safety factor is calculated based on the safety factors in the swing plane and the vertical swing plane. By integrating the dual-plane strength indices, an initial safety factor that comprehensively characterizes the overall strength of the link is obtained, forming a unified and intuitive strength judgment benchmark. This provides a clear strength reference standard for subsequent parameter updates and optimizations, ensuring that subsequent parameter adjustments always take overall strength compliance as the core bottom line.

[0211] Then, the contribution of each initialization parameter in the initialization parameter group to the initial mass reduction and the contribution of each initialization parameter to the initial safety factor are calculated. This quantifies the impact of each parameter on the dual objectives of lightweighting and strength, clarifies the correlation weight between parameters and core objectives, and distinguishes the direction of parameter effects, addressing the question of "which parameters significantly affect the optimization objectives." This provides a data-driven basis for subsequent parameter selection and avoids blind optimization of all parameters. At least one initialization parameter whose contribution to mass reduction is greater than a preset contribution threshold and / or whose contribution to the safety factor is greater than a preset contribution threshold is selected as an updatable core parameter. By using thresholds to "focus on the big and let go of the small," the core parameters that are critical to the dual objectives are selected, locking in the optimization focus and excluding parameters with low contribution or no significant impact. This reduces the computational load for subsequent parameter updates and improves optimization efficiency. It also avoids processing feasibility issues caused by adjusting low-contribution process parameters, ensuring the engineering practicality of the optimization. Based on each updatable core parameter, the initialization parameter group is updated to obtain multiple updated parameter groups corresponding to the target I-beam connecting rod; each updated parameter group includes multiple updated parameters. Adjusting the values ​​of core parameters without changing the initial values ​​of low-contribution parameters ensures the accuracy of the optimization direction and generates multiple sets of different parameter combinations, providing sufficient candidate samples for subsequent verification and screening. Multiple sets of updated parameters also allow for greater selection in subsequent optimization, making it easier to find the optimal solution that balances lightweightness and strength.

[0212] Next, the reduction in quality and the safety factor for each updated parameter group are calculated. Lightweighting and strength quantification are performed on each candidate parameter group to obtain comparable optimization results, providing an objective basis for subsequent screening. The safety factor for each updated parameter group is checked to see if it meets the preset safety factor threshold. Initial screening is performed using strength as a hard constraint to quickly eliminate unsafe and unusable parameter groups, ensuring structural safety. If the updated safety factor meets the preset safety factor threshold, the updated parameter group is considered a candidate parameter group. Solutions with acceptable strength are retained to narrow the optimization range and improve the efficiency and reliability of subsequent screening and optimization. Each candidate parameter group is adjusted to obtain backup parameter groups. While ensuring strength compliance, the lightweighting effect is further improved, and the parameters are made more compatible with the manufacturing process, forming a stable and usable final candidate solution.

[0213] Based on the spare parameter set, a finite element strength analysis model of the connecting rod is constructed to calculate the strength of the target I-beam connecting rod constructed based on the spare parameter set. This verifies the actual stress strength of the connecting rod from a simulation perspective, ensuring structural safety and reliability, and providing a strength basis for the final parameter determination. Based on the spare parameter set, a buckling analysis model is established to calculate the buckling of the target I-beam connecting rod constructed based on the spare parameter set. This verifies the connecting rod's resistance to instability under compression, preventing bending and instability failure during operation and improving structural stability. Based on the spare parameter set, a finite element strength analysis model of the connecting rod is constructed to calculate the dynamic oil film thickness of the target I-beam connecting rod constructed based on the spare parameter set. This verifies the lubrication state of the connecting rod and crankshaft fit, ensuring sufficient lubrication, reducing wear, and extending service life. Based on the spare parameter set, a constrained buckling modal model of the connecting rod is constructed to calculate the buckling modes of the target I-beam connecting rod constructed based on the spare parameter set. This identifies the risk of connecting rod resonance, ensuring it avoids engine operating frequencies and preventing vibration failure. The strength, buckling, dynamic oil film thickness, and buckling modes are checked to ensure they all meet the corresponding preset requirements. A unified verification of multiple performance parameters is implemented to ensure that all parameter sets meet the standards, avoiding the situation where a single indicator is qualified but the whole is unusable. If the strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements, the backup parameter set is determined as the final parameter set corresponding to the cross-section of the target I-beam connecting rod. The optimal parameters that simultaneously satisfy strength, stability, lubrication, and anti-resonance are locked to form a final solution that can be directly used for design and manufacturing.

[0214] If at least one of the following parameters—strength, buckling, dynamic oil film thickness, and buckling mode—fails to meet the corresponding preset requirements, the backup parameter set is adjusted based on the test results. Targeted corrections are made for the non-compliant items, addressing performance shortcomings without compromising existing acceptable performance, ensuring the parameter set continuously optimizes towards "full compliance." This process continues until the calculated strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements, yielding the target parameter set. Through iterative verification and optimization, the final target parameter set is ensured to meet all engineering requirements in terms of strength, buckling, lubrication, and resonance, avoiding design pitfalls. The target parameter set is then defined as the final parameter set corresponding to the cross-section of the target I-beam connecting rod. The optimal parameters, balancing safety, reliability, lightweight design, and manufacturability, are locked in to form a final design scheme directly usable for modeling and production.

[0215] This embodiment also provides a device for determining the cross-sectional parameters of an I-beam connecting rod. This device is used to implement the above embodiments and preferred embodiments, and details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0216] This embodiment provides a device for determining the cross-sectional parameters of an I-beam connecting rod, such as... Figure 11 As shown, it includes:

[0217] The acquisition module 301 is used to acquire the initialization parameter group corresponding to the cross section of the target I-beam connecting rod; the initialization parameter group includes multiple initialization parameters;

[0218] The calculation module 302 is used to calculate the initial mass reduction and initial safety factor of the target I-beam connecting rod based on the initialization parameter group and the preset mathematical formula; the mathematical formula includes at least one of the following: cross-sectional area calculation formula, mass calculation formula, stress calculation formula, and safety factor derivation formula;

[0219] The first update module 303 is used to update the initial parameter set based on the initial mass reduction and the initial safety factor to obtain multiple sets of updated parameter sets corresponding to the target I-beam connecting rod.

[0220] The second update module 304 is used to verify each update parameter group and update each update parameter group based on the verification results to obtain a backup parameter group.

[0221] The determination module 305 is used to determine the spare parameter set as the final parameter set corresponding to the cross-section of the target I-beam connecting rod.

[0222] The I-beam connecting rod section parameter determination device provided in this embodiment of the invention can execute the I-beam connecting rod section parameter determination method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method. Further functional descriptions of the above modules and units are the same as in the corresponding embodiments described above, and will not be repeated here.

[0223] Figure 12 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

[0224] The following is a detailed reference. Figure 12 The diagram illustrates a structural schematic suitable for implementing an electronic device according to embodiments of the present invention. The electronic device may include a processor (e.g., a central processing unit, graphics processor, etc.) 01, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 02 or a program loaded from a memory 08 into a random access memory (RAM) 03. The RAM 03 also stores various programs and data required for the operation of the electronic device. The processor 01, ROM 02, and RAM 03 are interconnected via a bus 04. An input / output (I / O) interface 05 is also connected to the bus 04.

[0225] Typically, the following devices can be connected to I / O interface 05: input devices 06 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 07 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; memory devices 08 including, for example, magnetic tapes, hard disks, etc.; and communication devices 09. Communication device 09 allows electronic devices to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 12 Electronic devices with various devices are shown, but it should be understood that it is not required to implement or have all of the devices shown, and more or fewer devices may be implemented or have instead.

[0226] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device 09, or installed from a memory 08, or installed from a ROM 02. When the computer program is executed by the processor 01, it performs the functions defined in the method for determining the cross-sectional parameters of the I-beam connecting rod according to embodiments of the present invention.

[0227] Figure 12 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0228] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code. When the software or computer code is accessed and executed by the computer, processor, or hardware, the method for determining the cross-sectional parameters of the I-beam connecting rod shown in the above embodiments is implemented.

[0229] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0230] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for determining the cross-sectional parameters of an I-beam connecting rod, characterized in that, The method includes: Obtain the initialization parameter set corresponding to the cross-section of the target I-beam connecting rod; the initialization parameter set includes multiple initialization parameters; Based on the initialization parameter set, calculate the initial cross-sectional area of ​​the target I-beam connecting rod; based on the initial cross-sectional area of ​​the rod, calculate the initial mass reduction. Based on the initial cross-sectional area of ​​the rod, calculate the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod; Based on the total moment of inertia, calculate the compressive stress in the swing plane and the compressive stress in the vertical swing plane corresponding to the target I-beam connecting rod; wherein, the calculation formula for the compressive stress in the swing plane is: ;in, The length is the center length of the connecting rod's large and small ends. The initial cross-sectional area of ​​the rod. Let be the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the XX direction. Inertial forces of the piston assembly The maximum burst pressure is given by the formula for calculating the compressive stress in the vertical oscillating plane. ; in, This is the minimum length of the side of the connecting rod's large and small end holes. The initial cross-sectional area of ​​the rod. Let be the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the YY direction. Inertial forces of the piston assembly This represents the greatest burst pressure; Based on the compressive stress in the swing plane, the safety factor in the swing plane corresponding to the target I-beam connecting rod is calculated using the following formula: ; ;in, The symmetrical fatigue strength of the material corresponding to the target I-beam connecting rod. For the tensile stress of the connecting rod, The compressive stress is within the oscillating plane. Based on the compressive stress in the vertical swing plane, the safety factor in the vertical swing plane corresponding to the target I-beam connecting rod is calculated using the following formula: ;in, The symmetrical fatigue strength of the material corresponding to the target I-beam connecting rod. For the tensile stress of the connecting rod, The compressive stress is perpendicular to the oscillating plane; Calculate the initial safety factor based on the safety factor in the swing plane and the safety factor in the vertical swing plane; Calculate the contribution of each initialization parameter in the initialization parameter group to the initial mass reduction and the contribution of each initialization parameter to the initial safety factor. Select at least one of the initialization parameters whose quality reduction contribution is greater than a preset contribution threshold and / or whose safety factor contribution is greater than the preset contribution threshold as an updatable core parameter; Based on each of the updatable core parameters, the initialization parameter group is updated to obtain multiple sets of updated parameter groups corresponding to the target I-beam connecting rod; each set of updated parameter groups includes multiple updated parameters. Each of the updated parameter groups is verified, and based on the verification results, each of the updated parameter groups is updated to obtain a backup parameter group; The spare parameter set is determined as the final parameter set corresponding to the cross-section of the rod body in the target I-beam connecting rod; Specifically, based on the spare parameter set, a finite element strength analysis model for the connecting rod is constructed to calculate the strength of the target I-beam connecting rod constructed based on the spare parameter set. Based on the backup parameter set, a buckling analysis model is established to calculate the buckling of the target I-beam connecting rod constructed based on the backup parameter set. Based on the backup parameter set, a finite element strength analysis model of the connecting rod is constructed, and the dynamic oil film thickness corresponding to the target I-beam connecting rod constructed based on the backup parameter set is calculated. Based on the spare parameter set, a link-constrained buckling mode model is constructed, and the buckling mode corresponding to the target I-beam link constructed based on the spare parameter set is calculated; The strength, buckling, dynamic oil film thickness, and buckling mode are all tested to see if they meet the corresponding preset requirements. If the strength, buckling, dynamic oil film thickness and buckling mode all meet the corresponding preset requirements, then the spare parameter set is determined as the final parameter set corresponding to the cross section of the rod in the target I-beam connecting rod. If at least one of the strength, buckling, dynamic oil film thickness, and buckling mode fails to meet the corresponding preset requirements, then based on the detection results, the relevant core parameters that significantly affect the non-compliant indicators are determined from each of the backup parameter groups. Based on the effect direction of the parameters, the associated core parameters in the backup parameter group are adjusted; The target parameter set is obtained when the calculated strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements after calculation and adjustment. The target parameter set is determined as the final parameter set corresponding to the cross-section of the rod in the target I-beam connecting rod.

2. The method according to claim 1, characterized in that, The step of calculating the initial cross-sectional area of ​​the target I-beam connecting member based on the initialization parameter set includes: Based on the initialization parameter set, the initial cross-sectional area of ​​the pole is divided into multiple sub-cross-sectional area regions; Based on each of the sub-cross-sectional area regions, the initial bar cross-sectional area corresponding to the target I-beam connecting bar is calculated.

3. The method according to claim 2, characterized in that, The initial pole cross-sectional area includes multiple sub-cross-sectional area regions; based on the initial pole cross-sectional area, the initial safety factor is calculated, including: Calculate the sub-moment of inertia corresponding to each of the sub-cross-sectional area regions; Based on each of the sub-moments of inertia, calculate the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod. The initial safety factor is calculated based on the total moment of inertia.

4. The method according to claim 1, characterized in that, The step of verifying each of the updated parameter groups and updating each of the updated parameter groups based on the verification results to obtain a backup parameter group includes: Calculate the reduction in update quality and the update safety factor corresponding to each of the aforementioned update parameter groups; Detect whether the update safety coefficient corresponding to each of the update parameter groups meets the preset safety coefficient threshold; If the updated safety coefficient meets the preset safety coefficient threshold, then the updated parameter group is used as a candidate parameter group; The candidate parameter groups are adjusted to obtain the backup parameter groups.

5. A device for determining the cross-sectional parameters of an I-beam connecting rod, characterized in that, The device includes: The acquisition module is used to acquire the initialization parameter set corresponding to the cross-section of the target I-beam connecting rod; the initialization parameter set includes multiple initialization parameters; The calculation module is used to calculate the initial cross-sectional area of ​​the target I-beam connecting rod based on the initialization parameter set; and to calculate the initial mass reduction based on the initial cross-sectional area of ​​the rod. Based on the initial cross-sectional area of ​​the rod, calculate the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod; Based on the total moment of inertia, calculate the compressive stress in the swing plane and the compressive stress in the vertical swing plane corresponding to the target I-beam connecting rod; wherein, the calculation formula for the compressive stress in the swing plane is: ;in, The length is the center length of the connecting rod's large and small ends. The initial cross-sectional area of ​​the rod. Let be the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the XX direction. Inertial forces of the piston assembly The maximum burst pressure is given by the formula for calculating the compressive stress in the vertical oscillating plane. ; in, This is the minimum length of the side of the connecting rod's large and small end holes. The initial cross-sectional area of ​​the rod. Let be the total moment of inertia corresponding to the initial cross-sectional area of ​​the rod in the YY direction. Inertial forces of the piston assembly This represents the greatest burst pressure; Based on the compressive stress in the swing plane, the safety factor in the swing plane corresponding to the target I-beam connecting rod is calculated using the following formula: ; ;in, The symmetrical fatigue strength of the material corresponding to the target I-beam connecting rod. For the tensile stress of the connecting rod, The compressive stress is within the oscillating plane. Based on the compressive stress in the vertical swing plane, the safety factor in the vertical swing plane corresponding to the target I-beam connecting rod is calculated using the following formula: ;in, The symmetrical fatigue strength of the material corresponding to the target I-beam connecting rod. For the tensile stress of the connecting rod, The compressive stress is perpendicular to the oscillating plane; Calculate the initial safety factor based on the safety factor in the swing plane and the safety factor in the vertical swing plane; The first update module calculates the contribution of each initialization parameter in the initialization parameter group to the initial mass reduction and the contribution of each initialization parameter to the initial safety factor; selects at least one initialization parameter whose contribution to mass reduction is greater than a preset contribution threshold and / or whose contribution to safety factor is greater than the preset contribution threshold as an updatable core parameter; updates the initialization parameter group based on each updatable core parameter to obtain multiple sets of updated parameter groups corresponding to the target I-beam connecting rod; each set of updated parameter groups includes multiple updated parameters. The second update module is used to verify each of the update parameter groups and update each of the update parameter groups based on the verification results to obtain a spare parameter group. The determination module is used to determine the spare parameter set as the final parameter set corresponding to the cross-section of the rod body in the target I-beam connecting rod; wherein, based on the spare parameter set, a finite element strength analysis model of the connecting rod is constructed to calculate the strength corresponding to the target I-beam connecting rod constructed based on the spare parameter set; Based on the reserved parameter set, a buckling analysis model is established to calculate the buckling of the target I-beam connecting rod constructed based on the reserved parameter set; based on the reserved parameter set, a finite element strength analysis model of the connecting rod is constructed to calculate the dynamic oil film thickness of the target I-beam connecting rod constructed based on the reserved parameter set; based on the reserved parameter set, a constrained buckling modal model of the connecting rod is constructed to calculate the buckling mode of the target I-beam connecting rod constructed based on the reserved parameter set; it is checked whether the strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements; if the strength, buckling, dynamic oil film thickness, and buckling mode all meet the corresponding preset requirements, then the reserved parameter set is used to determine the buckling mode of the target I-beam connecting rod. Using a parameter set, the final parameter set corresponding to the cross-section of the target I-beam connecting rod is determined. If at least one of the strength, buckling, dynamic oil film thickness, and buckling mode does not meet the corresponding preset requirements, then based on the detection results, the associated core parameters that significantly affect the non-compliant indicators are determined from each of the backup parameter sets. Based on the effect direction of the parameters, the associated core parameters in the backup parameter sets are adjusted until the strength, buckling, dynamic oil film thickness, and buckling mode calculated after adjustment all meet the corresponding preset requirements, thus obtaining the target parameter set. The target parameter set is then determined as the final parameter set corresponding to the cross-section of the target I-beam connecting rod.

6. An electronic device, characterized in that, include: The system includes a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes the computer instructions to perform the method for determining the cross-sectional parameters of the I-beam connecting rod as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to execute the method for determining the cross-sectional parameters of the I-beam connecting rod as described in any one of claims 1 to 4.

8. A computer program product, characterized in that, Includes computer instructions, which are used to cause a computer to execute the method for determining the cross-sectional parameters of the I-beam connecting rod as described in any one of claims 1 to 4.

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