Fatigue analysis method and device, storage medium and computer equipment

Abstract

The embodiment of the invention provides a fatigue analysis method and device, a storage medium and computer equipment. The method comprises the following steps: inputting an obtained part assembly digital-analog into a finite element processing model to generate a result file; calculating according to the result file to generate a finite element output result, the finite element output result comprising unit round jump stress; inputting a finite element output result into a fatigue analysis model to correct the equivalent round jump; the corrected equivalent wheel jump stress and the corrected unit wheel jump stress are calculated, and a damage value corresponding to each position in the part assembly is generated; and performing fatigue analysis according to the damage value corresponding to each position to determine the cracking risk. According to the technical scheme provided by the embodiment of the invention, the fatigue life of the part under the road spectrum load can be accurately evaluated, and the accuracy of fatigue life evaluation is improved.

Description

[Technical field]

[0001] The present invention relates to the field of simulation technology, and in particular to a fatigue analysis method, device, storage medium and computer equipment. [Background technology]

[0002] In the fatigue life assessment of automotive parts, road spectrum fatigue damage analysis is a crucial link. The traditional method is usually to linearly superimpose the finite element stress results of the unit load under the road spectrum load after rain flow statistics to predict the cumulative damage of the parts under the road spectrum load. However, this method has obvious limitations in practical applications. For automotive parts such as leaf spring assemblies, shock absorber assemblies, stabilizer bar assemblies, etc., the above method cannot effectively reflect their actual damage under the road spectrum load, which may lead to deviations in fatigue life assessment. [Summary of the invention]

[0003] In view of this, an embodiment of the present invention provides a fatigue analysis method, apparatus, storage medium and computer equipment to accurately evaluate the fatigue life of components under road spectrum loads, thereby improving the accuracy of fatigue life evaluation.

[0004] In one aspect, an embodiment of the present invention provides a fatigue analysis method, comprising:

[0005] Input the acquired component assembly digital model into the finite element processing model to generate a result file;

[0006] Perform calculation according to the result file to generate finite element output results, wherein the finite element output results include unit runout stress;

[0007] Inputting the finite element output result into a fatigue analysis model to correct equivalent wheel jump;

[0008] Calculating the corrected equivalent wheel runout and the unit wheel runout stress to generate a damage value corresponding to each position in the component assembly;

[0009] A fatigue analysis is performed based on the damage value corresponding to each position to determine the risk of cracking.

[0010] Optionally, the step of inputting the acquired component assembly digital model into a finite element processing model to generate a result file includes:

[0011] Input the acquired component assembly digital model into the finite element pre-processing model for pre-processing to generate a mesh file;

[0012] The grid file is input into a finite element processing model for finite element simulation to generate a result file, wherein the result file includes step length, Z-direction displacement, maximum principal stress and hard point support reaction force.

[0013] Optionally, performing calculation according to the result file to generate finite element output results includes:

[0014] Calculate the unit runout stress or unit load stress corresponding to each of the step length, the Z-direction displacement, the maximum principal stress and the hard point support reaction force according to the step length, the Z-direction displacement, the maximum principal stress and the hard point support reaction force;

[0015] Calculating wheel runout according to the Z-direction displacement;

[0016] The basic jump stress set in the result file is selected for jump, and the correction amount and equivalent jump of each basic jump stress are generated.

[0017] Optionally, inputting the finite element output result into a fatigue analysis model to correct equivalent wheel jump includes:

[0018] Based on the fatigue analysis model, the equivalent wheel jump is corrected according to the wheel jump in the finite element output result.

[0019] Optionally, the calculating the corrected equivalent wheel runout and the unit wheel runout stress to generate a damage value corresponding to each position in the component assembly includes:

[0020] The corrected equivalent wheel runout and the unit wheel runout stress are calculated based on the road spectrum load correction model to generate a damage value corresponding to each position in the component assembly.

[0021] Optionally, performing fatigue analysis according to the damage value corresponding to each position to determine the cracking risk includes:

[0022] When the damage value is greater than a set damage threshold, there is a risk of cracking at the position corresponding to the damage value.

[0023] Optionally, the component assembly digital model includes a nonlinear component assembly digital model.

[0024] On the other hand, an embodiment of the present invention provides a fatigue analysis device, comprising:

[0025] The first generation module is used to input the acquired component assembly digital model into the finite element processing model to generate a result file;

[0026] A second generating module is used to perform calculation according to the result file to generate a finite element output result, wherein the finite element output result includes a unit runout stress;

[0027] A correction module, used for inputting the finite element output result into a fatigue analysis model to correct the equivalent wheel jump;

[0028] A third generation module is used to calculate the corrected equivalent wheel runout and the unit wheel runout stress to generate a damage value corresponding to each position in the component assembly;

[0029] The fatigue analysis module is used to perform fatigue analysis according to the damage value corresponding to each position to determine the risk of cracking.

[0030] On the other hand, an embodiment of the present invention provides a storage medium, which includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above fatigue analysis method.

[0031] On the other hand, an embodiment of the present invention provides a computer device, including a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, wherein the program instructions implement the steps of the above-mentioned fatigue analysis method when loaded and executed by the processor.

[0032] In the technical solution of the fatigue analysis method provided by the embodiment of the present invention, the obtained digital model of the component assembly is input into the finite element processing model to generate a result file; calculations are performed based on the result file to generate finite element output results, and the finite element output results include unit wheel jump stress; the finite element output results are input into the fatigue analysis model to correct the equivalent wheel jump; the corrected equivalent wheel jump and unit wheel jump stress are calculated to generate the damage value corresponding to each position in the component assembly; fatigue analysis is performed based on the damage value corresponding to each position to determine the risk of cracking. In the technical solution provided by the embodiment of the present invention, the fatigue life of the component under the road spectrum load can be accurately evaluated, which improves the accuracy of fatigue life evaluation.

Brief Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A flowchart of a fatigue analysis method provided by one embodiment of the present invention;

[0035] Figure 2 A schematic diagram of a fatigue analysis provided by an embodiment of the present invention;

[0036] Figure 3 A schematic structural diagram of a fatigue analysis device provided by one embodiment of the present invention;

[0037] Figure 4 A schematic diagram of a computer device provided by an embodiment of the present invention. [Specific implementation method]

[0038] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0041] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] An embodiment of the present invention provides a fatigue analysis method. Figure 1 A flowchart of a fatigue analysis method provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the method includes:

[0043] Step 102: input the acquired component assembly digital model into a finite element processing model to generate a result file.

[0044] In the embodiment of the present invention, the digital model of the component assembly includes the digital model of the nonlinear component assembly, wherein the nonlinear component assembly includes a leaf spring assembly, a shock absorber assembly or a stabilizer bar assembly.

[0045] For automotive parts with significant nonlinearity, such as leaf spring assemblies, shock absorber assemblies, stabilizer bar assemblies, etc., the fatigue analysis methods in related technologies cannot effectively reflect their actual damage conditions under road spectrum loads, which may lead to deviations in fatigue life assessment.

[0046] In an embodiment of the present invention, the acquired digital model of the component assembly can be input into a finite element pre-processing model for pre-processing to generate a mesh file; the mesh file can be input into a finite element processing model for finite element simulation to generate a result file, which includes step size, Z-direction displacement, maximum principal stress and hard point support reaction force.

[0047] In an embodiment of the present invention, the constructed digital model of the component assembly can be input into the finite element pre-processing model (Hypermesh) through the modeling software UG for meshing to generate a mesh file; the mesh file can be input into the finite element processing model (Abaqus) for finite element simulation to generate a result file.

[0048] In the embodiment of the present invention, since the third leaf of the main spring is frequently broken due to four-column test, bench test and road test, the following steps can be used to analyze the cause of leaf spring breakage. That is, when the digital model of the component assembly is the digital model of the leaf spring assembly, the digital model of the leaf spring assembly is input into the finite element processing model to generate a result file, and the result file may include step length, Z-direction displacement and maximum principal stress. Among them, the hard point support reaction force is not used in the calculation of the digital model of the leaf spring assembly, but can be used in the calculation of other digital models of the component assembly.

[0049] Step 104: Calculate according to the result file to generate finite element output results, which include unit runout stress.

[0050] In an embodiment of the present invention, the unit runout stress or unit load stress corresponding to each step length, Z-direction displacement, maximum principal stress and hard-point support reaction force is calculated based on the step length, Z-direction displacement, maximum principal stress and hard-point support reaction force.

[0051] In an embodiment of the present invention, when the digital model of the component assembly is the digital model of the leaf spring assembly, the unit wheel run-out stress corresponding to each step length, Z-direction displacement and maximum principal stress can be calculated based on the step length, Z-direction displacement and maximum principal stress. Among them, the unit load stress is not used in the calculation of the digital model of the leaf spring assembly, and can be used in the calculation of other digital models of the component assembly. Specifically, unit wheel run-out stress = (maximum principal stress - stress under no-load state) / wheel run-out, that is, unit wheel run-out stress = (Z-direction displacement stress at a certain moment - no-load Z-direction displacement stress) / (Z-direction displacement - no-load displacement). The stress size corresponding to the component assembly under the working condition where the unit wheel run-out stress is the unit wheel run-out value.

[0052] In the embodiment of the present invention, wheel jump is calculated according to the Z-direction displacement. Specifically, wheel jump=Z-direction coordinate-no-load Z-direction coordinate.

[0053] In the embodiment of the present invention, the basic jump stress set in the result file is selected for jump, and the correction amount and equivalent jump of each basic jump stress are generated. Specifically, the correction amount = (unit jump stress - basic jump stress) / basic jump stress, and the equivalent jump = jump * (1 + correction amount).

[0054] In the embodiment of the present invention, Table 1 is the finite element output result corresponding to the leaf spring assembly.

[0055] Table 1

[0056] Step Length Z-direction displacement Wheel Jump Maximum principal stress Unit runout stress Correction Equivalent round trip 3 -2.56093 70.45383 43.8413 8.37377755 -16.26％ 58.99647 3.01 -1.8583 69.7512 45.1239 8.439741538 -15.60％ 58.86821 3.02 -1.15566 69.04856 46.4696 8.506135392 -14.94％ 58.73364 3.03 -0.453022 68.345922 48.0409 8.570593283 -14.29％ 58.57651 3.04 0.249575 67.643325 49.9089 8.631998797 -13.68％ 58.38971 3.05 0.952152 66.940748 51.8308 8.693885524 -13.06％ 58.19752 3.06 1.65473 66.23817 53.6956 8.757947268 -12.42％ 58.01104 3.07 2.35731 65.53559 55.5918 8.822903708 -11.77％ 57.82142 3.08 3.05989 64.83301 57.5804 8.887842783 -11.12％ 57.62256 3.09 3.76247 64.13043 59.6435 8.953043041 -10.47％ 57.41625

[0057] In an embodiment of the present invention, nonlinear finite element analysis software is used to calculate the stress response of components under each load segment, so that more accurate stress results can be obtained, especially in areas where nonlinear effects are significant. The stress and load functions in each interval are calculated, the slope is the stress-load ratio, and the intercept is the full-load stress.

[0058] In the technical solution provided by the embodiment of the present invention, by splitting the complex road spectrum load into multiple small, approximately linear load segments and performing finite element stress analysis separately, the stress response of components can be captured more accurately, especially in areas where nonlinear effects are significant.

[0059] Step 106: Input the finite element output results into the fatigue analysis model to correct the equivalent wheel jump.

[0060] In the embodiment of the present invention, the equivalent wheel jump can be corrected according to the wheel jump in the finite element output result based on the fatigue analysis model.

[0061] In the embodiment of the present invention, the equivalent round trip can be corrected according to the round trip in the finite element output result based on the following formula.

[0062] When the round jump is less than 20, the equivalent round jump = round jump * 0.95;

[0063] 45>When round jump ≥ 20, equivalent round jump = round jump * 1.1;

[0064] 55>When the round jump is ≥45, the equivalent round jump = round jump*1.04;

[0065] 61>When the round jump is ≥55, the equivalent round jump = round jump*0.94;

[0066] 65>When round jump ≥ 61, equivalent round jump = round jump * 0.9;

[0067] When the round jump is ≥65, the equivalent round jump = round jump*0.84.

[0068] In the embodiment of the present invention, the original load spectrum is corrected based on the finite element output results. The stress response of the components in each load range can be more accurately reflected. The load spectrum is corrected using the stress and load function obtained by processing the finite element output results. Different load ranges correspond to different stress-load ratios. The appropriate load range is intercepted for linear fitting, which can reflect the nonlinearity of the system without making the operation complicated due to too many ranges.

[0069] In the technical solution provided by the embodiment of the present invention, the load spectrum is corrected based on the finite element output result to ensure the accuracy of fatigue simulation, and can effectively reflect the stress response of components under actual road spectrum load, thereby improving the accuracy of fatigue life assessment.

[0070] Step 108: Calculate the corrected equivalent wheel runout and unit wheel runout stress to generate a damage value corresponding to each position in the component assembly.

[0071] In the embodiment of the present invention, the corrected equivalent wheel runout and unit wheel runout stress can be calculated based on the road spectrum load correction model to generate the damage value and maximum principal stress corresponding to each position in the component assembly.

[0072] Step 110: Perform fatigue analysis according to the damage value corresponding to each position to determine the cracking risk.

[0073] In the embodiment of the present invention, when the damage value is greater than a set damage threshold, there is a risk of cracking at the position corresponding to the damage value.

[0074] In the embodiment of the present invention, the damage threshold can be set according to actual conditions, for example, the damage threshold is set to 1.

[0075] Figure 2 A schematic diagram of a fatigue analysis provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the maximum principal stress and damage value corresponding to the two positions are shown. Among them, the maximum principal stress corresponding to one position is 593Mpa, and the damage value is 2.466. 2.466 is greater than the set damage threshold 1, so there is a risk of cracking at this position; the maximum principal stress corresponding to the other position is 708Mpa, and the damage value is 0.559. 0.559 is less than the set damage threshold 1, so there is no risk of cracking at this position. For nonlinear components, road spectrum fatigue analysis damage can effectively identify cracking risks beyond the strength analysis capability. When the damage value is greater than the set damage threshold (greater than 1), it is determined that there is a risk of cracking at this position.

[0076] In the embodiment of the present invention, fatigue simulation is performed using the modified load spectrum to predict the fatigue life of components under the road spectrum load.

[0077] In the technical solution provided by the embodiment of the present invention, the obtained digital model of the component assembly is input into the finite element processing model to generate a result file; calculations are performed based on the result file to generate finite element output results, and the finite element output results include unit wheel jump stress; the finite element output results are input into the fatigue analysis model to correct the equivalent wheel jump; the corrected equivalent wheel jump and unit wheel jump stress are calculated to generate the damage value corresponding to each position in the component assembly; fatigue analysis is performed based on the damage value corresponding to each position to determine the risk of cracking. In the technical solution provided by the embodiment of the present invention, the fatigue life of the component under the road spectrum load can be accurately evaluated, which improves the accuracy of fatigue life evaluation.

[0078] The technical solution provided in the embodiment of the present invention is applicable to components with significant nonlinearity, such as leaf spring assemblies, shock absorber assemblies, stabilizer bar assemblies, etc. Through refined processing and load spectrum correction, the fatigue life of these systems under road spectrum loads can be more accurately evaluated.

[0079] In the technical solution provided by the embodiment of the present invention, the fatigue life of components under road spectrum loads can be more accurately evaluated through refined processing and load spectrum correction, thereby reducing the risks caused by inaccurate evaluation and improving the accuracy of fatigue life evaluation.

[0080] In the technical solution provided by the embodiment of the present invention, accurate fatigue life assessment results can optimize product design and improve product reliability and durability.

[0081] In the technical solution provided by the embodiment of the present invention, the test cost and time cost can be greatly reduced based on simulation analysis. At the same time, due to the improved accuracy of the evaluation results, the additional cost caused by test failure can also be reduced.

[0082] An embodiment of the present invention provides a fatigue analysis device. Figure 3 A structural diagram of a fatigue analysis device provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the device includes: a first generating module 11, a second generating module 12, a correcting module 13, a third generating module 14 and a fatigue analyzing module 15.

[0083] The first generating module 11 is used for inputting the acquired digital model of the component assembly into the finite element processing model to generate a result file.

[0084] The second generating module 12 is used to perform calculations according to the result file to generate finite element output results, and the finite element output results include unit runout stress.

[0085] The correction module 13 is used to input the finite element output result into the fatigue analysis model to correct the equivalent wheel jump;

[0086] The third generating module 14 is used to calculate the corrected equivalent wheel runout and unit wheel runout stress, and generate the damage value corresponding to each position in the component assembly.

[0087] The fatigue analysis module 15 is used to perform fatigue analysis according to the damage value corresponding to each position to determine the cracking risk.

[0088] In an embodiment of the present invention, the first generation module 11 is specifically used to input the acquired digital model of the component assembly into the finite element pre-processing model for pre-processing to generate a mesh file; input the mesh file into the finite element processing model for finite element simulation to generate a result file, and the result file includes step size, Z-direction displacement, maximum principal stress and hard point support reaction force.

[0089] In an embodiment of the present invention, the second generation module 12 is specifically used to calculate the unit wheel jump stress or unit load stress corresponding to each step length, Z-direction displacement, maximum principal stress and hard point support reaction force according to the step length, Z-direction displacement, maximum principal stress and hard point support reaction force; calculate the wheel jump according to the Z-direction displacement; perform wheel jump according to the basic wheel jump stress set in the result file, and generate the correction amount and equivalent wheel jump of each basic wheel jump stress.

[0090] In the embodiment of the present invention, the correction module 13 is specifically used to correct the equivalent wheel jump according to the wheel jump in the finite element output result based on the fatigue analysis model.

[0091] In the embodiment of the present invention, the third generating module 14 is specifically used to calculate the corrected equivalent wheel jump and unit wheel jump stress based on the road spectrum load correction model, and generate the damage value corresponding to each position in the component assembly.

[0092] In the embodiment of the present invention, the fatigue analysis module 15 is specifically used to determine that when the damage value is greater than a set damage threshold, there is a risk of cracking at the position corresponding to the damage value.

[0093] In the embodiment of the present invention, the component assembly digital model includes a nonlinear component assembly digital model.

[0094] In the technical solution provided by the embodiment of the present invention, the obtained digital model of the component assembly is input into the finite element processing model to generate a result file; calculations are performed based on the result file to generate finite element output results, and the finite element output results include unit wheel jump stress; the finite element output results are input into the fatigue analysis model to correct the equivalent wheel jump; the corrected equivalent wheel jump and unit wheel jump stress are calculated to generate the damage value corresponding to each position in the component assembly; fatigue analysis is performed based on the damage value corresponding to each position to determine the risk of cracking. In the technical solution provided by the embodiment of the present invention, the fatigue life of the component under the road spectrum load can be accurately evaluated, which improves the accuracy of fatigue life evaluation.

[0095] The fatigue analysis device provided in the embodiment of the present invention can be used to achieve the above Figure 1 The fatigue analysis method in the embodiment of the fatigue analysis method can be specifically described in detail, and will not be repeated here.

[0096] An embodiment of the present invention provides a storage medium, which includes a stored program. When the program is running, the device where the storage medium is located is controlled to execute the steps of the embodiment of the above fatigue analysis method. For a specific description, please refer to the embodiment of the above fatigue analysis method.

[0097] An embodiment of the present invention provides a computer device, including a memory and a processor, the memory is used to store information including program instructions, the processor is used to control the execution of the program instructions, and when the program instructions are loaded and executed by the processor, the steps of the embodiment of the above-mentioned fatigue analysis method are implemented. For a specific description, please refer to the embodiment of the above-mentioned fatigue analysis method.

[0098] Figure 4 A schematic diagram of a computer device provided by an embodiment of the present invention. Figure 4 As shown, the computer device 20 of this embodiment includes: a processor 21, a memory 22, and a computer program 23 stored in the memory 22 and executable on the processor 21. When the computer program 23 is executed by the processor 21, the fatigue analysis method in the embodiment is implemented. To avoid repetition, it is not described one by one here. Alternatively, when the computer program is executed by the processor 21, the functions of each model / unit in the fatigue analysis device in the embodiment are implemented. To avoid repetition, it is not described one by one here.

[0099] The computer device 20 includes, but is not limited to, a processor 21 and a memory 22. Those skilled in the art will appreciate that Figure 4 It is only an example of the computer device 20 and does not constitute a limitation of the computer device 20. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the computer device may also include input and output devices, network access devices, buses, etc.

[0100] The processor 21 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0101] The memory 22 may be an internal storage unit of the computer device 20, such as a hard disk or memory of the computer device 20. The memory 22 may also be an external storage device of the computer device 20, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the computer device 20. Further, the memory 22 may also include both an internal storage unit of the computer device 20 and an external storage device. The memory 22 is used to store computer programs and other programs and data required by the computer device. The memory 22 may also be used to temporarily store data that has been output or is to be output.

[0102] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0103] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0104] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0105] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0106] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (Processor) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0107] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fatigue analysis method, characterized in that: include: Input the acquired component assembly digital model into the finite element processing model to generate a result file; Perform calculation according to the result file to generate finite element output results, wherein the finite element output results include unit runout stress; Inputting the finite element output result into a fatigue analysis model to correct equivalent wheel jump; Calculating the corrected equivalent wheel runout and the unit wheel runout stress to generate a damage value corresponding to each position in the component assembly; A fatigue analysis is performed based on the damage value corresponding to each position to determine the risk of cracking.

2. The method according to claim 1, characterized in that The step of inputting the acquired component assembly digital model into the finite element processing model to generate a result file includes: Input the acquired component assembly digital model into the finite element pre-processing model for pre-processing to generate a mesh file; The grid file is input into a finite element processing model for finite element simulation to generate a result file, wherein the result file includes step length, Z-direction displacement, maximum principal stress and hard point support reaction force.

3. The method according to claim 2, characterized in that The step of performing calculation according to the result file to generate finite element output results includes: Calculate the unit runout stress or unit load stress corresponding to each of the step length, the Z-direction displacement, the maximum principal stress and the hard point support reaction force according to the step length, the Z-direction displacement, the maximum principal stress and the hard point support reaction force; Calculating wheel runout according to the Z-direction displacement; The basic jump stress set in the result file is selected for jump, and the correction amount and equivalent jump of each basic jump stress are generated.

4. The method according to claim 1, characterized in that The step of inputting the finite element output result into a fatigue analysis model to correct equivalent wheel jump includes: Based on the fatigue analysis model, the equivalent wheel jump is corrected according to the wheel jump in the finite element output result.

5. The method according to claim 1, characterized in that The calculation of the corrected equivalent wheel runout and the unit wheel runout stress to generate a damage value corresponding to each position in the component assembly includes: The corrected equivalent wheel runout and the unit wheel runout stress are calculated based on the road spectrum load correction model to generate a damage value corresponding to each position in the component assembly.

6. The method according to claim 1, characterized in that The performing fatigue analysis according to the damage value corresponding to each position to determine the cracking risk comprises: When the damage value is greater than a set damage threshold, there is a risk of cracking at the position corresponding to the damage value.

7. The method according to claim 1, characterized in that The component assembly digital model includes a nonlinear component assembly digital model.

8. A fatigue analysis device, characterized in that: include: The first generation module is used to input the acquired component assembly digital model into the finite element processing model to generate a result file; A second generating module is used to perform calculation according to the result file to generate a finite element output result, wherein the finite element output result includes a unit runout stress; A correction module, used for inputting the finite element output result into a fatigue analysis model to correct the equivalent wheel jump; A third generation module is used to calculate the corrected equivalent wheel runout and the unit wheel runout stress to generate a damage value corresponding to each position in the component assembly; The fatigue analysis module is used to perform fatigue analysis according to the damage value corresponding to each position to determine the risk of cracking.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the fatigue analysis method according to any one of claims 1 to 7.

10. A computer device comprising a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, characterized in that: When the program instructions are loaded and executed by the processor, the steps of the fatigue analysis method according to any one of claims 1 to 7 are implemented.

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