Simulation evaluation method, device and equipment for wear state of sealing rubber strip and medium

Abstract

The invention relates to the technical field of product design and simulation, in particular to a sealing rubber strip abrasion state simulation evaluation method, device and equipment and a medium, and the method comprises the steps that geometric data of the section of a sealing rubber strip and the section of a corresponding metal plate are acquired, and a corresponding finite element analysis model is established based on the geometric data; applying a displacement amount corresponding to the target direction to the finite element analysis model to generate a corresponding pre-pressing analysis result, and adjusting the finite element analysis model according to the pre-pressing analysis result; and on the basis of the adjusted finite element analysis model, applying a movement speed to a sheet metal section rigid body to generate a corresponding dynamic transient analysis result, and evaluating the wear state of the sealing rubber strip according to the transient analysis result. Therefore, the problems that in the prior art, temporary remedial measures are generally adopted only after abrasion occurs, and the abrasion resistance cannot be fundamentally improved are solved.

Description

Technical Field

[0001] This application relates to the field of product design and simulation technology, and in particular to a simulation evaluation method, device, equipment and medium for the wear state of sealing strips. Background Technology

[0002] In the field of automotive engineering, door sealing strips are key components ensuring the overall sealing performance of a vehicle. They are subject to repeated compression, friction, and environmental factors during the opening and closing of doors, making them prone to wear. With prolonged use, wear on the sealing strips can lead to seal failure, resulting in increased interior noise, rainwater infiltration, and dust intrusion, severely impacting the performance of electronic devices and the user experience.

[0003] Currently, the treatment of sealing strip wear problems is mostly reactive, such as using surface coatings for short-term improvement after obvious wear occurs. There is a lack of effective means to systematically predict and avoid the risk of sealing strip wear in the early stages of product development. This makes it impossible to effectively improve the wear resistance of sealing strips or predict whether the wear resistance of sealing strips can meet the performance requirements under design conditions in the early stages of project implementation. Summary of the Invention

[0004] This application provides a simulation evaluation method, apparatus, equipment, medium, and procedure for the wear state of sealing strips, in order to solve the problems in related technologies where only temporary remedial measures are usually taken after wear occurs, which cannot fundamentally improve their wear resistance.

[0005] The first aspect of this application provides a simulation evaluation method for the wear state of a sealing strip, comprising the following steps: acquiring geometric data of the sealing strip cross section and the corresponding sheet metal cross section, and establishing a corresponding finite element analysis model based on the geometric data; performing a pre-compression analysis on the finite element analysis model to generate corresponding pre-compression analysis results, and adjusting the finite element analysis model according to the pre-compression analysis results; applying a velocity load to the rigid body of the sheet metal cross section based on the adjusted finite element analysis model to generate corresponding dynamic transient analysis results, and evaluating the wear state of the sealing strip according to the dynamic transient analysis results.

[0006] Optionally, performing a pre-compression analysis on the finite element analysis model to generate corresponding pre-compression analysis results includes: obtaining a preset compression amount between the sealing strip and the sheet metal; decomposing the preset compression amount into a first displacement component in the horizontal direction and a second displacement component in the vertical direction; applying a corresponding displacement amount to the sheet metal in the finite element analysis model based on the first displacement component and the second displacement component until the deformed body of the sealing strip reaches the preset compression amount, thereby generating corresponding pre-compression analysis results.

[0007] Optionally, adjusting the finite element analysis model based on the pre-compression analysis results includes: identifying the compression deformation results of the sealing strip in the pre-compression analysis results; calculating a first difference between the compression deformation results of the sealing strip in the pre-compression analysis results and the true value of the actual deformation of the sealing strip; and adjusting the finite element analysis model based on the first difference.

[0008] Optionally, the step of applying a velocity load to the rigid body of the sheet metal section to generate corresponding dynamic transient analysis results includes: obtaining the motion parameters, contact relationship pairs, and velocity load boundary conditions of the sheet metal relative to the sealing strip under actual working conditions; activating the finite element analysis model based on the motion parameters, the contact relationship pairs, and the velocity load boundary conditions; applying a velocity load to the rigid body of the sheet metal section to generate a target curve for the measurement points on the sealing strip; and generating corresponding dynamic transient analysis results based on the target curve, wherein the target curve is a displacement and time curve.

[0009] Optionally, evaluating the wear state of the sealing strip based on the dynamic transient analysis results includes: calculating the minimum tangential wear displacement of the sealing strip based on the dynamic transient analysis results; calculating a second difference between the minimum tangential wear displacement and the sheet metal misalignment at the corresponding position; and optimizing the structure or coating of the sealing strip based on the second difference.

[0010] Optionally, obtaining the geometric data of the sealing strip cross section and the corresponding sheet metal cross section includes: determining multiple analysis positions at target intervals along the assembly trajectory of the sealing strip on the vehicle body door frame; cutting a cutting plane perpendicular to the central axis of the sealing strip according to each analysis position; and identifying the geometric data of the sealing strip cross section and the corresponding sheet metal cross section at each analysis position.

[0011] A second aspect of this application provides a simulation evaluation system for the wear state of a sealing strip, used to implement the simulation evaluation method for the wear state of a sealing strip as described in the above embodiments. The system includes: a model building module for acquiring geometric data of the sealing strip cross-section and the corresponding sheet metal cross-section, and establishing a corresponding finite element analysis model based on the geometric data, wherein the sealing strip is set as a deformable body and the corresponding sheet metal cross-section is set as a rigid body; a pre-compression analysis module for performing pre-compression analysis on the finite element analysis model to generate corresponding pre-compression analysis results, and adjusting the finite element analysis model according to the pre-compression analysis results; and a wear analysis module for applying a velocity load to the rigid body of the sheet metal cross-section based on the adjusted finite element analysis model to generate corresponding dynamic transient analysis results, and evaluating the wear state of the sealing strip based on the dynamic transient analysis results.

[0012] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the simulation evaluation method for the wear state of sealing strips as described in the above embodiments.

[0013] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement a simulation evaluation method for the wear state of sealing strips as described in the above embodiments.

[0014] A fifth aspect of this application provides a computer program product, including a computer program that, when executed, is used to implement a simulation evaluation method for the wear state of sealing strips as described in the above embodiments.

[0015] Therefore, this application has at least the following beneficial effects: This application embodiment can accurately simulate the pressure and friction state of the sealing strip in actual use by establishing a refined finite element model of the sealing strip and the sheet metal cross-section in the early stage of design. Combined with pre-compression analysis and dynamic transient analysis, the minimum tangential wear displacement of the sealing strip at each key position can be effectively obtained and compared with the sheet metal misalignment. This allows for the early identification of potential wear risks, guiding the optimization of the sealing strip cross-sectional structure or the selection of surface coatings, significantly improving the wear resistance and service life of the sealing strip, avoiding problems such as sealing failure, abnormal noise, and water leakage caused by wear in the later stage, reducing rectification costs and improving the overall vehicle quality.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart illustrating a simulation evaluation method for the wear state of a sealing strip according to an embodiment of this application; Figure 2 This is a schematic diagram of the simulation method analysis process for avoiding wear of sealing strips according to the embodiments of this application; Figure 3 This is a schematic diagram of the sealing strip and sheet metal cross-section structure according to an embodiment of this application; Figure 4 This is a simplified schematic diagram illustrating an equivalent modeling method for the sealing strip cross-section and sheet metal cross-section according to embodiments of this application. Figure 5This is a schematic diagram of the time and displacement curves of the sealing strip measurement points according to an embodiment of this application; Figure 6 This is a block diagram of a simulation evaluation system for the wear state of sealing strips according to an embodiment of this application; Figure 7 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0019] In the entire technical field of sealing strips, the related technology (1) has conducted in-depth research on the material constitutive structure of sealing strips, pointed out the methods for obtaining the hyperelastic and viscoelastic parameters of sealing strips, and how to obtain the elastic-plastic parameters by experimental methods, and improved the creation of the finite element model of sealing strips to study the influence of the pressure deformation of sealing strips on abnormal vibration of car doors in a more realistic way.

[0020] Related technology (2) introduces a method for detecting the wear of sealing door rubber strips. The wear degree of the rubber strip is obtained through a data processing method with specific functions. First, the rebound speed sequence and rebound depth sequence are fitted to obtain multiple straight lines. The rebound speed attenuation index and rebound depth attenuation index are calculated based on the difference in the slope of the straight lines to obtain multiple wear evaluation values.

[0021] To overcome the shortcomings of existing technologies, this invention proposes a simulation method to avoid the wear location of sealing strips. This method is applied in the early stages of a project to identify and eliminate potential risks, avoiding the need for multiple rectifications later on. This significantly extends the service life of the sealing strips and reduces quality issues related to sealing strip wear. The following describes, with reference to the accompanying drawings, a simulation evaluation method, apparatus, device, medium, and procedure for the wear state of sealing strips according to embodiments of this application.

[0022] Specifically, Figure 1 This is a schematic flowchart illustrating a simulation evaluation method for the wear state of a sealing strip provided in an embodiment of this application.

[0023] like Figure 1 As shown, the simulation evaluation method for the wear state of the sealing strip includes the following steps: In step S101, the geometric data of the sealing strip cross section and the corresponding sheet metal cross section are obtained, and the corresponding finite element analysis model is established based on the geometric data. The geometric data of the sealing strip is set as a deformable body, and the geometric data of the corresponding sheet metal cross section is set as a rigid body. It is understood that the embodiments of this application can obtain the geometric data of the sealing strip and the corresponding sheet metal section and establish a finite element analysis model, setting the sealing strip as a deformable body and the sheet metal section as a rigid body, which can realistically restore the contact and deformation behavior of the two in the actual assembly and use process, effectively improve the physical accuracy of the simulation model, lay a reliable foundation for subsequent pre-compression state simulation and wear analysis, and thus accurately identify potential wear areas in the design stage.

[0024] In this embodiment of the application, obtaining the geometric data of the sealing strip cross section and the corresponding sheet metal cross section includes: determining multiple analysis positions at target intervals along the assembly trajectory of the sealing strip on the vehicle body door frame; cutting a cutting plane perpendicular to the central axis of the sealing strip according to each analysis position; and identifying the geometric data of the sealing strip cross section and the corresponding sheet metal cross section at each analysis position.

[0025] It is understood that the embodiments of this application can set multiple analysis positions at target intervals along the assembly trajectory of the sealing strip on the vehicle body door frame, and take a cross section perpendicular to its central axis at each position to obtain the geometric data of the sealing strip and the corresponding sheet metal. This can achieve fine modeling of the key areas of the entire sealing strip, ensure that the simulation analysis is comprehensive and representative, and significantly improve the spatial resolution and engineering practicality of wear prediction.

[0026] Specifically, the specific steps of this application embodiment are as follows: S1-1 Model data acquisition: The sealing strip is cut at a distance of 30mm-50mm on the vehicle body assembly. Each cut position is defined as the analysis position. The geometric data of the sealing strip cross section and the sheet metal cross section at the analysis position are output. A finite element model is built according to the cross section data. The sealing strip cross section is meshed with a basic mesh size of 0.5mm. The geometry of the sheet metal cross section is set as a rigid body.

[0027] S1-2 Finite Element Model Mesh Inspection: The mesh of the sealing strip and the metal skeleton in the cross section must strictly fit the cross section geometry without penetration. The aspect ratio of the quadrilaterals is less than 5, the mesh angle is greater than 30° and less than 135°, and the proportion of triangular elements in the mesh is less than 3%. If there are any elements that do not meet the quality requirements, make the corresponding adjustments.

[0028] In step S102, a preload analysis is performed on the finite element analysis model to generate the corresponding preload analysis results, and the finite element analysis model is adjusted according to the preload analysis results.

[0029] It is understood that the embodiments of this application can accurately simulate the initial compression deformation of the sealing strip in the actual assembly state by performing pre-compression analysis on the finite element analysis model and adjusting the model according to the results, thereby ensuring that the boundary conditions of the subsequent wear analysis are consistent with the actual working conditions, thus improving the reliability and accuracy of the simulation prediction.

[0030] In this embodiment of the application, the pre-compression analysis of the finite element analysis model generates the corresponding pre-compression analysis results, including: obtaining the preset compression amount between the sealing strip and the sheet metal; decomposing the preset compression amount into a first displacement component in the horizontal direction and a second displacement component in the vertical direction; and applying the corresponding displacement amount to the sheet metal in the finite element analysis model based on the first displacement component and the second displacement component until the deformed body of the sealing strip reaches the preset compression amount, thereby generating the corresponding pre-compression analysis results.

[0031] It is understood that the embodiments of this application can obtain the preset compression amount between the sealing strip and the sheet metal, and decompose it into horizontal and vertical displacement components. Based on this, the sheet metal in the finite element model is subjected to corresponding displacement, so that the deformable body of the sealing strip accurately reaches the compression state required by the design. This can realistically restore the assembly pre-compression condition, ensure that the initial simulation conditions are consistent with the actual physical state, and thus improve the accuracy of subsequent wear analysis.

[0032] In this embodiment of the application, adjusting the finite element analysis model based on the pre-compression analysis results includes: identifying the compression deformation results of the sealing strip in the pre-compression analysis results; calculating the first difference between the compression deformation results of the sealing strip in the pre-compression analysis results and the true value of the actual deformation of the sealing strip; and adjusting the finite element analysis model based on the first difference.

[0033] It is understood that the embodiments of this application can identify the compression deformation result of the sealing strip in the pre-compression analysis, calculate the first difference between it and the actual deformation true value, and correct the finite element analysis model accordingly. This can effectively improve the model's ability to reproduce real physical behavior, make the simulation state closer to the actual assembly conditions, and thus enhance the accuracy and reliability of subsequent wear assessment.

[0034] Specifically, the position adjustment of the S2-1 finite element model involves translating and moving the mesh of the sealing strip section so that it is in a state of almost-but not in contact with the rigid body of the sheet metal section. S2-2 Creating Contact Relationships: Create contact bodies for the sealing strip cross-section mesh and sheet metal cross-section lines. The sealing strip cross-section mesh is set as a deformable body, and the sheet metal cross-section lines are set as rigid bodies. The contact between the sealing strip and the sheet metal requires setting the contact relationship between the deformable body and the rigid body. The friction coefficient in the contact relationship depends on the material of the sealing strip and the coating on the sheet metal surface. The friction parameters between the sealing strip and the sheet metal should be obtained by experimental testing. In the contact characteristics, select normal contact. The established contact pairs are deformable body and rigid body, and deformable body and deformable body. S2-3 Material Parameter Settings: In the analysis model, since the sheet metal section line has been set as a rigid body, the metal skeleton of the sealing strip is directly assigned the parameter properties of the corresponding metal material. Set the corresponding mass density, Young's modulus, Poisson's ratio, etc. of the metal material. Set the material type of the sealing strip to "Mooney". The model uses a single mesh. The five parameters of the model can be set according to the material parameter curves of the test, C10, C01, and C11. The above sealing strip material parameters should be obtained from the corresponding material test. S2-4 Boundary Condition Setting: After assigning material properties, boundary conditions and working conditions need to be given. At the boundary conditions, displacement constraints are applied to the sealing strip clamp. Since the analysis is a two-dimensional planar analysis, it is only necessary to constrain the horizontal and vertical displacements of the sealing strip clamp. S2-5 Pre-compression analysis: Based on the compression amount of the sealing strip fed back from the design status, the compression amount is decomposed into the horizontal and vertical directions, forced displacement is applied, and pre-compression analysis is performed to ensure that the contact compression between the sealing strip and the sheet metal reaches the design state. S2-6 Pre-compression condition judgment: After the pre-compression analysis is completed, determine whether the pressure deformation of the sealing strip is consistent with the actual deformation of the sealing strip. If it is reasonable, the pre-compression condition analysis is considered to be completed. If the deformation is significantly different from the actual deformation, check the forced displacement in the horizontal and vertical directions and adjust the model.

[0035] In step S103, based on the adjusted finite element analysis model, a velocity load is applied to the rigid body of the sheet metal section to generate the corresponding dynamic transient analysis results, and the wear state of the sealing strip is evaluated based on the dynamic transient analysis results.

[0036] It is understood that the embodiments of this application can apply velocity loads to the rigid body of the sheet metal section based on the adjusted finite element analysis model, and carry out dynamic transient analysis. This can realistically simulate the relative sliding behavior between the sealing strip and the sheet metal during the opening and closing of the door, accurately obtain the displacement and velocity response of the contact area, and thus quantitatively assess the wear risk of the sealing strip at each analysis position, providing a reliable basis for structural optimization and material selection.

[0037] In this embodiment of the application, applying a velocity load to a rigid sheet metal section to generate corresponding dynamic transient analysis results includes: obtaining the motion parameters, contact relationship pairs, and velocity load boundary conditions of the sheet metal relative to the sealing strip under actual working conditions; activating the finite element analysis model based on the motion parameters, contact relationship pairs, and velocity load boundary conditions; applying a velocity load to the rigid sheet metal section to generate a target curve for the measurement points on the sealing strip; and generating corresponding dynamic transient analysis results based on the target curve, wherein the target curve is a displacement and time curve.

[0038] It is understood that the embodiments of this application can obtain the motion parameters, contact relationships, and velocity load boundary conditions of the sheet metal relative to the sealing strip under actual working conditions, and activate the finite element analysis model accordingly. The velocity load is applied to the rigid body of the sheet metal section to generate the displacement-time curve of the sealing strip measurement point. This can accurately simulate the dynamic friction behavior between the sealing strip and the sheet metal during the actual opening and closing of the door, thereby obtaining high-precision dynamic transient analysis results and providing a reliable time-domain response basis for wear state assessment.

[0039] Specifically, the working condition settings for the S3-1 sealing strip wear analysis are as follows: After completing the pre-compression analysis, the working condition settings for the sealing strip wear analysis are performed. The type is selected as dynamic transient analysis. On the analysis working condition characteristic panel, load and contact are activated, the overall working condition time is set to 1, and a fixed step size of 0.02 is used. S3-2 Speed ​​Loading: To apply speed loading to the rigid body of the sheet metal section line, select Speed ​​in the Contact Body Control Type on the Rigid Body Contact Body Properties panel, and then click Parameters to set the parameters. S3-3 Sealing Strip Wear Analysis Task Settings: Activate the previously created structural analysis case and the velocity load, then click the check button to check the model and begin the analysis.

[0040] In this embodiment of the application, the wear state of the sealing strip is evaluated based on the results of dynamic transient analysis, including: calculating the minimum tangential wear displacement of the sealing strip based on the results of dynamic transient analysis; calculating the second difference between the minimum tangential wear displacement and the sheet metal misalignment at the corresponding position; and optimizing the structure or coating of the sealing strip based on the second difference.

[0041] It is understood that the embodiments of this application can calculate the minimum tangential wear displacement of the sealing strip through the results of dynamic transient analysis, and compare it with the sheet metal misalignment at the corresponding position to obtain the second difference value. This can quantitatively identify the degree of wear risk in each area, and then optimize the structural design or surface coating scheme of the sealing strip in a targeted manner, effectively improving its wear resistance and service life, and reducing the risk of sealing failure caused by wear.

[0042] Specifically, based on the above analysis results, the minimum tangential frictional wear displacement is calculated, the obtained value is evaluated, and compared with the sheet metal misalignment at the corresponding position. When the obtained minimum tangential wear displacement is greater than or equal to the sheet metal misalignment, it is considered qualified. When the minimum tangential wear displacement is less than the sheet metal misalignment, it is considered unqualified. When it is unqualified, the cross-section of the sealing strip needs to be optimized or the coating on the surface of the sealing strip needs to be re-adapted and selected.

[0043] According to the simulation evaluation method for the wear state of sealing strips proposed in this application, by establishing a refined finite element model of the sealing strip and the sheet metal cross-section, the pressure and friction state of the sealing strip in actual use can be accurately simulated in the early stage of design. Combined with pre-compression analysis and dynamic transient analysis, the minimum tangential wear displacement of the sealing strip at each key position can be effectively obtained and compared with the sheet metal misalignment. This allows for the early identification of potential wear risks, guiding the optimization of the sealing strip cross-sectional structure or the selection of surface coatings, significantly improving the wear resistance and service life of the sealing strip, avoiding problems such as sealing failure, abnormal noise, and water leakage caused by wear in the later stage, reducing rectification costs and improving the overall vehicle quality.

[0044] The following will combine Figures 2-5 The simulation evaluation method for the wear state of the sealing strip in this application is described in detail below: Step 1, S1-1: Obtain the CAD data of the sealing strip and the corresponding sheet metal part. For the sealing strip structure, lock the positions to be analyzed on the sealing strip at intervals of 30mm to 50mm. In CATIA software, cut at the analysis positions, with the cut surface perpendicular to the central axis of the sealing strip. Export the cross-sectional shape of the sealing strip and the cross-sectional lines of the sheet metal in CATIA software. A schematic diagram of the cut model wireframe is shown below. Figure 3 As shown; the cross-sectional shape of the sealing strip and the cross-sectional lines of the sheet metal are imported into MARC software. The cross-sectional shape of the sealing strip is then meshed. The base mesh size is 0.5mm. Both triangular and quadrilateral elements use plane strain full integration meshes. The triangular element type is set to 155, and the quadrilateral element type is set to 80, ensuring that the mesh strictly conforms to the cross-sectional shape of the sealing strip. The finite element model diagram is shown below. Figure 4 As shown; S1-2 Finite Element Model Mesh Check: The aspect ratio of quadrilaterals in the mesh is less than 5, the mesh angle is greater than 30° and less than 135°, and the proportion of triangular elements in the mesh is less than 3%. If there are any elements that do not meet the quality requirements, make the corresponding adjustments. Step 2, S2-1: Adjust the position of the sealing strip cross-section grid and the sheet metal cross-section line. In the MARC software, use the move command to translate and move the sealing strip cross-section grid so that it is in a state of almost contacting but not contacting the rigid body of the sheet metal cross-section. S2-2: Set up contact relationships. In the analysis, the sheet metal section line is set as a rigid body, and the sealing strip and metal frame are set as deformable bodies. Two pairs of contact relationships need to be established: deformable body and rigid body, and deformable body and deformable body. The establishment of the contact relationship includes: a. Contact body settings: the cross-section of the sealing strip and the cross-section of the metal skeleton are set as deformable bodies, and the sheet metal cross-section lines are set as rigid bodies; b. Establish contact pairs, deformable body and rigid body, deformable body and deformable body. The friction coefficient in the contact relationship is given based on the material of the sealing strip and the coating of the sheet metal surface. c. Create a contact table and activate the two contact relationships we need in the contact table: deformable body to deformable body and deformable body to rigid body.

[0045] S2-3: Assign material properties. Establish the corresponding material parameters according to the material grades specified in the BOM, and input the corresponding nonlinear stress-strain curve characteristics. Since this is a two-dimensional planar analysis, thickness attributes are not required for each component. It should be noted that due to differences between non-metallic material manufacturers, the material parameters, nonlinear curves, and material property curves of the sealing strip should be obtained through experimental testing to obtain accurate results. In the analysis model, since the sheet metal section line is already set as a rigid body, there is no need to assign material properties. The sealing strip section mesh is assigned according to the actual material. Generally, the sealing strip metal skeleton is directly assigned the corresponding metal material parameters, setting the metal material's mass density, Young's modulus, Poisson's ratio, etc. The sealing strip material type is set to Mooney. The model uses a single mesh, and the five model parameters are set to C10, C01, and C11 according to the experimentally tested material parameter curves. S2-4: Load step setting. After the material properties are assigned, the boundary conditions and working conditions need to be given. At the boundary conditions, displacement constraints are applied to the sealing strip clamp. Since the analysis is a two-dimensional planar analysis, it is only necessary to constrain the horizontal and vertical displacements of the sealing strip clamp. S2-5: Based on the compression amount of the sealing strip fed back from the design status, decompose the compression amount into the horizontal and vertical directions, apply forced displacement, and complete the pre-compression analysis of the sealing strip. S2-6: After the pre-compression analysis is completed, determine whether the deformation of the sealing strip under pressure is consistent with the actual deformation of the sealing strip. If it is reasonable, the pre-compression analysis is considered to be completed. If the deformation is significantly different from the actual deformation, check the forced displacement in the horizontal and vertical directions and adjust the model. Step 3, S3-1: After setting the boundary conditions, set the analysis case. Create a new structural analysis case, select dynamic transient analysis as the type, and activate load and contact on the analysis case characteristics panel. Set the overall case time to 1 and use a fixed step size of 0.02. S3-2: Apply speed loading to the rigid body of the sheet metal section line. On the rigid body contact body property panel, select speed in the contact body control type, and click parameters to set the horizontal and vertical loading speeds. S3-3: After setting the analysis conditions, you also need to create the analysis task, activate the previously created structural analysis conditions, activate the initial load, and click the check button to check the model and start the analysis. Step 4: Based on the above analysis results, solve for the minimum tangential frictional wear displacement. Figure 5 The time-displacement curve of the sealing strip measurement points is used to obtain the time it takes for the sealing strip to move with the sheet metal, and the minimum tangential frictional wear displacement is calculated. The minimum tangential frictional wear displacement s=v×t In the formula: v is the speed at which the sheet metal is loaded; t is the time it takes for the sealing strip to move with the sheet metal.

[0046] The obtained values ​​are evaluated and compared with the sheet metal misalignment at the corresponding position. If the minimum tangential wear displacement is greater than or equal to the sheet metal misalignment, it is considered qualified. If the minimum tangential wear displacement is less than the sheet metal misalignment, it is considered unqualified. If it is unqualified, the cross-section of the sealing strip needs to be optimized or the coating on the surface of the sealing strip needs to be re-adapted and selected. In summary, setting observation points at intervals of 30mm to 50mm on the sealing strip ensures sufficient precision and comprehensive analysis, enabling the identification and elimination of potential risks in the early stages of product design. This avoids the need for later improvements and increases in cost. By setting the contact between the sealing strip and the contact component in the finite element model, along with the friction coefficient of the surface motion of the sealing strip and the contact component, and the material properties of the sealing strip, the contact properties of the sealing strip under realistic conditions are simulated to the maximum extent. The transient analysis results are set as the velocity and displacement of the mesh nodes of the sealing strip cross-section. The velocity and displacement of the nodes in contact with the sheet metal are obtained, allowing the calculation of the minimum tangential wear displacement of the sealing strip cross-section at this location. Comparing the calculated minimum tangential wear displacement with the sheet metal misalignment at the observation point yields a friction and wear risk prediction result, mitigating the wear problem of the sealing strip. This approach is more instructive for practical engineering than simply predicting friction and wear risk based on relative velocity.

[0047] Next, with reference to the accompanying drawings, a simulation evaluation system for the wear state of sealing strips proposed according to an embodiment of this application is described.

[0048] Figure 6 This is a block diagram of a simulation evaluation system for the wear state of sealing strips according to an embodiment of this application.

[0049] like Figure 6 As shown, the simulation evaluation system 10 for the wear state of the sealing strip includes: a model building module 100, a pre-pressure analysis module 200, and a wear analysis module 300.

[0050] The model building module 100 is used to acquire the geometric data of the sealing strip cross section and the corresponding sheet metal cross section, and to build the corresponding finite element analysis model based on the geometric data. The geometric data of the sealing strip is set as a deformable body, and the geometric data of the corresponding sheet metal cross section is set as a rigid body. The pre-compression analysis module 200 is used to perform pre-compression analysis on the finite element analysis model to generate the corresponding pre-compression analysis results, and to adjust the finite element analysis model according to the pre-compression analysis results. The wear analysis module 300, based on the adjusted finite element analysis model, applies motion velocity to the rigid body of the sheet metal cross section to generate the corresponding dynamic transient analysis results, and evaluates the wear state of the sealing strip according to the transient analysis results.

[0051] It should be noted that the explanation of the above-mentioned simulation evaluation method for the wear state of sealing strips also applies to the simulation evaluation system for the wear state of sealing strips in this embodiment, and will not be repeated here.

[0052] The simulation evaluation system for the wear state of sealing strips proposed in this application establishes a refined finite element model of the sealing strip and the sheet metal cross-section. This allows for accurate simulation of the pressure and friction state of the sealing strip during actual use in the early design stages. Combined with pre-compression analysis and dynamic transient analysis, the system effectively obtains the minimum tangential wear displacement of the sealing strip at key locations and compares it with the sheet metal misalignment. This allows for early identification of potential wear risks, guiding the optimization of the sealing strip's cross-sectional structure or the selection of surface coatings. This significantly improves the wear resistance and service life of the sealing strip, preventing problems such as sealing failure, abnormal noise, and water leakage caused by wear later on, reducing rectification costs, and improving the overall vehicle quality.

[0053] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include: The memory 701, the processor 702, and the computer program stored on the memory 701 and executable on the processor 702.

[0054] When the processor 702 executes the program, it implements the simulation evaluation method for the wear state of the sealing strip provided in the above embodiments.

[0055] Furthermore, electronic devices also include: Communication interface 703 is used for communication between memory 701 and processor 702.

[0056] The memory 701 is used to store computer programs that can run on the processor 702.

[0057] The memory 701 may include high-speed RAM (Random Access Memory) memory, and may also include non-volatile memory, such as at least one disk storage.

[0058] If the memory 701, processor 702, and communication interface 703 are implemented independently, then the communication interface 703, memory 701, and processor 702 can be interconnected via a bus to complete communication between them. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 7 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0059] Optionally, in a specific implementation, if the memory 701, processor 702, and communication interface 703 are integrated on a single chip, then the memory 701, processor 702, and communication interface 703 can communicate with each other through an internal interface.

[0060] The processor 702 may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of this application.

[0061] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described simulation evaluation method for the wear state of sealing strips.

[0062] This application also provides a computer program product, which, when executed, is used to implement a simulation evaluation method for the wear state of sealing strips as described in the above embodiments.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0066] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or more of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0067] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0068] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A simulation evaluation method for the wear state of sealing strips, characterized in that, Includes the following steps: Obtain the geometric data of the sealing strip cross section and the corresponding sheet metal cross section, and establish the corresponding finite element analysis model based on the geometric data, wherein the sealing strip is set as a deformable body and the corresponding sheet metal cross section is set as a rigid body; The finite element analysis model is subjected to preload analysis to generate corresponding preload analysis results, and the finite element analysis model is adjusted according to the preload analysis results; Based on the adjusted finite element analysis model, a velocity load is applied to the rigid body of the sheet metal section to generate corresponding dynamic transient analysis results, and the wear state of the sealing strip is evaluated based on the dynamic transient analysis results.

2. The simulation evaluation method for the wear state of the sealing strip according to claim 1, characterized in that, The step of performing preload analysis on the finite element analysis model to generate corresponding preload analysis results includes: Obtain the preset compression amount between the sealing strip and the sheet metal; The preset compression amount is decomposed into a first displacement component in the horizontal direction and a second displacement component in the vertical direction. Based on the first displacement component and the second displacement component, the corresponding displacement is applied to the sheet metal in the finite element analysis model until the deformed body of the sealing strip reaches the preset compression amount, and the corresponding pre-compression analysis result is generated.

3. The simulation evaluation method for the wear state of the sealing strip according to claim 1, characterized in that, The adjustment of the finite element analysis model based on the preload analysis results includes: Identify the compression deformation results of the sealing strip in the pre-compression analysis results; Calculate the first difference between the pressure deformation result of the sealing strip and the true value of the actual deformation of the sealing strip in the pre-compression analysis results; The finite element analysis model is adjusted based on the first difference.

4. The simulation evaluation method for the wear state of the sealing strip according to claim 1, characterized in that, The process of applying a velocity load to the rigid body of the sheet metal section to generate corresponding dynamic transient analysis results includes: Obtain the motion parameters, contact relationships, and velocity-load boundary conditions of the sheet metal relative to the sealing strip under actual working conditions; The finite element analysis model is activated based on the motion parameters, the contact relationship, and the velocity load boundary conditions. A velocity load is applied to the rigid body of the sheet metal section to generate a target curve for the measurement point on the sealing strip. The corresponding dynamic transient analysis results are generated based on the target curve, where the target curve is a displacement and time curve.

5. The simulation evaluation method for the wear state of the sealing strip according to claim 1, characterized in that, The evaluation of the wear condition of the sealing strip based on the dynamic transient analysis results includes: The minimum tangential wear displacement of the sealing strip is calculated based on the results of the dynamic transient analysis. Calculate the second difference between the minimum tangential wear displacement and the sheet metal misalignment at the corresponding position; The structure or coating of the sealing strip is optimized based on the second difference.

6. The simulation evaluation method for the wear state of the sealing strip according to claim 1, characterized in that, The process of obtaining the geometric data of the sealing strip cross-section and the corresponding sheet metal cross-section includes: Multiple analysis locations were determined at target intervals along the assembly trajectory of the sealing strip on the vehicle door frame; Based on each analysis location, a cutting plane perpendicular to the central axis of the sealing strip is selected. At each analysis location, the geometric data of the sealing strip cross-section and the corresponding sheet metal cross-section are identified.

7. A simulation evaluation system for the wear state of sealing strips, characterized in that, A simulation evaluation method for realizing the wear state of sealing strips as described in any one of claims 1 to 6, wherein the system comprises: The model building module is used to acquire the geometric data of the sealing strip cross section and the corresponding sheet metal cross section, and to build the corresponding finite element analysis model based on the geometric data. The sealing strip is set as a deformable body, and the corresponding sheet metal cross section is set as a rigid body. The preload analysis module is used to perform preload analysis on the finite element analysis model, generate corresponding preload analysis results, and adjust the finite element analysis model according to the preload analysis results. The wear analysis module applies velocity loads to the rigid body of the sheet metal section based on the adjusted finite element analysis model to generate corresponding dynamic transient analysis results, and evaluates the wear state of the sealing strip based on the dynamic transient analysis results.

8. An electronic device, characterized in that, include: The memory, the processor, and the computer program stored in the memory and executable on the processor, the processor executing the program to implement the simulation evaluation method for the wear state of the sealing strip as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the simulation evaluation method for the wear condition of the sealing strip as described in any one of claims 1-6.

10. A computer program product, characterized in that, When the computer program is executed, it is used to implement the simulation evaluation method for the wear state of the sealing strip as described in any one of claims 1-6.

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