A test method for wheel arch bending deformation considering high-speed wind pressure

Abstract

This invention provides a wheel arch bending deformation test method considering high-speed wind pressure, comprising: obtaining standard-state wind pressure data of the wheel arch under theoretical conditions based on vehicle theoretical data and environmental model data; reading data of the unsealed air guide component after removing the sealing rubber on the front air guide component; replacing the air guide component data in the vehicle theoretical data with the unsealed air guide component data to obtain the wheel arch's ultimate wind pressure data when the seal fails; subjecting the wheel arch to be tested to preset environmental conditions; marking the test area on the wheel arch according to the ultimate wind pressure area, and deploying a force application device and a displacement sensor at a location suitable for the test area; driving the force application device to push the wheel arch to deform it; acquiring the wheel arch deformation displacement data collected by the displacement sensor; and determining the amount of wheel arch deformation. The test method described in this invention can effectively verify the high-speed wind pressure deformation of the wheel arch and promptly identify potential risks to the wheel arch.

Description

Technical Field

[0001] This invention belongs to the field of vehicle component quality inspection technology, specifically relating to a wheel arch bending deformation test method that takes into account high-speed wind pressure. Background Technology

[0002] During high-speed vehicle operation, the wheel arches inevitably experience sealing issues due to the air intake channels such as the grille. Airflow enters the engine compartment through the intake system, passes through the compartment channels, and blows onto the wheel arches, causing deformation due to wind pressure. Severe deformation can lead to friction between the wheel arch and the tire, resulting in wear and tear, quality complaints, and safety risks. Currently, verification of this issue relies on whole-vehicle wind tunnel testing or high-speed environmental testing, which is highly limited by testing resources. Verifying wheel arch deformation under wind pressure through whole-vehicle testing has the following drawbacks: First, the testing cost is high, requiring a full vehicle test for each test; second, whole-vehicle testing has many requirements, necessitating specialized test tracks or wind tunnel laboratories, resulting in numerous limitations. Furthermore, in the early stages of a project, whole-vehicle testing is constrained by the overall vehicle production schedule, and testing plans are often scheduled late in the project. Late testing plans can lead to tight optimization schedules and additional optimization costs after problems are discovered, increasing overall production costs.

[0003] Invention Patent Content

[0004] To address the aforementioned problems, this invention provides a wheel arch bending deformation test method considering high-speed wind pressure. This method can be used for single-piece testing of wind pressure deformation of automotive wheel arches. It uses simulation to provide the theoretical and ultimate wind pressure of the wheel arch, as well as the magnitude, location, and direction of the corresponding forces. This data serves as the input for the test standard. Corresponding testing fixtures are designed to complete the wheel arch bending force test, achieving the goal of verifying high-speed wind pressure deformation of the wheel arch using single-piece testing instead of whole-vehicle testing. The objective of this invention is achieved through the following technical solutions:

[0005] This invention provides a test method for wheel arch bending deformation considering high-speed wind pressure, comprising:

[0006] Step S100: Based on the theoretical data of the whole vehicle and the environmental model data, obtain the standard wind pressure data of the wheel arch under theoretical conditions. The wind pressure data includes the standard wind pressure area. The theoretical data of the whole vehicle includes the assembly status data of the whole vehicle and the structure and material data of the wheel arch, as well as the data of the air guide and other related components that can affect the service life of the wheel arch. The environmental model data includes airflow data and ambient temperature data.

[0007] Step S200: Read the data of the unsealed air guide after removing the sealing soft rubber on the front air guide, and replace the vehicle assembly status data of the air guide in the vehicle theoretical data in step S100 with the data of the unsealed air guide. Obtain the wheel cover limit wind pressure data when the seal fails. The limit wind pressure data includes the limit wind pressure area, the limit wind pressure value and the limit wind pressure direction.

[0008] Step S300: Place the wheel cover under test in an environmental chamber with preset environmental conditions and keep it for a first preset time, then remove the wheel cover from the environmental chamber and allow it to return to a second preset time;

[0009] Step S400: Based on the extreme wind pressure area in step S200, mark the test area on the wheel cover after completing step S300, and install the force application device and displacement sensor at the location appropriate to the test area. Drive the force application device to push the wheel cover to deform it according to the extreme wind pressure value and extreme wind pressure direction obtained in step S200, until the wheel cover no longer deforms due to the force applied by the force application device.

[0010] Step S500: Obtain the wheel cover deformation displacement data collected by the displacement sensor, and determine the deformation amount of the wheel cover based on the wheel cover deformation displacement data.

[0011] Furthermore, in step S300: a wheel cover fixing fixture is made according to the installation structure during vehicle assembly, the wheel cover is fixed on the fixing fixture, and placed in an environmental chamber with preset environmental conditions for a first preset time. Then, the wheel cover and the fixing fixture are removed from the environmental chamber and allowed to recover to a second preset time in a natural state.

[0012] Furthermore, it also includes step S600: performing a visual inspection on the wheel cover after completing step S400 to determine whether it has been damaged and / or malfunctioning.

[0013] Furthermore, in step S100, the wind pressure data includes the standard wind pressure area, the standard wind pressure value, and the standard wind pressure direction.

[0014] Furthermore, in step S400, the driving force application device pushes the wheel cover with a constant force to deform it until the wheel cover no longer deforms due to the force applied by the force application device. The force value of the constant force is the ultimate wind pressure value obtained in step S200.

[0015] Furthermore, step S100 includes:

[0016] Step S110: Read the theoretical data of the whole vehicle and establish a structural model of the whole vehicle assembly condition including wheel cover and air guide component data;

[0017] Step S120: Call the airflow simulation software to establish an environmental model, simulate the stress condition of the wheel cover structure model under wind pressure, and complete the parameter settings for wheel cover material and test temperature in the airflow simulation software.

[0018] Step S130: Output the standard wind pressure data of the wheel cover under theoretical conditions based on the simulation results.

[0019] Furthermore, it also includes step S700: generating and outputting wheel cover bending performance evaluation results based on the result data obtained from steps S100, S200 and S500.

[0020] The beneficial effects of the present invention are as follows: the test method and test equipment described in the present invention can replace the high-speed test of the whole vehicle, effectively verify the high-speed wind pressure deformation of the wheel cover, effectively verify the quality of the wheel cover before the whole vehicle test, and promptly identify potential risks of the wheel cover. Attached Figure Description

[0021] Figure 1 The diagram shown is a schematic representation of the wind pressure data output results of this invention.

[0022] Figure 2 The diagram shown illustrates the measurement of wheel cover deformation using a displacement sensor and force application device as described in this invention.

[0023] In the diagram: 1-Force application device; 2-Displacement sensor; 3-Wheel cover; A-Area subjected to wind pressure. Detailed Implementation

[0024] The technical solutions of the preferred embodiments of the present invention will now be clearly and completely described. Obviously, the described embodiments are merely a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] Example 1:

[0026] This embodiment provides a test method for wheel arch bending deformation considering high-speed wind pressure, which includes:

[0027] Step S100: Based on the theoretical data of the whole vehicle and the environmental model data, obtain the standard wind pressure data of the wheel arch under theoretical conditions. The wind pressure data includes the standard wind pressure area. The theoretical data of the whole vehicle includes the assembly status data of the whole vehicle and other relevant components that can affect the service life of the wheel arch, such as the air guide, as well as the structure and material data of the wheel arch. The environmental model data includes airflow data and ambient temperature data. Preferably, the standard wind pressure data also includes the standard wind pressure value and the standard wind pressure direction.

[0028] Step S200: Read the data of the unsealed air guide after removing the sealing soft rubber on the front air guide, and replace the vehicle assembly status data of the air guide in the vehicle theoretical data in step S100 with the data of the unsealed air guide. Obtain the wheel cover limit wind pressure data when the seal fails. The limit wind pressure data includes the limit wind pressure area A, the limit wind pressure value F and the limit wind pressure direction.

[0029] Step S300: Place the wheel cover under test in an environmental chamber with preset environmental conditions and keep it for a first preset time, then remove the wheel cover from the environmental chamber and allow it to return to a second preset time;

[0030] Step S400: Based on the extreme wind pressure area obtained in step S200, mark the test area on the wheel cover after completing step S300, and install a force application device and displacement sensor at the appropriate location for the test area. Drive the force application device to push the wheel cover to deform it according to the extreme wind pressure value and extreme wind pressure direction obtained in step S200, until the wheel cover no longer deforms due to the force applied by the force application device; preferably, drive the force application device to push the wheel cover to deform it with a constant force F until the wheel cover no longer deforms due to the force applied by the force application device, wherein the constant force value is the extreme wind pressure value obtained in step S200.

[0031] Step S500: Obtain the wheel cover deformation displacement data collected by the displacement sensor, and determine the deformation amount of the wheel cover based on the wheel cover deformation displacement data.

[0032] In a preferred embodiment, in step S300: a wheel cover fixing fixture is made according to the installation structure during vehicle assembly, the wheel cover is fixed on the fixing fixture, and placed in an environmental chamber with preset environmental conditions for a first preset time, and then the wheel cover and the fixing fixture are taken out from the environmental chamber and allowed to recover in a natural state for a second preset time.

[0033] In a preferred embodiment, the method further includes step S600: visually inspecting the wheel cover after step S400 to determine whether it has been damaged and / or malfunctioning.

[0034] In a preferred embodiment, step S100 includes:

[0035] Step S110: Read the theoretical data of the whole vehicle and establish a wheel cover working condition structural model including wheel cover and air guide component data;

[0036] Step S120: Call the airflow simulation software to establish an environmental model, simulate the stress condition of the wheel cover structure model under wind pressure, and complete the parameter settings for wheel cover material and test temperature in the airflow simulation software.

[0037] Step S130: Output the standard wind pressure data of the wheel cover under theoretical conditions based on the simulation results.

[0038] In a preferred embodiment, the method further includes step S700: generating and outputting wheel cover bending performance evaluation results based on the result data obtained in steps S100, S200 and S500; preferably, all parameters and related measurement results of all test steps are objectively recorded, generating a parameter and result form about the test process, and establishing a related database.

[0039] Example 2:

[0040] This embodiment provides a complete experimental process implementation plan based on Embodiment 1, which includes the following steps:

[0041] Step S110: Based on the theoretical data of the whole vehicle, establish a data model including wheel arches and all related environmental components.

[0042] Step S120: Import the data model into airflow simulation software (such as Masterfluid), and define parameters such as wheel cover material and test temperature, as well as the output parameters of the simulation results (including parameters such as wind pressure area, wind pressure value and wind pressure direction).

[0043] Step S130: Complete the simulation structure of the theoretical data, and output the wind pressure area, force value, and direction of the wheel arch under the theoretical state, such as... Figure 1 As shown.

[0044] Step 200: Create data for the unsealed air guide component after removing the sealing rubber from the front air guide component, and replace the air guide component data in the original theoretical model with the data of the unsealed air guide component. Repeat the above steps S110, S120 and S130 to obtain the ultimate wind pressure area, ultimate wind pressure value and ultimate wind pressure direction of the wheel cover when the seal fails.

[0045] Step 300 specifically includes the contents of steps S301 to S304:

[0046] Step S301: Make tooling for mounting and fixing wheel covers. The fixing position and stress conditions must be consistent with the overall vehicle assembly state.

[0047] Step S302: Select the wheel cover for the test and perform a pre-test inspection;

[0048] Step S303: Fix the wheel cover on the mounting fixture and place it in an environmental chamber with preset environmental conditions. Store it under the specified storage conditions for a first preset time. The environmental chamber used here is a room temperature and humidity test chamber, a high and low temperature cycling test chamber, etc., according to the test requirements.

[0049] Step S304: After the specified test time (i.e., the first preset time), remove the wheel cover and tooling from the environmental chamber, restore the second preset time, and then proceed to the subsequent step S400.

[0050] Step S400 includes the contents of steps S401 to S405:

[0051] Step S401: Based on the simulation results of step S200 showing the extreme wind pressure area, mark the test area on the wheel cover test piece.

[0052] Step S402: Install displacement sensor 2 inside the wheel cover and place the probe of the displacement sensor close to the inner wall of the wheel cover in a free state so that the deformation data can be measured in time when the wheel cover deforms.

[0053] Step S403: Place the force application device 1 (indenter with a force sensor) in the test area marked on the wheel cover in step S401, and arrange the indenter of the force application device and the probe of the displacement sensor on opposite sides of the wheel cover 3 to be tested, as shown below. Figure 2 As shown, when the driving pressure head applies force to the wheel cover, the probe of the displacement sensor located on the other side of the wheel cover 3 moves under the pressure of the wheel cover deformation, thereby measuring the deformation data of the deformed wheel cover;

[0054] Step S405: Debug the signal collection and control device of the displacement sensor and the mechanical sensor to ensure that the system is working properly;

[0055] Step S406: Based on the extreme wind pressure value and extreme wind pressure direction obtained from the simulation results, push the pressure head of the force application device with a constant force value until the wheel cover no longer deforms.

[0056] Step S500: Check the displacement data collected by the displacement sensor to determine the deformation of the wheel cover.

[0057] Step S600: Perform a visual inspection of the wheel arches to check for damage / malfunction, and evaluate and process all collected measurement data.

[0058] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention; the dimensions described in the drawings and embodiments are not related to the specific physical object and are not used to limit the protection scope of the present invention. The physical dimensions can be selected and changed according to actual needs.

Claims

1. A test method for wheel arch bending deformation considering high-speed wind pressure, characterized in that, include: Step S100: Based on the theoretical data of the whole vehicle and the environmental model data, obtain the standard wind pressure data of the wheel arch under theoretical conditions. The wind pressure data includes the standard wind pressure area. The theoretical data of the whole vehicle includes the whole vehicle assembly state data of the air guide and the structure and material data of the wheel arch. The environmental model data includes airflow data and ambient temperature data. Step S200: Read the data of the unsealed air guide after removing the sealing soft rubber on the front air guide, and replace the vehicle assembly status data of the air guide in the vehicle theoretical data in step S100 with the data of the unsealed air guide. Obtain the ultimate wind pressure data of the wheel cover when the seal fails. The ultimate wind pressure data includes the ultimate wind pressure area, the ultimate wind pressure value and the ultimate wind pressure direction. Step S300: Place the wheel cover under test in an environmental chamber with preset environmental conditions and keep it for a first preset time, then remove the wheel cover from the environmental chamber and allow it to return to a second preset time; Step S400: Based on the extreme wind pressure area in step S200, mark the test area on the wheel cover after completing step S300, and install the force application device and displacement sensor at the location appropriate to the test area. Drive the force application device to push the wheel cover to deform it according to the extreme wind pressure value and extreme wind pressure direction obtained in step S200, until the wheel cover no longer deforms due to the force applied by the force application device. Step S500: Obtain the wheel cover deformation displacement data collected by the displacement sensor, and determine the deformation amount of the wheel cover based on the wheel cover deformation displacement data.

2. The wheel arch bending deformation test method considering high-speed wind pressure according to claim 1, characterized in that, In step S300: a wheel cover fixing fixture is made according to the installation structure during vehicle assembly. The wheel cover is fixed on the fixing fixture and placed in an environmental chamber with preset environmental conditions for a first preset time. Then, the wheel cover and the fixing fixture are removed from the environmental chamber and allowed to recover to a second preset time in a natural state.

3. The wheel arch bending deformation test method considering high-speed wind pressure according to claim 1, characterized in that, It also includes step S600: performing a visual inspection on the wheel cover after completing step S400 to determine whether it has been damaged and / or malfunctioning.

4. The wheel arch bending deformation test method considering high-speed wind pressure according to claim 1, characterized in that, In step S100, the wind pressure data includes the standard wind pressure area, the standard wind pressure value, and the standard wind pressure direction.

5. The wheel arch bending deformation test method considering high-speed wind pressure according to claim 1, characterized in that, In step S400, the driving force application device pushes the wheel cover with a constant force to deform it until the wheel cover no longer deforms due to the force applied by the force application device. The force value of the constant force is the ultimate wind pressure value obtained in step S200.

6. The wheel arch bending deformation test method considering high-speed wind pressure according to claim 1, characterized in that, Step S100 includes: Step S110: Read the theoretical data of the whole vehicle and establish a structural model of the whole vehicle assembly condition including wheel cover and air guide component data; Step S120: Call the airflow simulation software to establish an environmental model and simulate the stress condition of the wheel cover structure model under wind pressure. Complete the parameter settings for wheel cover material and test temperature in the airflow simulation software. Step S130: Output the standard wind pressure data of the wheel cover under theoretical conditions based on the simulation results.

7. A test method for wheel arch bending deformation considering high-speed wind pressure according to any one of claims 1 to 6, characterized in that, It also includes step S700: generating and outputting the wheel cover bending performance evaluation results based on the result data obtained from steps S100, S200 and S500.

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