Optimization design method, system, medium and equipment for collision between side column and threshold aluminum beam of automobile

Abstract

The invention discloses an optimization design method, system, medium and equipment for automobile side column collision threshold aluminum beam, and the method comprises the steps: carrying out the collision simulation calculation of an initial side column collision simulation model, and obtaining the displacement and section force curve of a force transmission channel part; a seat cross beam in the vehicle body frame is equivalent to a spring structure, and collision simulation is conducted on the simplified model through displacement and section force curves; calculating the fitting degree of aluminum beam performance between the initial side column collision simulation model and the simplified model in collision simulation, and calculating the total fitting degree of the models; judging whether the total fitting degree of the model reaches the standard or not, and optimizing the simplified model according to a standard reaching result to obtain a target simplified model; and replacing the aluminum beam structures in the target simplified model one by one by using the aluminum beam structures in the aluminum beam library to carry out collision simulation to obtain an optimal aluminum beam scheme. Based on the data processing flow, through a screening mechanism of simplified pre-screening and whole vehicle verification, the technical contradiction of low whole vehicle simulation efficiency and insufficient simplified model precision of the whole scheme is solved.

Description

Technical Field

[0001] This invention relates to the field of automotive body optimization design technology, and in particular to an optimization design method, system, medium and equipment for automotive side pillars hitting door sill aluminum beams. Background Technology

[0002] With increasingly stringent automotive safety regulations regarding side pole impact performance, the aluminum door sill beam, as a critical force-transmitting component, requires a cross-sectional design that balances lightweight design with crashworthiness. Existing designs suffer from the following problems: 1. Low iteration efficiency: Traditional methods require directly substituting the aluminum beam cross-section into the vehicle side pillar collision model for simulation. A single analysis takes 8-12 hours. If more than 10 cross-sections need to be tested, the cycle can be as long as 5-7 days, which is difficult to meet the needs of rapid development.

[0003] 2. Existing technologies generally only focus on the equivalent simplification of the vehicle body frame and do not establish a force-displacement relationship model for the seat crossbeams; at the same time, some technologies focus on the topology optimization of aluminum profiles, lacking a closed-loop design of "simplified pre-screening + whole vehicle verification", and cannot balance efficiency and precision. Summary of the Invention

[0004] This invention provides an optimized design method, system, medium, and equipment for the aluminum beam of a car side pillar hitting the door sill. It constructs a spring model through force-displacement curves to simulate the deformation of the crossbeam, and solves the technical contradiction between "low efficiency of full-solution whole-vehicle simulation" and "insufficient accuracy of simplified model" through a graded screening mechanism of "simplified pre-screening + whole-vehicle verification". Firstly, an optimized design method for the aluminum beam that contacts the door sill of a car side pillar is provided, including: An initial side pole collision simulation model was established based on the vehicle frame. Collision simulation calculations were performed on the initial side pole collision simulation model to obtain the displacement and cross-sectional force curves of the force transmission channel components. The seat crossbeam in the vehicle frame is equivalent to a spring structure, resulting in a simplified aluminum beam spring model including aluminum beams. The displacement and cross-sectional force curves are used to perform collision simulation on the simplified aluminum beam spring model. In the collision simulation, the goodness of fit of the aluminum beam performance between the initial side pillar collision simulation model and the simplified aluminum beam spring model is calculated, and the total goodness of fit of the model is calculated. Determine whether the overall fit of the model meets the standard, and optimize the simplified model of the aluminum beam spring based on the result to obtain the target simplified model; By replacing the aluminum beam structures in the target simplified model one by one with the aluminum beam structures in the aluminum beam library, collision simulation is performed to obtain the optimal aluminum beam scheme.

[0005] In some embodiments, the step of equating the seat crossbeam in the vehicle frame to a spring structure to obtain a simplified aluminum beam spring model including aluminum beams, and using the displacement and cross-sectional force curves to perform collision simulation on the simplified aluminum beam spring model, includes: The seat crossbeam in the vehicle frame is equivalent to a spring structure, resulting in a simplified aluminum beam spring model including aluminum beams. The simplified aluminum beam spring model is counterweighted, and the non-axial motion of the spring structure is constrained. One end of the spring structure is connected to the aluminum beam structure in the vehicle frame, and the free end of the spring structure is coupled to the vehicle's center of gravity. The corresponding curve of the seat beam in the displacement-section force curve is used as the mechanical feature input of the spring structure in the collision simulation calculation of the simplified aluminum beam spring model.

[0006] In some embodiments, the performance indicators of the aluminum beam include: vehicle body intrusion, energy absorption of the aluminum beam, and load distribution ratio of the seat crossbeam; In the collision simulation, the goodness of fit of the aluminum beam performance between the initial side pillar collision simulation model and the simplified aluminum beam spring model is calculated, including: In the collision simulation, the vehicle body intrusion time curve, aluminum beam energy absorption time curve, and seat crossbeam load distribution ratio time curve of the initial side pole collision simulation model are extracted. The vehicle body intrusion time curve, aluminum beam energy absorption time curve, and seat crossbeam load distribution ratio time curve of the simplified aluminum beam spring model are also extracted. Within the curve time length, calculate the proportion of each sampling point of the aluminum beam performance index curve of the simplified aluminum beam spring model falling within the corridor width of the aluminum beam performance index curve corresponding to the initial side column collision simulation model, and then use the proportion as the corresponding aluminum beam performance index fit degree. The method for calculating the overall fit of the model is shown in the following formula:

[0007] In the formula, q is the overall model fit; a is the body intrusion fit; b is the aluminum beam energy absorption fit; and c is the seat beam load distribution fit. , , For weighting coefficients, .

[0008] In some embodiments, determining whether the overall model fit meets the standard, and optimizing the simplified aluminum beam spring model based on the result of meeting the standard to obtain the target simplified model, includes: When the total fitting degree of the model is greater than or equal to the fitting degree threshold, the aluminum beam structure in the target simplified model is replaced one by one by each aluminum beam structure in the aluminum beam library to perform collision simulation. When the total fitting degree of the model is less than the fitting degree threshold, the simplified model of the aluminum beam spring is optimized until the total fitting degree of the optimized simplified model is greater than or equal to the fitting degree threshold, thus obtaining the optimized target simplified model.

[0009] In some embodiments, optimizing the simplified model of the aluminum beam spring includes: Adjust the connection method of the components in the simplified model of the aluminum beam spring; or, Apply degree-of-freedom constraints to the spring structure in the simplified model of the aluminum beam spring; or, In the simplified model of the aluminum beam spring, a side pillar impact component of the vehicle body that has not undergone collision simulation calculation is added, and it is equivalent to or not equivalent to a spring structure.

[0010] In some embodiments, the step of replacing the aluminum beam structures in the target simplified model one by one with the aluminum beam structures in the aluminum beam library to perform collision simulation and obtain the optimal aluminum beam scheme includes: The aluminum beam structures in the target simplified model are replaced one by one using the aluminum beam structures in the aluminum beam library, and collision simulation calculations are performed on each simplified model after replacement. Multiple alternative model schemes are selected based on the collision simulation results. The selected alternative model schemes were placed into the whole vehicle simulation model for verification to obtain the optimal aluminum beam scheme.

[0011] In some embodiments, the selection of multiple alternative model schemes based on collision simulation results includes: Each simplified model after replacement is defined as a replacement model. The peak values ​​of vehicle body intrusion, aluminum beam energy absorption, and seat beam load distribution ratio of each replacement model in the collision simulation are ranked in various aluminum beam performance indicators. The ranking results of each replacement model are multiplied by the weight allocation coefficients corresponding to each aluminum beam performance index, and then summed to obtain the evaluation index score of each replacement model. The n replacement models with the lowest scores on the evaluation index are selected as alternative model schemes.

[0012] Secondly, an optimized design system for the aluminum beam that contacts the side pillar of a car door sill is provided, including: The initial model simulation module is used to establish an initial side pole collision simulation model based on the vehicle frame, perform collision simulation calculations on the initial side pole collision simulation model, and obtain the displacement and cross-sectional force curves of the force transmission channel components. The model simplification simulation module is communicatively connected to the initial model simulation module. It is used to convert the seat crossbeam in the vehicle frame into an equivalent spring structure, thereby obtaining a simplified aluminum beam spring model including aluminum beams. The displacement and cross-sectional force curves are used to perform collision simulation on the simplified aluminum beam spring model. The aluminum beam performance fitting module is communicatively connected to the model simplification simulation module. It is used to calculate the degree of fit of the aluminum beam performance between the initial side column collision simulation model and the simplified aluminum beam spring model in the collision simulation, and to calculate the total degree of fit of the model. The optimization module, communicatively connected to the aluminum beam performance fitting module, is used to determine whether the overall model fit meets the standard, and optimizes the simplified aluminum beam spring model based on the result to obtain the target simplified model; and, The replacement simulation module is communicatively connected to the judgment and optimization module. It is used to replace the aluminum beam structure in the target simplified model one by one with each aluminum beam structure in the aluminum beam library to perform collision simulation and obtain the optimal aluminum beam scheme.

[0013] Thirdly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the optimized design method for the aluminum beam of the car side pillar hitting the door sill as described above.

[0014] Compared with the prior art, the advantages of the present invention are as follows: 1. Equivalent method of dynamic stiffness spring for seat crossbeam: Unlike the traditional linear spring simplification, a stiffness spring model is constructed by fitting F-Δ curve polynomial to simulate the deformation of the crossbeam.

[0015] 2. The accuracy of the simplified model is ensured by calculating the weighted goodness of fit using key indicators.

[0016] 3. A hierarchical screening mechanism of “simplified pre-screening + whole vehicle verification”: a two-step method is proposed to first screen in batches using low-complexity models and then verify accurately using high-fidelity models, so as to solve the technical contradiction between “low efficiency of whole vehicle simulation of the whole solution” and “insufficient accuracy of simplified models”.

[0017] 4. Multi-parameter quantitative evaluation system for aluminum beam sections: By linking parameters such as bending stiffness, shear strength, and energy absorption with simulation indicators, a quantifiable screening standard is established to avoid the reliance on experience in traditional design. Attached Figure Description

[0018] Figure 1 This is a schematic flowchart of an embodiment of the optimized design method for an aluminum beam that touches the door sill of a car according to the present invention; Figure 2 This is a schematic diagram of the initial side-pillar collision simulation model structure of the present invention; Figure 3 This is a simplified model structural diagram of the aluminum beam spring of the present invention; Figure 4 This is a schematic diagram of the vehicle body intrusion fitting degree of the present invention; Figure 5This is a schematic flowchart of another embodiment of the optimized design method for the aluminum beam that hits the door sill of a car side pillar according to the present invention. Detailed Implementation

[0019] Referring now to specific embodiments of the invention, examples of which are illustrated in the accompanying drawings. Although the invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the invention to the described embodiments. Rather, it is intended to cover variations, modifications, and equivalents included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of both.

[0020] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Note: The examples described below are merely specific examples and are not intended to limit the embodiments of the present invention to the specific steps, values, conditions, data, order, etc. Those skilled in the art can utilize the concept of the present invention to construct more embodiments not mentioned herein by reading this specification.

[0022] Please see Figure 1 The present invention provides a flowchart illustrating an optimized design method for an aluminum beam that contacts the door sill of a car side pillar. The method includes: Step S100: Establish an initial side pole collision simulation model based on the vehicle frame, perform collision simulation calculations on the initial side pole collision simulation model, and obtain the displacement and cross-sectional force curves of the force transmission channel components.

[0023] Specifically, in this embodiment of the invention, a preliminary aluminum beam collision simulation is performed on the determined vehicle body frame (including the B-pillar, floor, seat crossbeams, etc.), that is, an initial side pole collision simulation model is established. See details below. Figure 2 As shown, this is a crash simulation performed on a full-vehicle. The simulation results need to output the displacement and cross-sectional force curves of the main force transmission channels within the vehicle frame. The main force transmission channels include: B-pillar, floor, seat crossbeams, door structure, A-pillar and C-pillar, side beams and side impact beams. This data is used for subsequent calibration and optimization design to ensure that the vehicle structure can effectively transmit impact forces and maintain good deformation control during a collision.

[0024] Step S200: The seat crossbeam in the vehicle frame is equivalent to a spring structure, resulting in a simplified aluminum beam spring model including aluminum beams. Collision simulation is then performed on the simplified aluminum beam spring model using the displacement and cross-sectional force curves, including: The seat crossbeam in the vehicle frame is equivalent to a spring structure, resulting in a simplified aluminum beam spring model including aluminum beams. The simplified aluminum beam spring model is counterweighted, and the non-axial motion of the spring structure is constrained. One end of the spring structure is connected to the aluminum beam structure in the vehicle frame, and the free end of the spring structure is coupled to the vehicle's center of gravity. The corresponding curve of the seat beam in the displacement-section force curve is used as the mechanical feature input of the spring structure in the collision simulation calculation of the simplified aluminum beam spring model.

[0025] Specifically, in this embodiment of the invention, based on the spatial position of the actual vehicle body frame, the seat crossbeams in the vehicle body frame are equivalent to spring structures, resulting in a simplified aluminum beam spring model including aluminum beams. This is to reduce computational complexity and facilitate rapid simulation calculations to simulate the mechanical behavior of the aluminum beams in a collision. See details... Figure 3 As shown.

[0026] The equivalent principle of the seat crossbeam spring is as follows: During a side pole impact, the seat crossbeam mainly bears axial compressive load, and the force direction is unidirectional. The force transmission characteristics of the crossbeam can be simulated by calibrating a nonlinear spring. Specifically, the force-displacement curve parameters of the crossbeam section in the vehicle collision model are obtained and input, and then calibrated using a nonlinear spring material model in Ls-Dyna. In this case, the spring can approximately simulate the load transmission characteristics of the crossbeam, and the error can be controlled within an acceptable range. Ls-Dyna is a finite element analysis software commonly used for collision simulation. It can simulate complex collision processes and predict the performance of the vehicle body structure under impact. In simulations, springs are often used to represent the mechanical behavior of vehicle body parts, especially the elastic and plastic deformation under external forces. Nonlinear spring materials can describe nonlinear mechanical behavior, meaning that the relationship between force and displacement is no longer a simple linear relationship but varies with the degree of deformation. In Ls-Dyna, calibration refers to adjusting the parameters of the material model by inputting measured or simulated data, so that the simulation model's performance is as close as possible to the actual physical experimental results. In this invention, the calibration process adjusts the parameters of the nonlinear spring model based on the displacement and cross-sectional force curves calculated from the initial side-column collision simulation model of the crossbeam, ensuring that the simulation results accurately reflect the performance of the crossbeam in the collision.

[0027] In order to prevent the spring element from slipping during the spring simulation, the non-axial motion of the spring can be constrained, that is, by establishing SPC (Single Point Constraint) to constrain the non-axial displacement or by establishing a cylindrical hinge.

[0028] Step S300: Calculate the fit degree of the aluminum beam performance between the initial side pillar collision simulation model and the simplified aluminum beam spring model in the collision simulation, and calculate the total fit degree of the model. Specifically, in this embodiment of the invention, the performance indicators of the aluminum beam include: vehicle body intrusion, energy absorption of the aluminum beam, and load distribution ratio of the seat crossbeam; In the collision simulation, the goodness of fit of the aluminum beam performance between the initial side pillar collision simulation model and the simplified aluminum beam spring model is calculated, including: In the collision simulation, the vehicle body intrusion time curve, aluminum beam energy absorption time curve, and seat crossbeam load distribution ratio time curve of the initial side pole collision simulation model are extracted. The vehicle body intrusion time curve, aluminum beam energy absorption time curve, and seat crossbeam load distribution ratio time curve of the simplified aluminum beam spring model are also extracted. Within the curve time length, the proportion of each sampling point of the aluminum beam performance index curve of the simplified aluminum beam spring model falling within the corridor width of the aluminum beam performance index curve corresponding to the initial side pillar collision simulation model is calculated. The proportion is then used as the corresponding aluminum beam performance index fitting degree. Therefore, the fitting degree of vehicle body intrusion, aluminum beam energy absorption, and seat beam load distribution can be obtained according to the vehicle body intrusion amount time curve, aluminum beam energy absorption time curve, and seat beam load distribution ratio time curve, respectively.

[0029] See details Figure 4 As shown, the solid black line is the time curve of the vehicle body intrusion of the initial side pillar collision simulation model, the dashed line is the time curve of the vehicle body intrusion of the simplified aluminum beam spring model, and the gray area is the corridor width of the vehicle body intrusion. The vehicle body intrusion fitting degree is the proportion of the dashed line falling within the gray area over the entire time length, which can be used to obtain the vehicle body intrusion fitting degree.

[0030] The curve duration is typically 70ms, and all curves have the same sampling frequency, with a sampling period of 0.1ms. Within the 0~70ms timeframe, the percentage of each sampling point on the simplified model performance index curve that falls within the corridor width of the corresponding performance curve in the initial side-pillar collision simulation model is calculated. The corridor width is ±5% of the curve range.

[0031] The method for calculating the overall fit of the model is shown in the following formula:

[0032] In the formula, q is the overall model fit; a is the body intrusion fit; b is the aluminum beam energy absorption fit; and c is the seat beam load distribution fit. , , For weighting coefficients, The weighting coefficients can be adjusted based on the vehicle body development strategy. , , .

[0033] Step S400: Determine whether the overall fit of the model meets the standard, and optimize the simplified model of the aluminum beam spring based on the standard result to obtain the target simplified model, including: When the total fitting degree of the model is greater than or equal to the fitting degree threshold, the aluminum beam structure in the target simplified model is replaced one by one by each aluminum beam structure in the aluminum beam library to perform collision simulation. When the total fitting degree of the model is less than the fitting degree threshold, the simplified model of the aluminum beam spring is optimized until the total fitting degree of the optimized simplified model is greater than or equal to the fitting degree threshold, thus obtaining the optimized target simplified model.

[0034] Specifically, in this embodiment of the invention, when the total fit q ≥ 0.65, the model correlation is considered to be up to standard, and further optimization analysis can be performed.

[0035] When the overall goodness of fit q < 0.65, the model is considered to have poor correlation, and the simplified model of the aluminum beam spring needs to be optimized. The optimization of the simplified model of the aluminum beam spring includes: Adjust the connection method of the components in the simplified model of the aluminum beam spring, such as changing the rigid connection to welding, or adding a flexible transition; or, Apply freedom constraints to the spring structure in the simplified aluminum beam spring model to make its mechanical behavior more closely resemble that of an actual seat crossbeam; or, In the simplified model of the aluminum beam spring, a side pillar impact component of the vehicle body that has not undergone collision simulation calculation is added, and it is either equivalent to or not equivalent to a spring structure. In other words, a component that has a significant impact on the results is added, and it is either simplified or not simplified.

[0036] Step S500: Replace the aluminum beam structures in the target simplified model one by one with the aluminum beam structures in the aluminum beam library to perform collision simulation and obtain the optimal aluminum beam scheme, including: Step S510: Replace the aluminum beam structures in the target simplified model one by one using the aluminum beam structures in the aluminum beam library, and perform collision simulation calculations on each simplified model after replacement. Based on the collision simulation results, select multiple alternative model schemes, including: Each simplified model after replacement is defined as a replacement model. The peak values ​​of vehicle body intrusion, aluminum beam energy absorption, and seat beam load distribution ratio of each replacement model in the collision simulation are ranked in various aluminum beam performance indicators. The ranking results of each replacement model are multiplied by the weight allocation coefficients corresponding to each aluminum beam performance index, and then summed to obtain the evaluation index score of each replacement model. The n replacement models with the lowest scores on the evaluation index are selected as alternative model schemes.

[0037] Specifically, in this embodiment of the invention, the weight allocation coefficient is first determined to be... =0.7、 =0.1、 =0.2; then multiply the ranking results of each replacement model by its weight and sum them to obtain the evaluation index score, and take the three lowest evaluation index values ​​as the candidate model schemes. See Table (1) below for details: Table (1)

[0038] As can be seen from Table (1), the three alternative model schemes are aluminum beam 1, 2 and 4.

[0039] Step S520: The selected alternative model schemes are placed into the vehicle simulation model for verification to obtain the optimal aluminum beam scheme. The three optimal schemes can be substituted into the vehicle model for calculation, and the aluminum beam that meets the vehicle performance development requirements and uses the least amount of material is selected as the final optimal aluminum beam scheme.

[0040] See also Figure 5 As shown, this embodiment of the invention provides an optimized design method for the aluminum beam that contacts the door sill of a car side pillar, including the following steps: 1. Establish an initial side pole collision simulation model based on the vehicle frame, perform collision simulation calculations on the initial side pole collision simulation model, and obtain the displacement and cross-sectional force curves of the force transmission channel components; 2. Based on the actual spatial position of the vehicle body frame, establish a simplified model of the aluminum beam spring and set collision conditions.

[0041] 3. Assign the force-displacement curve output from the initial side-pillar collision simulation model to the corresponding spring component.

[0042] 4. Add counterweights to the simplified model of the aluminum beam spring to adjust its mass and center of gravity to match those of the entire vehicle.

[0043] 5. In the collision simulation, calculate the goodness of fit of the aluminum beam performance between the initial side pillar collision simulation model and the simplified aluminum beam spring model, and calculate the overall goodness of fit of the model.

[0044] 6. Determine whether the overall model fit meets the standard, and optimize the simplified model of the aluminum beam spring based on the result to obtain the target simplified model; 7. Replace the aluminum beam structure in the target simplified model one by one with each aluminum beam structure in the aluminum beam library to perform collision simulation and obtain the optimal aluminum beam scheme.

[0045] In summary, the present invention has the following beneficial effects: 1. Equivalent method of dynamic stiffness spring for seat crossbeam: Unlike the traditional linear spring simplification, a stiffness spring model is constructed by fitting F-Δ curve polynomial to simulate the deformation of the crossbeam.

[0046] 2. The accuracy of the simplified model is ensured by calculating the weighted goodness of fit using key indicators.

[0047] 3. A hierarchical screening mechanism of “simplified pre-screening + whole vehicle verification”: a two-step method is proposed to first screen in batches using low-complexity models and then verify accurately using high-fidelity models, so as to solve the technical contradiction between “low efficiency of whole vehicle simulation of the whole solution” and “insufficient accuracy of simplified models”.

[0048] 4. Multi-parameter quantitative evaluation system for aluminum beam sections: By linking parameters such as bending stiffness, shear strength, and energy absorption with simulation indicators, a quantifiable screening standard is established to avoid the reliance on experience in traditional design.

[0049] This invention also provides an optimized design system for the aluminum beam that contacts the door sill of a car side pillar, including: The initial model simulation module is used to establish an initial side pole collision simulation model based on the vehicle frame, perform collision simulation calculations on the initial side pole collision simulation model, and obtain the displacement and cross-sectional force curves of the force transmission channel components. The model simplification simulation module is communicatively connected to the initial model simulation module. It is used to convert the seat crossbeam in the vehicle frame into an equivalent spring structure, thereby obtaining a simplified aluminum beam spring model including aluminum beams. The displacement and cross-sectional force curves are used to perform collision simulation on the simplified aluminum beam spring model. The aluminum beam performance fitting module is communicatively connected to the model simplification simulation module. It is used to calculate the degree of fit of the aluminum beam performance between the initial side column collision simulation model and the simplified aluminum beam spring model based on the ISO DTS standard, and to calculate the total degree of fit of the model. The optimization module, communicatively connected to the aluminum beam performance fitting module, is used to determine whether the overall model fit meets the standard, and optimizes the simplified aluminum beam spring model based on the result to obtain the target simplified model; and, The replacement simulation module is communicatively connected to the judgment and optimization module. It is used to replace the aluminum beam structure in the target simplified model one by one with each aluminum beam structure in the aluminum beam library to perform collision simulation and obtain the optimal aluminum beam scheme.

[0050] In summary, the main advantages of this invention are as follows: 1. Efficiency Improvement: The simplified model simulation time is only 0.5-1.0 hours per set, which is 8-10 times more efficient than the whole vehicle model (8-12 hours per set). The analysis cycle of 90 sets of solutions is shortened from 7 days to 1.5 days; a single development can save 40,000 yuan in costs. 2. Accuracy Guarantee: By calculating the goodness of fit of key indicators, the correlation between the simplified model and the original simulation model can be improved, ensuring that the accuracy loss during the simplification process is not too high.

[0051] 3. High versatility: Applicable to the side pillar impact aluminum beam design of different models (sedans, SUVs, MPVs), only the spring fitting parameters and aluminum beam cross-section range need to be adjusted, without extensive reconstruction of the model framework.

[0052] Specifically, this embodiment corresponds one-to-one with the above method embodiments. The functions of each module have been described in detail in the corresponding method embodiments, so they will not be repeated here.

[0053] Based on the same inventive concept, embodiments of this application also provide a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements all or part of the method steps of the above method.

[0054] The present invention can implement all or part of the processes in the above methods, or it can be accomplished by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0055] Based on the same inventive concept, embodiments of this application also provide an electronic device, including a memory and a processor. The memory stores a computer program that runs on the processor. When the processor executes the computer program, it implements all or part of the method steps described above.

[0056] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the computer device, connecting all parts of the computer device through various interfaces and lines.

[0057] Memory can be used to store computer programs and / or modules. The processor performs various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and by accessing data stored in the memory. Memory can primarily include a program storage area and a data storage area. The program storage area can store the operating system and at least one application program required for a function (e.g., sound playback, image playback, etc.); the data storage area can store data created based on the use of the mobile phone (e.g., audio data, video data, etc.). Furthermore, memory can include high-speed random access memory, and can also include non-volatile memory, such as hard disks, RAM, plug-in hard disks, SmartMedia Cards (SMC), Secure Digital (SD) cards, Flash Cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0058] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, servers, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0059] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), servers, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0060] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0061] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0062] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An optimization design method of an automobile side column impact door sill aluminum beam, characterized in that, The method comprises the following steps: An initial side impact simulation model is established based on a vehicle body frame, and a displacement and cross-sectional force curve of a force transmission path component is obtained by performing a collision simulation calculation on the initial side impact simulation model; A seat cross beam in the vehicle body frame is equivalent to a spring structure to obtain an aluminum beam spring simplified model including an aluminum beam, and a collision simulation is performed on the aluminum beam spring simplified model by using the displacement and cross-sectional force curve. A fitting degree of aluminum beam performance between the initial side impact simulation model and the aluminum beam spring simplified model is calculated in the collision simulation, and a total fitting degree of the model is calculated. It is judged whether the total fitting degree of the model meets the standard, and the aluminum beam spring simplified model is optimized according to the result of meeting the standard to obtain a target simplified model. Each aluminum beam structure in an aluminum beam library is used to replace the aluminum beam structure in the target simplified model to perform a collision simulation, and an optimal aluminum beam scheme is obtained.

2. The method of optimizing the design of an automotive side impact door sill aluminum beam according to claim 1, wherein, The step of equivalent the seat cross beam in the vehicle body frame to the spring structure to obtain the aluminum beam spring simplified model including the aluminum beam, and performing the collision simulation on the aluminum beam spring simplified model by using the displacement and cross-sectional force curve comprises the following steps: The seat cross beam in the vehicle body frame is equivalent to the spring structure to obtain the aluminum beam spring simplified model including the aluminum beam, and a counterweight is arranged on the aluminum beam spring simplified model, and a non-axial movement of the spring structure is constrained; one end of the spring structure is connected to an aluminum beam structure in the vehicle body frame, and a free end of the spring structure is coupled to a vehicle mass center; Corresponding curves of the seat cross beam in the displacement and cross-sectional force curve are used as mechanical characteristic inputs of the spring structure in the collision simulation calculation of the aluminum beam spring simplified model.

3. The optimization design method of the automobile side impact door sill aluminum beam according to claim 1, wherein the aluminum beam performance indicators comprise a vehicle body intrusion amount, an aluminum beam energy absorption amount, and a seat cross beam load distribution ratio. The fitting degree of the aluminum beam performance between the initial side impact simulation model and the aluminum beam spring simplified model is calculated in the collision simulation, and the fitting degree comprises the following steps: In the collision simulation, a vehicle body intrusion amount time curve, an aluminum beam energy absorption amount time curve, and a seat cross beam load distribution ratio time curve of the initial side impact simulation model are extracted, and a vehicle body intrusion amount time curve, an aluminum beam energy absorption amount time curve, and a seat cross beam load distribution ratio time curve of the aluminum beam spring simplified model are extracted; In a curve time length, a proportion of each sampling point of an aluminum beam performance indicator curve of the aluminum beam spring simplified model falling within a corresponding aluminum beam performance indicator curve corridor width of the initial side impact simulation model is calculated, and the proportion is used as a fitting degree of the corresponding aluminum beam performance indicator; The method for calculating the total fitting degree of the model is shown in the following formula: The method for judging whether the total fitting degree of the model meets the standard and optimizing the aluminum beam spring simplified model according to the result of meeting the standard to obtain a target simplified model comprises the following steps: ； where q is the total model fit; a is the body intrusion fit; b is the aluminum beam energy absorption fit; and c is the seat beam load distribution fit. , , is a weight distribution coefficient, .

4. The method of optimizing the design of an automotive side impact door sill aluminum beam of claim 1, wherein, When the total fitting degree of the model is greater than or equal to a fitting degree threshold, each aluminum beam structure in an aluminum beam library is used to replace the aluminum beam structure in the target simplified model to perform a collision simulation. ​ When the total fitting degree of the model is less than the fitting degree threshold, the aluminum beam spring simplified model is optimized until the total fitting degree of the optimized simplified model is greater than or equal to the fitting degree threshold, and an optimized target simplified model is obtained.

5. The method of optimizing the design of an automotive side impact door sill aluminum beam according to any one of claims 1, 4, wherein, The optimization of the aluminum beam spring simplified model comprises: adjusting the connection mode of components in the aluminum beam spring simplified model; or, applying a degree of freedom constraint to the spring structure in the aluminum beam spring simplified model; or, adding a vehicle body side column collision component that is not subjected to collision simulation calculation in the aluminum beam spring simplified model, and equivalently or inequivalently converting the component into a spring structure.

6. The method of optimizing the design of an automotive side impact door sill aluminum beam of claim 1, wherein, The aluminum beam library comprises: each aluminum beam structure in the aluminum beam library is used to replace the aluminum beam structure in the target simplified model one by one to perform collision simulation, and an optimal aluminum beam scheme is obtained. each aluminum beam structure in the aluminum beam library is used to replace the aluminum beam structure in the target simplified model one by one, and each simplified model after replacement is subjected to collision simulation calculation, and a plurality of alternative model schemes are selected according to the collision simulation results; 7. The method of optimizing the design of an automotive side impact door sill aluminum beam of claim 6, wherein, the selected plurality of alternative model schemes are respectively placed into a whole vehicle simulation model for verification, and an optimal aluminum beam scheme is obtained. The selection of the plurality of alternative model schemes according to the collision simulation results comprises: each simplified model after replacement is defined as a replacement model, and the peak value of the vehicle body intrusion, the peak value of the aluminum beam energy absorption, and the peak value of the seat cross beam load distribution ratio of each replacement model in the collision simulation are ranked in each aluminum beam performance index; each ranking result of each replacement model is multiplied by the weight distribution coefficient corresponding to each aluminum beam performance index, and then added, to obtain an evaluation index score of each replacement model; 8. An optimized design system of an automobile side pillar impact door sill aluminum beam, characterized by, n replacement models with the lowest evaluation index scores are selected as alternative model schemes. It comprises: an initial model simulation module, configured to establish an initial side column collision simulation model based on a vehicle body frame, perform collision simulation calculation on the initial side column collision simulation model, and obtain a displacement and cross-sectional force curve of a force transmission channel component; a model simplification simulation module, in communication connection with the initial model simulation module, configured to equivalently convert a seat cross beam in the vehicle body frame into a spring structure, obtain an aluminum beam spring simplified model comprising an aluminum beam, and perform collision simulation on the aluminum beam spring simplified model by using the displacement and cross-sectional force curve; an aluminum beam performance fitting module, in communication connection with the model simplification simulation module, configured to calculate a fitting degree of aluminum beam performance between the initial side column collision simulation model and the aluminum beam spring simplified model in the collision simulation, and calculate a total fitting degree of the model; a judgment optimization module, in communication connection with the aluminum beam performance fitting module, configured to judge whether the total fitting degree of the model meets the standard, and optimize the aluminum beam spring simplified model according to the judgment result to obtain a target simplified model; and 9. A computer readable storage medium having stored thereon a computer program, characterized in that, a replacement simulation module, in communication connection with the judgment optimization module, configured to use each aluminum beam structure in an aluminum beam library to replace the aluminum beam structure in the target simplified model one by one to perform collision simulation, and obtain an optimal aluminum beam scheme. The computer program is executed by a processor to implement the optimization design method of the automobile side column collision door sill aluminum beam according to any one of claims 1 to 7. The computer program is executed by a processor to implement the optimization design method of the automobile side column collision door sill aluminum beam according to any one of claims 1 to 7.

10. An electronic device comprising a storage medium, a processor, and a computer program stored in the storage medium and operable on the processor, characterized in that, The processor realizes the optimal design method of the automobile side column impact door sill aluminum beam as claimed in any one of claims 1 to 7 when running the computer program.

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