A test method for the strength of a front shock absorber bearing
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-25
- Publication Date
- 2026-08-14
AI Technical Summary
[0002]前减震器支座是汽车结构组成中的重要部分，前减震器支座在汽车结构中有着多种重要的功能，包括安装和固定避震器、支撑车身重量、维护悬挂系统性能、传递和分散应力并作为车身强化件的支点提供连接基础；在车辆行驶过程中，在前减震器支座受到减震力反复作用的过程中，若前减震器支座的强度不足，出现隐裂、开裂等现象，会严重影响车辆性能，使得车辆行驶过程中存在安全隐患
[0024]本申请提供的前减震器支座强度的测试方法，首先对前减震器支座进行预处理，之后对前减震器支座进行应力分析，并根据应力分析结果确定至少一个应力测试点，在应力测试点的位置粘贴应力贴片，之后将安装有前减震器支座的车架部分约束于台架上，通过加载设备沿前减震器支座上安装的减震器的轴向，向前减震器支座施加载荷，直至前减震器支座出现失效现象，记录失效时应力贴片的载荷值，并将实测得到的失效时的应力贴片的载荷值与应力分析得到的同一处的应力测试点的理论临界值进行比对，从而实现在非整车状态下，对前减震器支座强度进行测试，使得测试能够在开发阶段介入，便于进行针对性局部调整，降低测试成本以及整改难度，同时通过加载设备沿减震器轴向施加载荷，精准模拟车辆实际行驶过程中前减震器支座的受力情况，使得失效载荷值能够更精确地反应前减震器支座的受力工况，提高了测试精确性，并进一步通过实测值与理论临界值之间的比对，为应力仿真提供校准依据，使得应力仿真能够为前减震器支座提供理论依据，进一步降低成本。
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Figure CN122567263A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of strength testing technology, and more specifically, to a method for testing the strength of a front shock absorber support. Background Technology
[0002] The front shock absorber mount is an important part of the automotive structure. It has many important functions, including installing and fixing the shock absorber, supporting the weight of the vehicle body, maintaining the performance of the suspension system, transmitting and dispersing stress, and providing a connection base as a fulcrum for body reinforcement components. During vehicle operation, if the front shock absorber mount is not strong enough and develops hidden cracks or other cracks, it will seriously affect the vehicle's performance and create safety hazards during driving.
[0003] Therefore, it is crucial to test the strength of the front shock absorber support to verify whether its strength meets the requirements. Currently, the strength test of the front shock absorber support is usually carried out after the vehicle is assembled and rolled off the production line. This results in high testing costs, many interference factors, and makes it difficult to accurately obtain the strength data of the front shock absorber. Furthermore, if the test results require rectification, the rectification is difficult and costly.
[0004] In conclusion, how to reduce the testing cost of front shock absorber bearings and improve the testing accuracy is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0005] In view of this, the purpose of this application is to provide a test method for the strength of front shock absorber bearings, thereby reducing the testing cost of front shock absorber bearings and improving the testing accuracy.
[0006] To achieve the above objectives, this application provides the following technical solution:
[0007] A method for testing the strength of a front shock absorber bearing, comprising:
[0008] Pre-treat the front shock absorber support;
[0009] Stress analysis was performed on the front shock absorber support, and at least one stress test point was determined based on the stress analysis results.
[0010] Stress patches are attached to the locations of the stress test points;
[0011] The frame portion with the aforementioned front shock absorber mount is constrained to the platform;
[0012] A load is applied to the front shock absorber support along the axial direction of the shock absorber mounted on the front shock absorber support using a loading device until the front shock absorber support fails, and the load value of the stress patch at the time of failure is recorded.
[0013] The load value of the stress patch at the time of failure obtained by actual measurement is compared with the theoretical critical value of the same stress test point obtained by stress analysis.
[0014] In some embodiments, pre-processing the front shock absorber support includes: performing dimensional inspection on the front shock absorber support to confirm that its dimensions are within tolerance.
[0015] In some embodiments, the stress test points include a first stress test point, a second stress test point, a third stress test point, and a fourth stress test point; wherein the first stress test point and the second stress test point are both located on the mounting end face of the front shock absorber support; the third stress test point is located on the inner side of the front shock absorber support; and the fourth stress test point is located on the connecting inclined surface of the front shock absorber support.
[0016] In some embodiments, the frame constraint positions include a first support position located at the front end of the frame and a second support position located at the rear end of the frame; the front shock absorber support is located between the first support position and the second support position.
[0017] In some embodiments, the load applied by the loading device to the front shock absorber support is a stepped-increasing cyclic load; the initial value of the load is 4 kN, and the step increment is 10 kN.
[0018] In some embodiments, during the loading process, the measured values of the stress patch at the stress test point are collected in real time, and the loading continues until the front shock absorber support fails.
[0019] In some embodiments, the cyclic load is applied at a frequency of 5 Hz.
[0020] In some embodiments, the stress test point is the corresponding area where the stress patch is pasted, and its size is an 8mm*8mm square.
[0021] In some embodiments, the load value of the stress patch at failure obtained by actual measurement is compared with the theoretical critical value of the same stress test point obtained by stress analysis, specifically including:
[0022] Stress analysis is performed using a CAE model; when the deviation between the two is within a preset threshold, the CAE model used for stress analysis is determined to be accurate; the structure of the front shock absorber support is optimized using the CAE model that is determined to be accurate.
[0023] In some embodiments, a control system is further included, which is communicatively connected to the loading device and the stress patch; the control system is used to control the loading device to apply the load and synchronously receive and record the stress data collected by the stress patch.
[0024] The method for testing the strength of the front shock absorber support provided in this application first pre-treats the front shock absorber support, then performs stress analysis on the front shock absorber support, and determines at least one stress test point based on the stress analysis results. A stress patch is then attached to the location of the stress test point. Next, the vehicle frame portion with the front shock absorber support is constrained to a test bench. A load is applied to the front shock absorber support along the axial direction of the shock absorber mounted on the support using a loading device until the front shock absorber support fails. The load value of the stress patch at the time of failure is recorded, and the measured load value of the stress patch at the time of failure is compared with the theoretical load value of the stress test point at the same location obtained from the stress analysis. By comparing critical values, the strength of the front shock absorber support can be tested in a non-vehicle state. This allows testing to be initiated during the development phase, facilitating targeted local adjustments, reducing testing costs and the difficulty of rectification. Simultaneously, by applying loads along the shock absorber axis using loading equipment, the stress on the front shock absorber support during actual vehicle operation is accurately simulated. This ensures that the failure load value more accurately reflects the stress condition of the front shock absorber support, improving testing accuracy. Furthermore, by comparing the measured values with theoretical critical values, calibration data is provided for stress simulation, enabling stress simulation to provide a theoretical basis for the front shock absorber support and further reducing costs. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0026] Figure 1 A flowchart illustrating the testing method for the strength of the front shock absorber support provided in this application embodiment;
[0027] Figure 2 A schematic diagram of the model structure for stress analysis provided in this application embodiment;
[0028] Figure 3 A schematic diagram illustrating the dimensional inspection of a shock absorber support provided in an embodiment of this application;
[0029] Figure 4 A schematic diagram of the first and second stress test points provided for embodiments of this application;
[0030] Figure 5 A schematic diagram of the third stress test point provided in the embodiments of this application;
[0031] Figure 6 A schematic diagram of the fourth stress test point provided in the embodiments of this application;
[0032] Figure 7 A schematic diagram of the frame constraint position provided in an embodiment of this application;
[0033] Figure 8 This is a schematic diagram of the load application direction of the loading device provided in the embodiments of this application;
[0034] Figure 9 Stress diagrams of stress test points provided in embodiments of this application.
[0035] Explanation of reference numerals in the attached figures:
[0036] 100 - Front shock absorber support; 110 - First stress test point; 120 - Second stress test point; 130 - Third stress test point; 140 - Fourth stress test point
[0037] 200 - Frame, 210 - First support position, 220 - Second support position. Detailed Implementation
[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.
[0040] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.
[0041] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.
[0042] like Figure 1 As shown in the embodiment of this application, the method for testing the strength of the front shock absorber support includes:
[0043] S100, Pre-treatment of the front shock absorber support 100.
[0044] like Figure 3 As shown, this specifically includes performing dimensional inspection on the front shock absorber support 100 to confirm that its dimensions are within the tolerance range, in order to eliminate the influence of manufacturing deviations on the test results, thereby improving the accuracy of the test and ensuring the correspondence between the measured structural dimensions and the dimensions of the subsequent CAE model, so as to improve the consistency of the test results.
[0045] S200. Perform stress analysis on the front shock absorber support 100 and determine at least one stress test point based on the stress analysis results.
[0046] This application uses CAE software for stress analysis, such as Figure 2 As shown, the CAE model is built first.
[0047] It should be noted that CAE software is a tool that uses the finite element method to numerically simulate and calculate the mechanical properties of engineering structures. It can solve and visualize the physical responses of structures under load, such as stress, strain, and displacement.
[0048] Stress analysis using CAE software first requires building a finite element analysis model of the front shock absorber support. The specific process includes: first, acquiring the three-dimensional geometric model of the front shock absorber support and importing it into the CAE software; then, meshing the geometric model, discretizing it into a finite number of interconnected elements to establish a finite element mesh model; next, assigning material property parameters to the model, including elastic modulus, Poisson's ratio, density, and yield strength, to define the mechanical behavior of the support under actual working conditions; then, applying boundary conditions to the model, constraining the degrees of freedom of corresponding nodes according to the actual installation state of the support in the vehicle, to simulate its fixed constraint relationship on the frame; finally, applying loads along the working axis of the shock absorber to simulate the axial force from the shock absorber that the support experiences during actual use.
[0049] After performing stress analysis on the front shock absorber support 100 using the CAE software, a stress distribution cloud map under simulated real vehicle load was obtained. Based on this stress distribution cloud map, several key areas with significantly higher stress levels than the surrounding areas, or areas of stress concentration, were identified, such as... Figures 4-6 As shown, the selected stress test points include the first stress test point 110, the second stress test point 120, the third stress test point 130, and the fourth stress test point 140.
[0050] Among them, such as Figure 4 As shown, the first stress test point 110 and the second stress test point 120 are both located on the mounting end face of the front shock absorber support 100. The mounting end face is the bearing joint surface between the front shock absorber support 100 and the shock absorber. Under axial load, the mounting end face will bear large compressive stress and bending stress, which is a high stress area on the load transmission path.
[0051] like Figure 5 As shown, the third stress test point 130 is located on the inner side of the front shock absorber support 100. The inner side of the front shock absorber support 100 is prone to stress concentration due to geometric changes during the process of bearing axial load, and is also used as a test point for the stress zone.
[0052] like Figure 6 As shown, the fourth stress test point 140 is located on the connecting slope of the front shock absorber support 100. The connecting slope is the transition area between the mounting end face and the support beam. The geometric curvature changes greatly. As a typical stress concentration area, it is prone to fatigue cracks under repeated loads.
[0053] It should be noted that the measuring point size of the first stress test point 110, the second stress test point 120, the third stress test point 130 and the fourth stress test point 140 are all 8mm*8mm squares. This provides a standardized area size for subsequent stress patch application, so that the patches can be applied with the same area specification in multiple tests. This avoids human error caused by inconsistent application ranges and further ensures the repeatability of the test.
[0054] S300. Apply stress patches to the stress test points.
[0055] Stress patches were attached to the first stress test point 110, the second stress test point 120, the third stress test point 130 and the fourth stress test point 140 respectively, so as to obtain stress data later.
[0056] S400, the frame 200 portion with the front shock absorber support 100 is constrained to the bench.
[0057] like Figure 7 As shown, the constraint positions of the frame 200 include a first support position 210 located at the front end of the frame 200 and a second support position 220 located at the rear end of the frame 200. The front shock absorber support 100 is located between the first support position 210 and the second support position 220 to simulate the actual installation state and constraint boundary of the front shock absorber support 100 and to ensure that the load transfer path is consistent with the actual vehicle, so as to improve the accuracy of the test.
[0058] S500: Apply a load to the front shock absorber support 100 along the axial direction of the shock absorber installed on the front shock absorber support 100 using a loading device until the front shock absorber support 100 fails, and record the load value of the stress patch at the time of failure.
[0059] like Figure 8 As shown, the load applied by the loading device to the front shock absorber support 100 is a stepped cyclic load with an initial value of 4KN and a step increase of 10KN. The loading frequency of the cyclic load is 5HZ, and it is positive in the upward direction along the axis of the shock absorber.
[0060] During the loading process, the measured values of the stress patch at the stress test point are collected in real time, and the load is continuously applied until the front shock absorber support 100 fails. The failure condition and the number of loading times are recorded to obtain the measured load value at the time of failure.
[0061] S600. Compare the load value of the stress patch at failure obtained by actual measurement with the theoretical critical value of the same stress test point obtained by stress analysis.
[0062] The load values of the stress patches at the first stress test point 110, the second stress test point 120, the third stress test point 130, and the fourth stress test point 140 obtained by actual measurement were compared with the stress analysis results obtained in CAE software. Figure 9 The stress values of the first stress test point 110, the second stress test point 120, the third stress test point 130 and the fourth stress test point 140 are compared as shown in Table 1.
[0063] Table SEQ Table* Comparison of Measured and Analyzed Values of Stress Test Points in ARABIC 1 Test point number Test stress / MPa CAE stress / MPa deviation% First stress test point 110 140.45 132.94 -5.65 Second stress test point 120 235.73 234.99 -0.31 Third stress test point 130 174.07 169.36 -2.78 Fourth stress test point 140 188.56 180.18 -4.65
[0064] As shown in Table 1, the deviation between the measured stress value at the first stress test point 110 and the CAE stress analysis value is -5.65%, the deviation between the measured stress value at the second stress test point 120 and the CAE stress analysis value is -0.31%, the deviation between the measured stress value at the third stress test point 130 and the CAE stress analysis value is -2.78%, and the deviation between the measured stress value at the fourth stress test point 140 and the CAE stress analysis value is -4.65%. The absolute values of the deviations are all within 6%, indicating that the stress analysis of the CAE model can accurately predict the stress level of the front shock absorber support 100 under actual load conditions, and the high degree of agreement between the two values demonstrates that the test method provided in this application embodiment can effectively indicate the actual stress state, and that the test process can truly, reliably, and accurately reflect the stress state to ensure the accuracy of the test results.
[0065] Furthermore, if the deviation between the two is within a preset threshold, the CAE model used in the stress analysis is deemed accurate. Using the CAE model that is deemed accurate, the structure of the front shock absorber support 100 is optimized. By optimizing the structure of the front shock absorber support 100 through the calibrated CAE model, the optimization effect can be predicted in advance, further reducing costs.
[0066] It should be noted that this application also includes a control system, which is communicatively connected to the loading device and the stress patch, so as to control the loading device to apply load through the control system, and synchronously receive and record the stress data collected by the stress patch.
[0067] The method for testing the strength of the front shock absorber support provided in this application embodiment can test the strength of the front shock absorber support in a non-vehicle state, allowing the test to be intervened in the development stage, facilitating targeted local adjustments, reducing testing costs and rectification difficulty. At the same time, by applying a load along the axial direction of the shock absorber using a loading device, the stress condition of the front shock absorber support 100 during actual vehicle driving is accurately simulated, so that the failure load value can more accurately reflect the stress condition of the front shock absorber support 100, improving the test accuracy. Furthermore, by comparing the measured value with the theoretical critical value, a calibration basis for stress simulation is provided, so that stress simulation can provide a theoretical basis for the front shock absorber support 100, further reducing costs.
[0068] The above description of the embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A method for testing the strength of a front shock absorber bearing, characterized in that, include: Pre-treatment of the front shock absorber support (100); Stress analysis was performed on the front shock absorber support (100), and at least one stress test point was determined based on the stress analysis results; Stress patches are attached to the locations of the stress test points; The frame (200) portion with the aforementioned front shock absorber mount (100) is constrained to the platform; By using a loading device, a load is applied to the front shock absorber support (100) along the axial direction of the shock absorber installed on the front shock absorber support (100) until the front shock absorber support (100) fails, and the load value of the stress patch at the time of failure is recorded. The load value of the stress patch at the time of failure obtained by actual measurement is compared with the theoretical critical value of the same stress test point obtained by stress analysis.
2. The method for testing the strength of the front shock absorber support according to claim 1, characterized in that, Pretreatment of the front shock absorber support (100) includes: The dimensions of the front shock absorber support (100) were inspected to confirm that they were within tolerance.
3. The method for testing the strength of the front shock absorber support according to claim 1, characterized in that, The stress test points include a first stress test point (110), a second stress test point (120), a third stress test point (130), and a fourth stress test point (140). The first stress test point (110) and the second stress test point (120) are both located on the mounting end face of the front shock absorber support (100); The third stress test point (130) is located on the inner side of the front shock absorber support (100); The fourth stress test point (140) is located on the connecting slope of the front shock absorber support (100).
4. The method for testing the strength of the front shock absorber support according to claim 1, characterized in that, The constraint positions of the frame (200) include a first support position (210) located at the front end of the frame (200) and a second support position (220) located at the rear end of the frame (200). The front shock absorber support (100) is located between the first support position (210) and the second support position (220).
5. The method for testing the strength of the front shock absorber support according to claim 1, characterized in that, The load applied by the loading device to the front shock absorber support (100) is a stepped-increasing cyclic load; The initial load value is 4 kN, and the step increase value is 10 kN.
6. The method for testing the strength of the front shock absorber support according to claim 5, characterized in that, During the loading process, the measured values of the stress patch at the stress test point are collected in real time and the loading continues until the front shock absorber support (100) fails.
7. The method for testing the strength of the front shock absorber support according to claim 5, characterized in that, The cyclic load is applied at a frequency of 5 Hz.
8. The method for testing the strength of the front shock absorber support according to claim 1, characterized in that, The stress test point is the corresponding area where the stress patch is pasted, and its size is an 8mm*8mm square.
9. The method for testing the strength of the front shock absorber support according to claim 1, characterized in that, The load value of the stress patch at the time of failure, obtained by actual measurement, is compared with the theoretical critical value of the same stress test point obtained by stress analysis. Specifically, this includes: Stress analysis was performed using a CAE model; When the deviation between the two is within a preset threshold, the CAE model used in the stress analysis is determined to be accurate. The structure of the front shock absorber support (100) is optimized using the CAE model with accurate judgment.
10. The method for testing the strength of the front shock absorber support according to claim 1, characterized in that, It also includes a control system, which is communicatively connected to the loading device and the stress patch; The control system is used to control the loading device to apply the load and to synchronously receive and record the stress data collected by the stress patch.