A method and related device for predicting leakage risk in bolted connection structures
By constructing a numerical simulation model of the axle bolt connection structure, various working conditions are simulated, the limit interface displacement parameters and sealant failure index are determined, the accuracy problem of sealing performance evaluation in traditional methods is solved, and reliable prediction of leakage risk and guidance for sealing design are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHAANXI HANDE AXLE CO LTD
- Filing Date
- 2026-02-14
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional methods are insufficient to accurately assess the sealing performance of bolted connections in mining truck axles, making it difficult to objectively predict and accurately assess leakage risks.
By constructing a numerical simulation model of the bolted connection structure, multiple vehicle axle working conditions are simulated to determine the ultimate interface displacement parameters and sealant failure index, and the sealant performance is evaluated to predict leakage risk.
It enables reliable and objective judgment of sealing performance, improves the accuracy of leakage risk prediction, breaks through the dependence on the complex material properties of sealants, and provides clear performance boundaries and positive design basis for sealing design.
Smart Images
Figure CN122088097A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of engineering manufacturing technology, and in particular to a method and related apparatus for predicting leakage risk in bolted connection structures. Background Technology
[0002] Mining trucks, as efficient transportation equipment in mining and engineering construction, rely heavily on their axles as key load-bearing and transmission components, bearing the dual functions of supporting the vehicle body and transmitting power. Axle reducer sealing failure (such as oil leakage) not only compromises the integrity of the vehicle body but can also easily lead to reducer overheating and even complete equipment damage. Given the long maintenance cycle of mining trucks and the potential safety hazards and disruptions caused by malfunctions, resolving axle oil leakage issues has significant engineering safety and economic value.
[0003] However, traditional sealant-based assessments of the sealing performance of bolted connections typically rely on the accurate material properties of the sealant (such as elastic modulus, Poisson's ratio, and tensile strength). Since sealants are large-deformation flexible materials, their material properties are often difficult to measure precisely, making it difficult to accurately characterize their mechanical behavior under complex stress conditions. This limitation makes it difficult to establish effective criteria for seal failure using traditional methods, resulting in the inability to objectively predict and accurately assess the leakage risk of axle bolted connections in practical engineering. Summary of the Invention
[0004] In view of the above problems, this application provides a method and related device for predicting leakage risk of bolted connection structures, the specific solution of which is as follows:
[0005] The first aspect of this application provides a method for predicting leakage risk in bolted connection structures, including:
[0006] Numerical simulation models of pre-built bolted connection structures are used to simulate multiple vehicle-axle working conditions to determine the ultimate interface displacement parameters of the large-area bolted connection interface. The ultimate interface displacement parameters include ultimate slip and / or ultimate opening. The bolted connection structure is the large-area bolted connection structure of the vehicle-axle to be evaluated.
[0007] Determine the sealant failure index of the target sealant for the bolted connection structure, wherein the sealant failure index includes critical slip and / or critical opening.
[0008] Based on the ultimate interface displacement parameters and the sealant failure index, the sealant performance of the target sealant is evaluated, and the leakage risk prediction result of the bolted connection structure is obtained.
[0009] In one possible implementation, the limiting interface displacement parameters include the limiting slip and the limiting opening.
[0010] The numerical simulation model based on the pre-built bolted connection structure simulates multiple vehicle-axle working conditions to determine the ultimate interface displacement parameters of the large-area bolted connection interface, including:
[0011] Multiple vehicle axle working conditions are simulated by changing the displacement constraints and external load settings of the numerical simulation model.
[0012] The simulation yields the slip and opening sets of the large-area bolted connection interface; the slip set includes the slip of the large-area bolted connection interface under multiple vehicle axle conditions, and the opening set includes the opening of the large-area bolted connection interface under multiple vehicle axle conditions.
[0013] The maximum slip amount is selected from the set of slip amounts to obtain the limit slip amount of the large-face bolt connection interface;
[0014] The maximum opening amount is selected from the set of opening amounts to obtain the limit opening amount of the large-face bolt connection interface.
[0015] In one possible implementation, the numerical simulation model based on the pre-built bolted connection structure simulates multiple vehicle-axle working conditions to determine the ultimate interface displacement parameters of the large-area bolted connection interface, and further includes:
[0016] A geometric model of the bolt connection structure was created using 3D modeling software.
[0017] The geometric model is imported into finite element software. By setting material properties for the geometric model, performing mesh generation, and dividing preload elements, a mesh model of the bolt connection structure is established. By setting displacement constraints on the mesh model, applying gravity and external loads, and simulating bolt tightening and load distribution loading conditions, a numerical simulation model of the bolt connection structure is established.
[0018] In one possible implementation, determining the sealant failure index of the target sealant for the bolted connection structure includes:
[0019] Obtain the elongation at break and thickness of the target sealant;
[0020] The maximum tensile amount of the target sealant is calculated using a predefined tensile amount formula; the tensile amount formula is:
[0021] ;
[0022] In the formula for the amount of stretching This represents the maximum tensile strength of the sealant. For sealant thickness, Elongation at break of the sealant;
[0023] The sealant failure index is calculated based on the maximum tensile strength and / or thickness of the target sealant.
[0024] In one possible implementation, the sealant failure indicators include critical slip and critical opening.
[0025] The calculation of the sealant failure index based on the maximum tensile strength and / or thickness of the target sealant includes:
[0026] The critical slip amount of the target sealant is calculated using a predefined slip amount formula; the slip amount formula is predefined based on the geometric relationship between the sealant elongation, sealant thickness, and slip distance.
[0027] The critical opening amount of the target sealant is calculated using a predefined opening amount formula; the opening amount formula is based on a predefined geometric relationship between the sealant stretch and the contact gap.
[0028] In one possible implementation, based on the ultimate interface displacement parameters and the sealant failure index, the sealant performance of the target sealant is evaluated to obtain the leakage risk prediction result of the bolted connection structure, including:
[0029] Based on the limit slip of the large-face bolt connection interface, determine whether the large-face bolt connection interface meets the first risk judgment condition. If so, determine that the large-face bolt connection interface has a first risk. The first risk judgment condition includes the limit slip being greater than the product of the critical slip of the sealant and a preset first coefficient.
[0030] Based on the maximum opening amount of the large-face bolt connection interface, determine whether the large-face bolt connection interface meets the second risk judgment condition. If so, determine that the large-face bolt connection interface has a second risk. The second risk judgment condition includes the maximum opening amount being greater than the product of the critical opening amount of the sealant and a preset second coefficient.
[0031] If the large-area bolted connection interface has at least one of the first risk or the second risk, then the leakage risk prediction result of the bolted connection structure is that there is a leakage risk.
[0032] A second aspect of this application provides a leakage risk prediction device for bolted connection structures, comprising:
[0033] The limit parameter acquisition unit is used to simulate multiple vehicle-axle working conditions based on a pre-built numerical simulation model of the bolted connection structure, and determine the limit interface displacement parameters of the large-area bolted connection interface; the limit interface displacement parameters include the limit slip and / or the limit opening; the bolted connection structure is the large-area bolted connection structure of the vehicle-axle to be evaluated;
[0034] The failure index acquisition unit is used to determine the sealant failure index of the target sealant of the bolt connection structure, wherein the sealant failure index includes critical slip and / or critical opening.
[0035] The risk prediction unit is used to evaluate the sealant performance of the target sealant based on the limit interface displacement parameters and the sealant failure index, and obtain the leakage risk prediction result of the bolted connection structure.
[0036] A third aspect of this application provides a computer program product including computer-readable instructions that, when executed on an electronic device, cause the electronic device to implement the leakage risk prediction method for a bolted connection structure as described in the first aspect or any implementation thereof.
[0037] A fourth aspect of this application provides an electronic device, including at least one processor and a memory connected to the processor, wherein:
[0038] The memory is used to store computer programs;
[0039] The processor is used to execute the computer program so that the electronic device can implement the leakage risk prediction method for bolted connection structures described in the first aspect or any implementation thereof.
[0040] The fifth aspect of this application provides a computer storage medium carrying one or more computer programs, which, when executed by an electronic device, enable the electronic device to perform a method for predicting the leakage risk of a bolted connection structure as described in the first aspect or any implementation thereof.
[0041] Using the above technical solution, this application provides a method and related apparatus for predicting leakage risk of bolted connection structures. Based on a pre-constructed numerical simulation model of the bolted connection structure, multiple axle operating conditions are simulated to determine the ultimate interface displacement parameters of the large-area bolted connection interface. The ultimate interface displacement parameters include ultimate slip and / or ultimate opening. The bolted connection structure is the large-area bolted connection structure of the axle to be evaluated. The sealant failure index of the target sealant in the bolted connection structure is determined, including critical slip and / or critical opening. Based on the ultimate interface displacement parameters and sealant failure index, the sealant performance of the target sealant is evaluated, and the leakage risk prediction result of the bolted connection structure is obtained. It can be seen that this solution, by constructing a numerical simulation model of the large-area bolted connection structure of the axle, simulates various actual axle operating conditions and accurately extracts the ultimate slip and ultimate opening of the connection interface as key mechanical parameters. Simultaneously, based on the basic physical properties of the target sealant, the critical slip and critical opening that lead to the failure of the target sealant are defined and calculated. By comparing the ultimate displacement parameters with the sealant failure index, it is possible to quantitatively assess whether the sealant has failed under shear or tensile conditions under specific working conditions, thereby achieving a reliable and objective judgment on sealing performance and improving the accuracy of leakage risk prediction results for bolted connection structures. Attached Figure Description
[0042] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.
[0043] Figure 1 A flowchart illustrating a method for predicting leakage risk in a bolted connection structure provided in this application;
[0044] Figure 2 A flowchart illustrating another method for predicting leakage risk in bolted connection structures provided in this application;
[0045] Figure 3a A flowchart illustrating another method for predicting leakage risk in bolted connection structures provided in this application;
[0046] Figure 3b An example is provided, showing a schematic diagram of a sealant colloid and its displacement.
[0047] Figure 4 A flowchart illustrating another method for predicting leakage risk in bolted connection structures provided in this application;
[0048] Figure 5 A schematic diagram of a leakage risk prediction device for a bolted connection structure provided in this application;
[0049] Figure 6 This is a schematic diagram of the structure of an electronic device provided in this application. Detailed Implementation
[0050] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.
[0051] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.
[0052] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar elements and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing elements with the same properties in the description of embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of units is not necessarily limited to those units, but may include other units not explicitly listed or inherent to those processes, methods, products, or apparatuses.
[0053] Reference Figure 1 , Figure 1 A flowchart illustrating a leakage risk prediction method for a bolted connection structure provided in this application embodiment is shown below. Figure 1 As shown in the embodiment of this application, a method for predicting leakage risk of a bolted connection structure may include steps S101 to S103, which are described in detail below.
[0054] S101. Based on the pre-constructed numerical simulation model of the bolted connection structure of the large surface of the vehicle axle, simulate multiple vehicle axle working conditions and determine the limit interface displacement parameters of the bolted connection interface.
[0055] In this embodiment, the bolted connection structure is the large-area bolted connection structure of the axle to be evaluated, and the ultimate interface displacement parameters include the ultimate slip and / or the ultimate opening.
[0056] It should be noted that under axle conditions, in the bolted connection structure of the axle's large surface area, the bolted connection contact interface will experience two types of displacement changes: misalignment between the interfaces, i.e., contact slip along the tangential direction of the interface, and opening between the interfaces, i.e., contact gap along the normal direction of the interface. Therefore, the limiting slip is the maximum value of the contact slip along the tangential direction of the bolted connection contact interface under axle conditions. The limiting opening is the maximum value of the contact gap along the normal direction of the bolted connection contact interface under axle conditions.
[0057] S102. Determine the sealant failure index of the target sealant for the bolted connection structure.
[0058] In this embodiment, the sealant failure indicators include critical slip and / or critical opening.
[0059] In this embodiment, the critical slip amount is the critical slip displacement value that the target sealant can withstand in the tangential direction of the bolt connection contact interface without failing, and the critical opening amount is the critical opening displacement value that the target sealant can withstand in the normal direction of the bolt connection contact interface without failing.
[0060] S103. Based on the limit interface displacement parameters and sealant failure index, evaluate the sealant performance of the target sealant and obtain the leakage risk prediction results of the bolted connection structure.
[0061] In this embodiment, when the contact slippage or contact gap at the bolt connection interface exceeds the critical value that the target sealant on the bolt connection interface can withstand, the target sealant will fail. Therefore, by comparing the limit interface displacement parameters and the corresponding sealant failure indicators, it is possible to determine whether there is a risk of failure of the target sealant at the current bolt connection interface, thereby determining the leakage risk prediction result of the bolt connection structure.
[0062] For example, when the limit slip is greater than the critical slip, it indicates that the tangential displacement of the connection interface has exceeded the sealant's tolerance, and there is a risk of seal failure due to shear. When the limit opening is greater than the critical opening, it indicates that the normal displacement of the connection interface has exceeded the sealant's tolerance, and there is a risk of seal failure due to tension.
[0063] Therefore, when the ultimate slip is greater than the critical slip and the ultimate opening is greater than the critical opening, it indicates that the connection structure faces the risk of sealing failure in both the tangential and normal directions, and the overall sealing reliability is not up to standard. In this case, the leakage risk prediction result of the bolted connection structure is that the sealing performance is unqualified.
[0064] As can be seen from the above technical solution, the leakage risk prediction method for bolted connection structures provided in this application constructs a numerical simulation model of the large-area bolted connection structure of an axle, simulates various actual axle working conditions, and accurately extracts the ultimate slip and ultimate opening amounts of the connection interface as key mechanical parameters. Simultaneously, based on the basic physical properties of the target sealant, the critical slip and critical opening amounts leading to sealant failure are defined and calculated. By comparing the ultimate displacement parameters with sealant failure indicators, it is possible to quantitatively predict whether the sealant will experience shear or tensile failure under specific working conditions, thereby improving the accuracy of leakage risk prediction results for bolted connection structures through reliable and objective judgment of sealing performance.
[0065] Furthermore, this solution transforms the complex problem of evaluating the performance of sealant bulk materials into a quantitative analysis problem of macroscopic contact displacement parameters at the interface. This avoids the reliance on fine constitutive parameters of sealant (such as elastic modulus and Poisson's ratio) that are difficult to measure accurately in traditional methods, thus breaking through the bottleneck of simulation modeling and performance prediction of flexible large deformation sealing materials.
[0066] Based on the above embodiments, see Figure 2 , Figure 2 This is a flowchart illustrating another method for predicting leakage risk in a bolted connection structure provided in an embodiment of this application. Figure 2 The following is an example of S101, which describes the specific implementation process for determining the limit interface displacement parameters of the large-area bolted connection interface by simulating multiple vehicle-axle working conditions based on a pre-built numerical simulation model of the bolted connection structure. Figure 2 As shown in the embodiment of this application, a method for predicting leakage risk of a bolted connection structure may include steps S201 to S207, which are described in detail below.
[0067] S201. Use 3D modeling software to create a geometric model of the bolted connection structure.
[0068] S202. Import the geometric model into the finite element software, and establish the mesh model of the bolt connection structure by setting material properties for the geometric model, performing mesh generation, and generating pre-tightening elements.
[0069] S203. By setting displacement constraints on the mesh model, applying gravity and external loads, and simulating bolt tightening and load distribution loading conditions, a numerical simulation model of the bolt connection structure is established.
[0070] S204. Simulate multiple vehicle axle working conditions by changing the displacement constraints and external load settings of the numerical simulation model.
[0071] S205. Simulation yields the slip and opening sets of the large-face bolt connection interface.
[0072] In this embodiment, the slip amount set includes the slip amount of the large-area bolt connection interface under multiple vehicle axle working conditions, and the opening amount set includes the opening amount of the large-area bolt connection interface under multiple vehicle axle working conditions.
[0073] S206. Select the maximum slip from the slip set to obtain the limit slip of the large-face bolt connection interface.
[0074] S207. Select the maximum opening amount from the opening amount set to obtain the limit opening amount of the large-face bolt connection interface.
[0075] As can be seen from the above technical solutions, the leakage risk prediction method for bolted connection structures provided in this application provides key and reliable limit mechanical boundary parameters, namely limit opening amount and limit slip amount, for leakage risk prediction through sealing performance evaluation by establishing, constraining, loading and simulating finite element models of bolted connection structures under multiple working conditions.
[0076] Based on the above embodiments, see Figure 3a , Figure 3a This application provides yet another method for predicting leakage risk in bolted connection structures. Figure 3a This illustrates S102, the specific implementation process for determining the sealant failure index of the target sealant in the bolted connection structure, as follows: Figure 3a As shown in the embodiment of this application, a method for predicting leakage risk of a bolted connection structure may include steps S301 to S304, which are described in detail below.
[0077] S301. Obtain the elongation at break and thickness of the target sealant.
[0078] S302. Calculate the maximum stretch of the target sealant using a predefined stretch formula.
[0079] In this embodiment, the formula for the stretching amount is:
[0080] .
[0081] In the above formula for stretching, This represents the maximum tensile strength of the sealant (in mm). This refers to the thickness of the sealant (in mm). Elongation at break of the sealant (in %).
[0082] It should be noted that the maximum tensile strength of the sealant is the ultimate elongation deformation that the material itself can withstand. When the actual tensile strength of the sealant caused by the displacement (slippage or opening) of the connection interface reaches the maximum tensile strength of the sealant, the sealant fails.
[0083] S303. Calculate the critical slip of the target sealant using a predefined slip formula.
[0084] In this embodiment, the slip formula is predefined based on the geometric relationship between sealant stretch, sealant thickness, and slip distance.
[0085] Figure 3b An example is provided, illustrating the sealant colloid and its displacement. Figure 3b As shown, the lateral tensile length, also known as the sealant stretch, refers to the actual elongation corresponding to the slip distance when tangential slip occurs at the bolt connection interface.
[0086] Specifically, the critical slip value refers to the interface slip distance at which the actual elongation of the sealant reaches its maximum tensile strength due to tangential slip at the bolt connection interface. Based on the geometric relationship between sealant elongation, sealant thickness, and slip value, a slip value formula can be predefined to calculate the critical slip value. It is understandable that when the actual slip distance at the bolt connection interface exceeds this critical slip value, the sealant will fracture due to excessive elongation, thus posing a risk of leakage. Conversely, if the actual slip distance is below this critical slip value, the sealant remains intact, and the interface seal is reliable.
[0087] Furthermore, based on geometric relationships, the relationship between sealant stretch L, sealant thickness t, and slip distance s is as follows:
[0088] ;
[0089] Therefore, the slip formula is as follows:
[0090] .
[0091] in, This represents the critical slip.
[0092] S304. Calculate the critical opening amount of the target sealant using a predefined opening amount formula.
[0093] In this embodiment, the opening amount formula is based on a predefined geometric relationship between the sealant stretch amount and the contact gap.
[0094] like Figure 3b As shown, the gap, also known as the contact gap, refers to the actual interface gap distance corresponding to the opening distance when the bolt connection interface is opened normally.
[0095] Specifically, the critical opening distance refers to the interfacial gap distance at which the actual elongation of the sealant reaches its maximum tensile value when the bolted connection interface undergoes normal opening. Based on the geometric relationship between the sealant's elongation and the interfacial gap, an opening formula can be predefined to calculate the critical opening distance. It is understandable that when the actual opening distance of the bolted connection interface exceeds this critical opening distance, the sealant will fracture due to excessive elongation, thus posing a risk of leakage; conversely, the sealant remains intact, and the interface seal is reliable.
[0096] Furthermore, based on geometric relationships, the relationship between the sealant stretch L and the contact gap c is as follows:
[0097] ;
[0098] Therefore, the formula for the opening is as follows:
[0099] ;
[0100] in, This represents the critical opening.
[0101] In summary, based on S303~304, the maximum tensile strength and thickness of the sealant based on the target sealant are determined, and the sealant failure index is calculated.
[0102] As can be seen from the above technical solutions, the leakage risk prediction method for bolted connection structures provided in this application transforms the failure mechanism of the sealant into clear geometric and mechanical boundary conditions (critical slip and critical opening), and establishes a quantitative evaluation index for sealing performance that does not depend on complex constitutive parameters. Based on easily obtainable basic parameters of the sealant (thickness and elongation at break), the failure threshold of the sealant in the shear and tensile directions is directly derived through geometric relationships, thereby realizing the definition of key evaluation indicators for sealing performance.
[0103] Based on the above embodiments, see Figure 4 , Figure 4 This application provides yet another method for predicting leakage risk in bolted connection structures. Figure 4 This illustrates S103, which details the specific implementation process for evaluating the sealant performance of the target sealant based on the ultimate interface displacement parameters and sealant failure indices, to obtain the leakage risk prediction results for the bolted connection structure. Figure 4 As shown in the embodiment of this application, a method for predicting leakage risk of a bolted connection structure may include steps S401 to S404, which are described in detail below.
[0104] S401. Based on the limit slip of the large-face bolt connection interface, determine whether the large-face bolt connection interface meets the first risk judgment condition. If so, determine that the large-face bolt connection interface has the first risk.
[0105] In this embodiment, the first risk assessment condition includes the product of the limit slip amount and the critical slip amount of the sealant, and optionally, the first coefficient is... .
[0106] That is, if the limiting slip amount satisfy If the leakage is not tangential, it is determined that there is a risk of leakage due to tangential slippage of the interface; otherwise, it is determined that the risk of leakage in that direction is relatively small.
[0107] S402. Based on the limit opening amount of the large-face bolt connection interface, determine whether the large-face bolt connection interface meets the second risk judgment condition. If so, determine that the large-face bolt connection interface has a second risk.
[0108] In this embodiment, the second risk assessment criterion includes the product of the limit opening amount being greater than the critical opening amount of the sealant and a preset second coefficient. Optionally, the second coefficient is equal to the first coefficient, that is... .
[0109] That is, if the limiting opening amount satisfy If the interface is open in the normal direction, it is determined that there is a risk of leakage due to the interface opening; otherwise, the risk of leakage in that direction is determined to be relatively small.
[0110] S403. If there is at least one of the first risk or the second risk at the large bolt connection interface, the leakage risk prediction result of the bolt connection structure is that there is a leakage risk.
[0111] S404. If the bolted connection interface does not have either the first risk or the second risk, the leakage risk prediction result of the bolted connection structure is that there is no leakage risk.
[0112] As can be seen from the above technical solutions, the leakage risk prediction method for bolted connection structures provided in this application embodiment, through... Figure 4 The risk assessment process shown can provide a clear and quantitative evaluation of the performance reliability of sealants under specific working conditions.
[0113] Furthermore, this solution can also calculate the critical slip and critical gap of different sealants and compare their magnitudes. The larger the critical failure index, the lower the risk of seal failure, and vice versa, thereby achieving performance evaluation of different sealants.
[0114] Furthermore, if the sealant performance evaluation results indicate a risk of leakage, the risk of leakage can be reduced by decreasing the sealant thickness or increasing the sealant elongation at break. Thus, by optimizing the key process parameters of the sealant (sealant coating thickness and sealant elongation at break), the positive design of the sealing performance of the large-area bolted connection structure of the vehicle axle can be achieved.
[0115] Therefore, this solution provides clear performance boundaries and positive design basis for the sealing design of axle bolt connection structures. It can effectively guide the selection of sealant and the optimization of coating process parameters, thereby controlling leakage risks in advance during the R&D stage, improving product reliability and service life, and has important engineering practice value.
[0116] The above describes a method for predicting leakage risk in bolted connection structures according to embodiments of this application. The following describes the related apparatus for performing the above-described method for predicting leakage risk in bolted connection structures.
[0117] Please see Figure 5 , Figure 5 This is a structural schematic diagram of a leakage risk prediction device for a bolted connection structure provided in an embodiment of this application. Figure 5 As shown, the leakage risk prediction device 500 for the bolted connection structure includes:
[0118] The limit parameter acquisition unit 501 is used to simulate multiple vehicle-axle working conditions based on a pre-built numerical simulation model of the bolted connection structure, and determine the limit interface displacement parameters of the large-area bolted connection interface; the limit interface displacement parameters include the limit slip and / or the limit opening; the bolted connection structure is the large-area bolted connection structure of the vehicle-axle to be evaluated.
[0119] The failure index acquisition unit 502 is used to determine the sealant failure index of the target sealant of the bolt connection structure. The sealant failure index includes critical slip and / or critical opening.
[0120] The risk prediction unit 503 is used to evaluate the sealant performance of the target sealant based on the limit interface displacement parameters and the sealant failure index, and obtain the leakage risk prediction result of the bolt connection structure.
[0121] In one possible implementation, the limiting interface displacement parameters include the limiting slip and the limiting opening.
[0122] The limit parameter acquisition unit is used to determine the limit interface displacement parameters of the large-area bolted connection interface when simulating multiple vehicle-bridge working conditions based on a pre-built numerical simulation model of the bolted connection structure. Specifically, it is used for:
[0123] Multiple vehicle axle working conditions are simulated by changing the displacement constraints and external load settings of the numerical simulation model.
[0124] The simulation yields the slip and opening sets of the large-area bolted connection interface; the slip set includes the slip of the large-area bolted connection interface under multiple vehicle axle conditions, and the opening set includes the opening of the large-area bolted connection interface under multiple vehicle axle conditions.
[0125] The maximum slip amount is selected from the set of slip amounts to obtain the limit slip amount of the large-face bolt connection interface;
[0126] The maximum opening amount is selected from the set of opening amounts to obtain the limit opening amount of the large-face bolt connection interface.
[0127] In one possible implementation, the limit parameter acquisition unit is used to simulate multiple vehicle-axle working conditions based on a pre-built numerical simulation model of the bolted connection structure. Specifically, when determining the limit interface displacement parameters of the large-area bolted connection interface, it is also used for:
[0128] A numerical model of the bolted connection structure was established using finite element software.
[0129] A mesh model of the bolt connection structure is established by setting material properties for the numerical model, performing mesh generation, and dividing pre-tightening elements.
[0130] By setting displacement constraints on the mesh model, applying gravity and external loads, and simulating bolt tightening and load distribution loading conditions, the numerical simulation model of the bolt connection structure is established.
[0131] In one possible implementation, the failure index acquisition unit is used to determine the sealant failure index of the target sealant in the bolted connection structure, specifically for:
[0132] Obtain the elongation at break and thickness of the target sealant;
[0133] The maximum tensile amount of the target sealant is calculated using a predefined tensile amount formula; the tensile amount formula is:
[0134] ;
[0135] In the formula for the amount of stretching This represents the maximum tensile strength of the sealant. For sealant thickness, Elongation at break of the sealant;
[0136] The sealant failure index is calculated based on the maximum tensile strength and / or thickness of the target sealant.
[0137] In one possible implementation, the sealant failure indicators include critical slip and critical opening.
[0138] The failure index acquisition unit is used to calculate the sealant failure index based on the maximum tensile strength and / or thickness of the target sealant. Specifically, it is used for:
[0139] The critical slip amount of the target sealant is calculated using a predefined slip amount formula; the slip amount formula is predefined based on the geometric relationship between the sealant elongation, sealant thickness, and slip distance.
[0140] The critical opening amount of the target sealant is calculated using a predefined opening amount formula; the opening amount formula is based on a predefined geometric relationship between the sealant stretch and the contact gap.
[0141] In one possible implementation, the risk prediction unit, used to evaluate the sealant performance of the target sealant based on the ultimate interface displacement parameters and the sealant failure index, and to obtain the leakage risk prediction result of the bolted connection structure, is specifically used for:
[0142] Based on the limit slip of the large-face bolt connection interface, determine whether the large-face bolt connection interface meets the first risk judgment condition. If so, determine that the large-face bolt connection interface has a first risk. The first risk judgment condition includes the limit slip being greater than the product of the critical slip of the sealant and a preset first coefficient.
[0143] Based on the maximum opening amount of the large-face bolt connection interface, determine whether the large-face bolt connection interface meets the second risk judgment condition. If so, determine that the large-face bolt connection interface has a second risk. The second risk judgment condition includes the maximum opening amount being greater than the product of the critical opening amount of the sealant and a preset second coefficient.
[0144] If the large-area bolted connection interface has at least one of the first risk or the second risk, then the leakage risk prediction result of the bolted connection structure is that there is a leakage risk.
[0145] This application also provides an electronic device. Figure 6 This application provides a schematic diagram of the structure of an electronic device, with reference to... Figure 6 The diagram illustrates a structural schematic of an electronic device suitable for implementing embodiments of this application. The electronic device in the embodiments of this application may include, but is not limited to, fixed terminals such as mobile phones, laptops, PDAs (personal digital assistants), PADs (tablet computers), and desktop computers. Figure 6 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.
[0146] like Figure 6 As shown, the electronic device may include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage device 608 into a random access memory (RAM) 603. When the electronic device is powered on, the RAM 603 also stores various programs and data required for the operation of the electronic device. The processing unit 601, ROM 602, and RAM 603 are interconnected via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.
[0147] Typically, the following devices can be connected to I / O interface 605: input devices 606 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 607 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 608 including, for example, memory cards, hard drives, etc.; and communication devices 609. Communication device 609 allows electronic devices to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 6 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. More or fewer devices may be implemented or have alternatively.
[0148] This application also provides a computer program product including computer-readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the bolt connection structure leakage risk prediction methods provided in this application.
[0149] This application also provides a computer-readable storage medium carrying one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any of the leakage risk prediction methods for bolted connection structures provided in this application.
[0150] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. In addition, in the device embodiment drawings provided in this application, the connection relationship between modules indicates that they have a communication connection, which can be implemented as one or more communication buses or signal lines.
[0151] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, or it can be implemented by special-purpose hardware including application-specific integrated circuits, special-purpose CPUs, special-purpose memory, special-purpose components, etc. Generally, any function performed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be diverse, such as analog circuits, digital circuits, or special-purpose circuits. However, for this application, software program implementation is more often the preferred implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, training equipment, or network device, etc.) to execute the methods described in the various embodiments of this application.
[0152] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.
[0153] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, training device, or data center to another website, computer, training device, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).
Claims
1. A method of predicting a leakage risk of a bolted joint structure, characterized by, The method comprises: determining limit interface displacement parameters of a large-surface bolt connection interface based on a numerical simulation model of a pre-constructed bolt connection structure, wherein the limit interface displacement parameters comprise a limit slip amount and / or a limit opening amount, and the bolt connection structure is a large-surface bolt connection structure of a vehicle axle to be evaluated; determining a sealant failure index of a target sealant of the bolt connection structure, wherein the sealant failure index comprises a critical slip amount and / or a critical opening amount; evaluating sealant performance of the target sealant based on the limit interface displacement parameters and the sealant failure index, and obtaining a leakage risk prediction result of the bolt connection structure.
2. The bolted structure's leakage risk prediction method according to claim 1, characterized in that, The limit interface displacement parameters comprise a limit slip amount and a limit opening amount. The method of determining limit interface displacement parameters of a large-surface bolt connection interface based on a numerical simulation model of a pre-constructed bolt connection structure comprises: simulating multiple vehicle axle working conditions by changing displacement constraints and external load settings of the numerical simulation model; obtaining a slip amount set and an opening amount set of the large-surface bolt connection interface through simulation, wherein the slip amount set comprises slip amounts of the large-surface bolt connection interface under multiple vehicle axle working conditions, and the opening amount set comprises opening amounts of the large-surface bolt connection interface under multiple vehicle axle working conditions; selecting a maximum slip amount from the slip amount set to obtain a limit slip amount of the large-surface bolt connection interface; selecting a maximum opening amount from the opening amount set to obtain a limit opening amount of the large-surface bolt connection interface.
3. The bolted structure leakage risk prediction method according to claim 2, characterized in that, The method of determining limit interface displacement parameters of a large-surface bolt connection interface based on a numerical simulation model of a pre-constructed bolt connection structure further comprises: establishing a geometric model of the bolt connection structure by using a three-dimensional modeling software; importing the geometric model into a finite element software, and establishing a mesh model of the bolt connection structure by setting material properties of the geometric model, performing mesh division, and dividing pre-tightening units; establishing the numerical simulation model of the bolt connection structure by setting displacement constraints of the mesh model, applying gravity and external loads, and simulating bolt tightening and load distribution loading working conditions.
4. The bolted structure leakage risk prediction method according to Claim 1, characterized by, The method of determining a sealant failure index of a target sealant of the bolt connection structure comprises: obtaining a sealant elongation at break and a sealant thickness of the target sealant; calculating a sealant maximum tensile amount of the target sealant by using a pre-defined tensile amount formula; the tensile amount formula is: ； In the formula for the elongation, is the maximum elongation of the sealant, is the thickness of the sealant, is the elongation at break of the sealant; calculating the sealant failure index based on the sealant maximum tensile amount and / or the sealant thickness of the target sealant.
5. The bolted structure leakage risk prediction method according to claim 4, characterized in that, The sealant failure index comprises a critical slip amount and a critical opening amount. The method of calculating the sealant failure index based on the sealant maximum tensile amount and / or the sealant thickness of the target sealant comprises: calculating a critical slip amount of the target sealant by using a pre-defined slip amount formula; the slip amount formula is pre-defined based on a geometric relationship among sealant tensile amount, sealant thickness, and slip distance. The critical opening amount of the target sealant is calculated using a predefined opening amount formula; the opening amount formula is based on a predefined geometric relationship between the sealant stretch and the contact gap.
6. The bolted structure leakage risk prediction method according to Claim 1, characterized by, The process of evaluating the sealant performance of the target sealant based on the ultimate interface displacement parameters and the sealant failure index, and obtaining the leakage risk prediction result of the bolted connection structure, includes: Based on the limit slip of the large-face bolt connection interface, determine whether the large-face bolt connection interface meets the first risk judgment condition. If so, determine that the large-face bolt connection interface has a first risk. The first risk judgment condition includes the limit slip being greater than the product of the critical slip of the sealant and a preset first coefficient. Based on the maximum opening amount of the large-face bolt connection interface, determine whether the large-face bolt connection interface meets the second risk judgment condition. If so, determine that the large-face bolt connection interface has a second risk. The second risk judgment condition includes the maximum opening amount being greater than the product of the critical opening amount of the sealant and a preset second coefficient. If the large-area bolted connection interface has at least one of the first risk or the second risk, then the leakage risk prediction result of the bolted connection structure is that there is a leakage risk.
7. A bolted structure leakage risk prediction device, characterized by, include: The limit parameter acquisition unit is used to simulate multiple vehicle-axle working conditions based on a pre-built numerical simulation model of the bolted connection structure, and determine the limit interface displacement parameters of the large-area bolted connection interface; the limit interface displacement parameters include the limit slip and / or the limit opening; the bolted connection structure is the large-area bolted connection structure of the vehicle-axle to be evaluated; The failure index acquisition unit is used to determine the sealant failure index of the target sealant of the bolt connection structure, wherein the sealant failure index includes critical slip and / or critical opening. The risk prediction unit is used to evaluate the sealant performance of the target sealant based on the limit interface displacement parameters and the sealant failure index, and obtain the leakage risk prediction result of the bolted connection structure.
8. A computer program product, characterised in that, Includes computer-readable instructions that, when executed on an electronic device, cause the electronic device to implement the leakage risk prediction method for bolted connection structures as described in any one of claims 1 to 6.
9. An electronic device, comprising: It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program to enable the electronic device to implement the leakage risk prediction method for bolted connection structures as described in any one of claims 1 to 6.
10. A computer storage medium, characterized in that The storage medium carries one or more computer programs that, when executed by an electronic device, enable the electronic device to implement the leakage risk prediction method for bolted connection structures as described in any one of claims 1 to 6.