Strength Analysis Method, Device, Medium and Equipment for Suspension Sheet Metal Bracket

Abstract

A method, device, medium and equipment for strength analysis of a suspension sheet metal bracket. The method includes: establishing a finite element model of the suspension sheet metal bracket; obtaining load data at each moment collected by a three-force acquisition device, where the load data includes loads in three axial directions; for each condition of the vehicle durability test, respectively extracting the maximum loads in the three axial directions, and extracting the loads in other axial directions at the corresponding moments according to the maximum loads in each axial direction; obtaining the equipment correction coefficient of the three-force acquisition device, and correcting the loads in the three axial directions extracted according to the equipment correction coefficient; loading the corrected loads in the three axial directions into the finite element model for strength analysis, and judging whether the suspension sheet metal bracket meets the requirements according to the results of the strength analysis. The present invention reduces weight and cost while ensuring strength and durability, reduces the durability test cycle, shortens the development cycle and achieves the lightweight goal.

Description

Technical Field

[0001] The present invention relates to the field of automobiles, and particularly to a method, device, medium and equipment for analyzing the strength of a suspension sheet metal bracket. Background Art

[0002] The suspension sheet metal bracket of the powertrain is mainly used to support important power components including the engine and the transmission. Its main function is to support the reaction force generated by the motion acceleration of the powertrain under various working conditions. Therefore, in the production of the suspension sheet metal bracket, the analysis of its strength is particularly important. With the continuous improvement of the national automobile industry level, especially the commercial light trucks are developing towards the direction of lightweight, miniaturization, comfort, low cost and low noise. Coupled with the prominent problem of "big tonnage with small label", the requirement for lightweight is further increased, making the strength analysis of the suspension sheet metal bracket more difficult.

[0003] When analyzing the strength of the suspension sheet metal bracket, the general 28 working conditions are often used for theoretical calculation of force analysis. However, in commercial light truck models, there are limitations in the unreasonable and imperfect definition of working conditions, and it is difficult to consider the periodic vibration excitation. As a result, there is a large difference between the analysis result and the actual situation, and it is necessary to verify through multiple rounds of vehicle durability tests, resulting in a long development cycle and high development cost. Usually, under the limitation of the engine compartment space structure, based on the unreasonable analysis method, the sheet metal bracket mostly adopts to increase the sheet thickness and material grade, resulting in the deterioration of the system weight and cost, which is not conducive to achieving the lightweight goal. Summary of the Invention

[0004] In view of the above situation, it is necessary to provide a method, device, medium and equipment for analyzing the strength of a suspension sheet metal bracket to solve the problems of long development cycle and high cost in the strength analysis of the suspension sheet metal bracket in the prior art.

[0005] A method for analyzing the strength of a suspension sheet metal bracket includes:

[0006] Establishing a finite element model of the suspension sheet metal bracket;

[0007] When a three-force acquisition device is installed on the suspension sheet metal bracket and a vehicle durability test is carried out, obtaining the load data collected by the three-force acquisition device at each moment, where the load data includes the loads in three axial directions, and the three axial directions include the x-axis direction, the y-axis direction and the z-axis direction;

[0008] For each working condition of the vehicle durability test, respectively extracting the maximum loads in the three axial directions, and extracting the loads in the other axial directions at the corresponding moments according to the maximum loads in each axial direction;

[0009] Obtaining the device correction coefficient of the three-force acquisition device, and correcting the loads in the three axial directions extracted according to the device correction coefficient;

[0010] Load the corrected loads in the three axial directions into the finite element model for strength analysis, and determine whether the suspension sheet metal bracket meets the requirements according to the results of the strength analysis.

[0011] Further, for the above-mentioned strength analysis method of the suspension sheet metal bracket, the step of loading the corrected loads in the three axial directions into the finite element model for strength analysis includes:

[0012] Use Abaqus software to assign materials and set constraints to the finite element model, and load the corrected loads in the three axial directions into the finite element model for strength analysis.

[0013] Further, for the above-mentioned strength analysis method of the suspension sheet metal bracket, the step of obtaining the equipment correction coefficient of the three-force acquisition device includes:

[0014] Obtain the calibration data when the three-force sensor is actually calibrated on the test bench, and determine the equipment correction coefficient of the three-force acquisition device according to the calibration data.

[0015] Further, for the above-mentioned strength analysis method of the suspension sheet metal bracket, after the step of correcting the loads in the three axial directions according to the equipment correction coefficient, the following steps are also included:

[0016] Obtain a preset empirical correction coefficient;

[0017] Perform secondary correction on the corrected loads in the three axial directions according to the empirical correction coefficient.

[0018] Further, for the above-mentioned strength analysis method of the suspension sheet metal bracket, the formula for correcting the loads in the three axial directions is:

[0019] where K1 is the empirical correction coefficient, K2 is the equipment correction coefficient of the three-force acquisition device, F i is the load in the i-axis direction, and F i ′ is the corrected load.

[0020] Further, for the above-mentioned strength analysis method of the suspension sheet metal bracket, the step of establishing the finite element model of the suspension sheet metal bracket includes:

[0021] Use pre-processing software and the digital model of the suspension sheet metal bracket to establish an initial finite element analysis model of the suspension sheet metal bracket;

[0022] Perform finite element meshing on the finite element initial model, and perform mesh optimization on the connection positions in the finite element initial model to obtain a finite element analysis model.

[0023] The present invention also discloses a strength analysis device for a suspension sheet metal bracket, comprising:

[0024] A model establishment module for establishing a finite element model of the suspension sheet metal bracket;

[0025] A data acquisition module for acquiring load data at each moment collected by a three-force acquisition device when the three-force acquisition device is installed on the suspension sheet metal bracket and a vehicle endurance test is carried out. The load data includes loads in three axial directions, and the three axial directions include the x-axis direction, the y-axis direction, and the z-axis direction;

[0026] A data extraction module for respectively extracting the maximum loads in the three axial directions for each working condition of the vehicle endurance test, and extracting the loads in other axial directions at the corresponding moments according to the maximum loads in each axial direction;

[0027] A first correction module for obtaining an equipment correction coefficient of the three-force acquisition device and correcting the loads in the three extracted axial directions according to the equipment correction coefficient;

[0028] An analysis module for loading the corrected loads in the three axial directions into the finite element model for strength analysis, and judging whether the suspension sheet metal bracket meets the requirements according to the results of the strength analysis.

[0029] Further, in the above strength analysis device for a suspension sheet metal bracket, the correction module is used for:

[0030] Obtaining calibration data when the three-force sensor is actually calibrated on a test bench, and determining the equipment correction coefficient of the three-force acquisition device according to the calibration data.

[0031] Further, the above strength analysis device for a suspension sheet metal bracket further comprises a second correction module for:

[0032] Obtaining a preset empirical correction coefficient;

[0033] Performing secondary correction on the corrected loads in the three axial directions according to the empirical correction coefficient.

[0034] The present invention also discloses an electronic device, comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor runs the computer program, the method described in any one of the above is implemented.

[0035] The present invention also discloses a computer-readable storage medium, on which a program is stored. When the program is executed by a processor, the method described in any one of the above is implemented.

[0036] The present invention uses a three-component force device and a test tooling to actually measure the loads of the mounting bracket under various working conditions, and combines the equipment calibration coefficient to calibrate the collected load data, improve the data accuracy, reduce the weight and cost on the premise of ensuring strength and durability, reduce the durability test cycle, shorten the development cycle and achieve the lightweight goal, and through the accumulation of road spectrum data, establish a database and provide data support for subsequent other projects. Brief Description of the Drawings

[0037] Figure 1 It is a flowchart of the strength analysis method for the mounting sheet metal bracket in the first embodiment of the present invention;

[0038] Figure 2 It is a flowchart of the strength analysis method for the mounting sheet metal bracket in the second embodiment of the present invention;

[0039] Figure 3 It is a structural block diagram of the strength analysis device for the mounting sheet metal bracket in the third embodiment of the present invention;

[0040] Figure 4 It is a schematic structural diagram of the electronic device in the embodiment of the present invention. Detailed Description of the Embodiments

[0041] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0042] Referring to the following description and drawings, these and other aspects of the embodiments of the present invention will be clear. In these descriptions and drawings, some specific embodiments in the embodiments of the present invention are specifically disclosed to represent some ways of implementing the principles of the embodiments of the present invention, but it should be understood that the scope of the embodiments of the present invention is not limited thereto. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents falling within the spirit and connotation of the appended claims.

[0043] Please refer to Figure 1 , which is the strength analysis method for the mounting sheet metal bracket in the first embodiment of the present invention, including steps S11 to S15.

[0044] Step S11, establish a finite element model of the mounting sheet metal bracket.

[0045] Specifically, when implementing, use pre-processing software to establish an initial finite element analysis model according to the digital model of the mounting sheet metal bracket, then perform finite element meshing, and perform mesh optimization and special processing on the connection positions, and finally obtain a finite element analysis model.

[0046] Step S12: When the three-force acquisition device is installed on the suspension sheet metal bracket and the vehicle endurance test is carried out, obtain the load data at each moment collected by the three-force acquisition device. The load data includes the loads in three axial directions, and the three axial directions include the x-axis direction, the y-axis direction, and the z-axis direction.

[0047] The vehicle endurance test usually includes experiments under multiple working conditions, such as long-wave roads, short slopes, washboard roads, sine-twist roads, pothole roads, bump roads, and Belgian roads. When conducting the vehicle endurance test, install the three-force acquisition device on the suspension sheet metal bracket to collect in real time the loads on the suspension sheet metal bracket in three axial directions, namely the load in the x-axis direction, the load in the y-axis direction, and the load in the z-axis direction. The load data collected by the three-force acquisition device is time-domain data, that is, the three-direction load data at each moment. Specifically, the three-force acquisition device can be a three-force sensor.

[0048] Step S13: For each working condition of the vehicle endurance test, extract the maximum loads in the three axial directions respectively, and extract the loads in the other axial directions at the corresponding moments according to the maximum loads in each axial direction.

[0049] Each working condition corresponds to a set of load data. Respectively extract the maximum load on the X-axis, the maximum load on the Y-axis, and the maximum load on the Z-axis in each set of load data; find the loads on the Y-axis and Z-axis at the same moment according to the maximum load on the X-axis; find the loads on the X-axis and Z-axis at the same moment according to the maximum load on the Y-axis; find the loads on the X-axis and Y-axis at the same moment according to the maximum load on the Z-axis.

[0050] For example, a set of load data corresponding to working condition 1 is shown in Table 1. The maximum load in the X-axis direction under this working condition is 1057, which is the load at time t3. Query to obtain that the load in the Y-axis direction at this moment is 1472, and the load in the Z-axis direction is 1087; the maximum load in the Y-axis direction under this working condition is 4839, which is the load at time t4. Query to obtain that the load in the X-axis direction at this moment is 577, and the load in the Z-axis direction is 1498; the maximum load in the Z-axis direction under this working condition is 1498, which is the load at time t4. Query to obtain that the load in the X-axis direction at this moment is 577, and the load in the Y-axis direction is 4839. That is, the moments corresponding to the maximum loads on the Y-axis and the Z-axis are the same moment. In this case, only one set of data can be taken.

[0051] Table 1

[0052]

[0053]

[0054] Step S14: Obtain the device calibration coefficient of the three-force acquisition device, and calibrate the loads in the three axis directions extracted according to the device calibration coefficient.

[0055] Considering the device accuracy of the three-force acquisition device itself, calibrate the raw data collected by the three-force acquisition device. During specific implementation, install the tooling fixture with the three-force sensor on the test bench, apply a linear loading force using the loading device on the test bench, and obtain a linear relationship curve based on the loading force of the test bench device and the readings of the three-force device. Through actual measurement and comparison of the three-force sensor on the test bench alone, obtain the device calibration coefficient of the three-force device, and calibrate the loads in the three axis directions extracted according to the device calibration coefficient.

[0056] Step S15: Load the calibrated loads in the three axis directions into the finite element model for strength analysis, and determine whether the suspension sheet metal bracket meets the requirements according to the results of the strength analysis.

[0057] The load calibrated by the device calibration coefficient is the actual force on each direction of the suspension sheet metal bracket. Use the calibrated load and the corresponding working conditions as the input for the strength analysis of the aforementioned finite element analysis model. Finally, use the Abaqus solver software to load the analysis model according to the actual force on each direction of the suspension bracket obtained, and modify the material parameters of the analysis model according to the true "stress-strain" curve to obtain the strength analysis results of the suspension sheet metal bracket.

[0058] The strength analysis of the suspension sheet metal bracket can be carried out using CAE software. During specific implementation, generally use hypermesh software for pre-processing, divide the mesh model according to the 3D digital model of the suspension sheet metal bracket, and then use Abaqus software to assign materials, define properties, contact constraints, interactions, load settings to the mesh model, and finally submit the operation to obtain the analysis results. The result of this strength analysis is the stress generated by the suspension sheet metal bracket under the applied load, and determine whether the stress of the suspension sheet metal bracket meets the requirements.

[0059] In this embodiment, the three-force device and the test tooling are used to actually measure the loads of each working condition of the suspension bracket, combined with the device calibration coefficient, to calibrate the collected load data, improve data accuracy, reduce weight and cost under the premise of ensuring strength and durability, reduce the durability test cycle, shorten the development cycle and achieve the lightweight goal, and through the accumulation of road spectrum data, establish a database and provide data support for subsequent other projects.

[0060] In this embodiment, through the actual vehicle road test conditions, the true stress level of the mounting sheet metal bracket in the actual vehicle road durability test is analyzed, solving the limitation of using a single general 28-condition theoretical calculation for the strength of the mounting bracket in the past. The analysis results have high accuracy. The true force on the mounting sheet metal bracket in the actual vehicle road test plays an important role in strength analysis prediction during the product development stage and targeted improvement and optimization of later faults. Since the finite element analysis model is corrected to ensure the accuracy of the model material properties, and the working condition forces are calculated based on the working condition forces obtained from the durability road test conditions, the analysis results are highly credible, reducing weight and cost while ensuring strength and durability; reducing the durability test cycle, shortening the development cycle, and achieving the lightweight goal.

[0061] Please refer to Figure 2 , which is the method for analyzing the strength of the mounting sheet metal bracket in the second embodiment of the present invention, including steps S21 to S28.

[0062] Step S21, use pre-processing software to establish an initial finite element analysis model according to the digital model of the mounting sheet metal bracket.

[0063] Step S22, perform finite element meshing on the initial finite element model, and perform mesh optimization on the connection positions in the initial finite element model to obtain a finite element analysis model.

[0064] Step S23, when the three-force acquisition device is installed on the mounting sheet metal bracket and the vehicle durability test is carried out, obtain the load data at each moment collected by the three-force acquisition device. The load data includes the loads in three axial directions, and the three axial directions include the x-axis direction, the y-axis direction, and the z-axis direction.

[0065] Step S24, for each condition of the vehicle durability test, extract the maximum loads in the three axial directions respectively, and extract the loads in the other axial directions at the corresponding moments according to the maximum loads in each axial direction.

[0066] Step S25, conduct on-site measurement and calibration of the three-force sensor on the test bench, and determine the device calibration coefficient of the three-force acquisition device according to the calibration result.

[0067] Step S26, obtain the preset empirical calibration coefficient, and correct the loads in the three axial directions extracted according to the empirical calibration coefficient and the device calibration coefficient.

[0068] Step S27, load the corrected loads in the three axial directions into the finite element model for strength analysis.

[0069] Step S28, judge whether the mounting sheet metal bracket meets the requirements according to the result of the strength analysis.

[0070] In this embodiment, first, a finite element analysis initial model is established by using pre-processing software according to the digital model of the suspension sheet metal bracket. Then, finite element meshing is performed, and grid optimization and special treatment are carried out on the connection positions. Finally, a finite element analysis model is obtained.

[0071] Subsequently, the three-component force device is installed on the suspension sheet metal bracket through a tooling and assembled onto the whole vehicle, and the loads in three directions under various working conditions of the suspension bracket are collected during the whole vehicle durability test.

[0072] Then, iterative processing is performed based on the collected road spectrum data to extract the maximum force in each axis direction of the suspension bracket under each working condition. Moreover, the three-component force sensor is separately measured and calibrated on the test bench to obtain the device calibration coefficient of the three-component force device, and a calibration coefficient is established in combination with a preset empirical calibration coefficient. This empirical calibration coefficient is engineering experience or a safety factor. The loads in each extracted direction are corrected according to the established calibration coefficient. The correction formula is:

[0073] where K1 is the empirical calibration coefficient, K2 is the device calibration coefficient of the three-component force acquisition device, F i is the load in the i-axis direction, and F i ′ is the corrected load.

[0074] The true forces in each direction of the suspension sheet metal bracket and the corresponding working conditions are obtained and used as the input for the strength analysis of the aforementioned finite element analysis model. Finally, the Abaqus solver software is used to load the analysis model according to the true forces in each direction of the suspension bracket obtained, and the material parameters of the analysis model are corrected based on the true "stress-strain" curve to obtain the strength analysis result of the suspension sheet metal bracket.

[0075] In the strength analysis method of the suspension sheet metal bracket in this embodiment, the three-component force device and the test tooling are used to actually measure the loads of the suspension bracket under various working conditions, a correction coefficient is established in combination with the device calibration coefficient and engineering application experience, and the collected load data is corrected by using the established correction coefficient to improve the data accuracy. The analysis result obtained by actually measuring the three-component force based on the road durability test conditions is closer to the actual situation, can reduce the durability test cycle, shorten the development cycle, and achieve the goal of vehicle lightweighting, etc.

[0076] It should be noted that for the strength analysis of the suspension sheet metal bracket, there are currently mainly two types of working condition analyses. One is the extreme working condition, that is, the maximum force working conditions in the X / Y / Z directions (including positive and negative directions, a total of 6, and specific working conditions can be appropriately covered and reduced according to the force values). The other is the typical working condition, that is, the point working condition force with the largest damage after the rain flow counting statistics conversion. It is possible that the force value at this point is not the largest, but the number of cycles is large, resulting in relatively large damage, which also needs to be analyzed. The strength evaluation criteria for the suspension sheet metal bracket vary among different vehicle manufacturers. Some only perform the strength analysis under the extreme working condition, while some vehicle manufacturers need to analyze the strength under both the extreme working condition and the typical working condition. In this embodiment, the finite element model is analyzed under the extreme working condition.

[0077] It can be understood that in other embodiments of the present invention, the analysis of both the extreme working condition and the typical working condition can also be performed. Specifically, during implementation, according to the measured values of the working condition loads, the maximum extreme point is taken as the loading force for the extreme working condition. The measured data values of the working condition loads are subjected to rain flow counting statistics to obtain an amplitude-mean-cycle number matrix, and then substituted into the S-N fatigue curve to obtain a damage matrix. The point with the largest damage is found, and the maximum force at this point is taken as the loading force for the typical working condition analysis.

[0078] The strength evaluation criteria for the suspension sheet metal bracket are, for example:

[0079] 1. For brittle materials, such as AlSi9Cu3, under the extreme working condition, the strength of the bracket should meet the requirement that the maximum stress is lower than the yield strength of the material; under the typical working condition, the strength of the bracket should meet the requirement that the Mises stress is lower than 75% of the yield strength of the material.

[0080] 2. For plastic materials, such as QstE380TM, QstE420TM, DC01, etc., under the extreme working condition, the strength of the bracket should meet the requirement that the Mises stress is lower than the tensile strength of the material; under the typical working condition, the strength of the bracket should meet the requirement that the Mises stress is lower than the yield strength of the material.

[0081] Please refer to Figure 3 , which is the strength analysis device for the suspension sheet metal bracket in the third embodiment of the present invention, including:

[0082] A model establishment module 31, configured to establish a finite element model of the suspension sheet metal bracket;

[0083] A data acquisition module 32, configured to obtain the load data at each moment collected by the three-force acquisition device when the three-force acquisition device is installed on the suspension sheet metal bracket and a vehicle durability test is performed. The load data includes the loads in three axial directions, and the three axial directions include the x-axis direction, the y-axis direction, and the z-axis direction;

[0084] A data extraction module 33 is configured to extract the maximum loads in three axial directions respectively for each working condition of the vehicle durability test, and extract the loads in other axial directions at the corresponding moments according to the maximum loads in each axial direction.

[0085] A first correction module 34 is configured to obtain the device correction coefficient of the three-force acquisition device, and correct the loads in the three axial directions extracted according to the device correction coefficient.

[0086] An analysis module 35 is configured to load the corrected loads in the three axial directions into the finite element model for strength analysis, and determine whether the suspension sheet metal bracket meets the requirements according to the results of the strength analysis.

[0087] Further, in the above-mentioned suspension sheet metal bracket strength analysis device, the correction module is configured to:

[0088] Obtain the calibration data when the three-force sensor is actually calibrated on the test bench, and determine the device correction coefficient of the three-force acquisition device according to the calibration data.

[0089] Further, the above-mentioned suspension sheet metal bracket strength analysis device further includes a second correction module, which is configured to:

[0090] Obtain a preset empirical correction coefficient;

[0091] Perform secondary correction on the corrected loads in the three axial directions according to the empirical correction coefficient.

[0092] The implementation principle and the technical effects generated by the suspension sheet metal bracket strength analysis device provided by the embodiments of the present invention are the same as those of the foregoing method embodiments. For a brief description, for the parts not mentioned in the device embodiments, reference may be made to the corresponding contents in the foregoing method embodiments.

[0093] On the other hand, the present invention also proposes an electronic device. Please refer to Figure 4 As shown in the electronic device in the fourth embodiment of the present invention, it includes a processor 10, a memory 20, and a computer program 30 stored in the memory and executable on the processor. When the processor 10 executes the computer program 30, it implements the above-mentioned suspension sheet metal bracket strength analysis method.

[0094] Among them, the electronic device may be, but is not limited to, a controller, a computer, a server, etc. The processor 10 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chips in some embodiments, and is used to run the program code stored in the memory 20 or process data.

[0095] Among them, the memory 20 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (such as SD or DX memory, etc.), magnetic memory, magnetic disk, optical disc, etc. The memory 20 can be an internal storage unit of the electronic device in some embodiments, such as the hard disk of the electronic device. The memory 20 can also be an external storage device of the electronic device in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the electronic device. Further, the memory 20 can also include both an internal storage unit and an external storage device of the electronic device. The memory 20 can be used not only to store application software and various types of data installed in the electronic device, but also to temporarily store data that has been output or will be output.

[0096] Optionally, the electronic device can further include a user interface, a network interface, a communication bus, etc. The user interface can include a display, an input unit such as a keyboard. Optionally, the user interface can also include a standard wired interface and a wireless interface. Optionally, in some embodiments, the display can be an LED display, a liquid crystal display, a touch liquid crystal display, and an OLED (Organic Light-Emitting Diode) toucher, etc. Among them, the display can also be appropriately referred to as a display screen or a display unit, which is used to display the information processed in the electronic device and to display a visual user interface. The network interface can optionally include a standard wired interface and a wireless interface (such as a WI-FI interface), which is usually used to establish a communication connection between this device and other electronic devices. The communication bus is used to realize the connection and communication between these components.

[0097] It should be noted that Figure 4 The structure shown does not constitute a limitation on the electronic device. In other embodiments, the electronic device can include fewer or more components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0098] The present invention also proposes a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the suspension sheet metal bracket strength analysis method as described above.

[0099] Those skilled in the art will understand that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus (such as a computer-based system, a system including a processor, or other systems that can obtain and execute instructions from the instruction execution system, apparatus), or in conjunction with these instruction execution systems, apparatuses. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus.

[0100] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or otherwise processing as appropriate, and then storing it in a computer memory.

[0101] It should be understood that various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0102] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0103] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A method for analyzing the strength of a suspension sheet metal bracket, characterized in that, Including: Establish a finite element model of the suspension sheet metal bracket; When the three-force acquisition device is installed on the suspension sheet metal bracket and the vehicle endurance test is carried out, obtain the load data at each moment collected by the three-force acquisition device. The load data includes the loads in three axial directions, and the three axial directions include the x-axis direction, the y-axis direction, and the z-axis direction; For each condition of the vehicle endurance test, respectively extract the maximum loads in the three axial directions, and extract the loads in other axial directions at the corresponding moments according to the maximum loads in each axial direction; Obtain the device correction coefficient of the three-force acquisition device, and correct the loads in the three axial directions extracted according to the device correction coefficient; Load the corrected loads in the three axial directions into the finite element model for strength analysis, and judge whether the suspension sheet metal bracket meets the requirements according to the results of the strength analysis; After the step of correcting the loads in the three axial directions according to the device correction coefficient, it further includes: Obtain a preset empirical correction coefficient; Perform secondary correction on the corrected loads in the three axial directions according to the empirical correction coefficient; The formula for correcting the loads in the three axial directions is: where K1 is an empirical correction coefficient, K2 is a device correction coefficient of the three-component force acquisition device, F i is the load in the i-axis direction, is the corrected load.

2. The strength analysis method of the suspension sheet metal bracket according to claim 1, characterized in that The step of loading the corrected loads in the three axial directions into the finite element model for strength analysis includes: Use Abaqus software to assign materials and set constraints to the finite element model, and load the corrected loads in the three axial directions into the finite element model for strength analysis.

3. The strength analysis method of the suspension sheet metal bracket according to claim 1, characterized in that, The step of obtaining the device correction coefficient of the three-force acquisition device includes: Obtain the calibration data when the three-force acquisition device is calibrated on the test bench, and determine the device correction coefficient of the three-force acquisition device according to the calibration data.

4. The strength analysis method of the suspension sheet metal bracket according to claim 1, characterized in that The step of establishing the finite element model of the suspension sheet metal bracket includes: Use pre-processing software and the digital model of the suspension sheet metal bracket to establish an initial finite element model of the suspension sheet metal bracket; Perform finite element meshing on the initial finite element model, and perform mesh optimization on the connection positions in the initial finite element model to obtain a finite element model.

5. An intensity analysis device for a suspension sheet metal bracket, characterized in that, Including: A model establishment module for establishing a finite element model of the suspension sheet metal bracket; A data acquisition module for obtaining the load data at each moment collected by the three-force acquisition device when the three-force acquisition device is installed on the suspension sheet metal bracket and the vehicle endurance test is carried out. The load data includes the loads in three axial directions, and the three axial directions include the x-axis direction, the y-axis direction, and the z-axis direction; A data extraction module for respectively extracting the maximum loads in the three axial directions for each condition of the vehicle endurance test, and extracting the loads in other axial directions at the corresponding moments according to the maximum loads in each axial direction; A first correction module for obtaining the device correction coefficient of the three-force acquisition device and correcting the loads in the three axial directions extracted according to the device correction coefficient; An analysis module for loading the corrected loads in the three axial directions into the finite element model for strength analysis, and judging whether the suspension sheet metal bracket meets the requirements according to the results of the strength analysis; It further includes a second correction module for: obtaining a preset empirical correction coefficient; performing secondary correction on the corrected loads in the three axial directions according to the empirical correction coefficient; The formula for correcting the loads in the three axial directions is: Among them, K1 is an empirical correction coefficient, K2 is a device correction coefficient of the three-component force acquisition device, and F i is the load in the i-axis direction, is the corrected load.

6. The strength analysis device for the suspension sheet metal bracket according to claim 5, wherein, The first correction module is used for: obtaining the calibration data when the three-component force acquisition device performs actual measurement and calibration on the test bench, and determining the device correction coefficient of the three-component force acquisition device according to the calibration data.

7. An electronic device, characterized in that, It includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor runs the computer program, it implements the method according to any one of claims 1-4.

8. A computer-readable storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, it implements the method according to any one of claims 1-4.

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