Clutch driven disc shear strength simulation method, system, equipment and medium

Abstract

The invention provides a clutch driven disc shear strength simulation method, system, equipment and medium, and belongs to the technical field of clutches. A driven disc finite element model based on an upper friction plate, a middle disc and a lower friction plate is established; defining material characteristic parameters, constraint set points and corresponding degrees of freedom; setting a connection relation among the upper friction plate, the middle disc and the lower friction plate based on a rivet riveting mode; simulating a joint sliding friction process of the clutch, and applying a preset load and a fixed constraint along the axial direction of the rivet based on the middle surface of the rivet; and calculating stress distribution of the friction plate and the driven disc in a joint sliding friction state to form joint simulation result information. According to the method, the scale minimum value and the scale maximum value of the stress distribution nephogram are set as the material yield strength, and the position exceeding the preset yield strength is marked, so that the stress dangerous position can be positioned.

Description

Technical Field

[0001] The present invention belongs to the technical field of clutches, and in particular relates to a clutch driven disc shear strength simulation method, system, equipment and medium. Background Art

[0002] The engine torque is transmitted to the driven plate through the flywheel and pressure plate of the clutch, and then to the transmission input shaft. The driven plate plays a key role in power transmission and attenuation of engine torque fluctuations.

[0003] At present, when designing a clutch, it is necessary to define the shear strength of the driven disc. The shear strength of the driven disc is an indicator to measure the ability of the clutch driven disc to resist damage when subjected to shear force. Generally, simulation is required for analysis. During the simulation process, it is necessary to know the shear strength of the driven disc, and it is necessary to consider the thickness and shape of the intermediate disc, as well as the connection method between the friction plate and the intermediate disc. Rivet connection is usually used, which requires considering the number, diameter and distribution of rivets to ensure the reliability of the connection and the effective transmission of shear force. It can be seen that multiple factors need to be considered when performing simulation.

[0004] The existing technology is not accurate enough or not comprehensive enough in terms of load application during simulation, resulting in errors in the simulation results. Improper constraint settings or inaccurate load application can easily lead to poor simulation results. Moreover, it does not focus on extracting key data at stress risk locations, which affects the accurate evaluation of the driven disk performance. Summary of the invention

[0005] The present invention provides a clutch driven disc shear strength simulation method, which can simulate the stress state under actual working conditions, thereby improving the accuracy of simulation results.

[0006] Methods include: Establish a finite element model of the driven disc based on the upper friction plate, the middle disc and the lower friction plate; Define material characteristic parameters, constraint set points and corresponding degrees of freedom; Setting a connection relationship between the upper friction plate, the middle plate and the lower friction plate based on a rivet riveting method; The engagement and sliding friction process of the clutch is simulated, and a preset load and fixed constraint are applied along the axial direction of the rivet based on the mid-surface of the rivet; The stress distribution of the friction plate and the driven plate in the engagement sliding state is calculated to form the engagement simulation result information.

[0007] It should be further explained that the method also includes: when simulating clutch separation, based on the rotational force state of the driven disc, the stress distribution of the friction plate and the driven disc under the action of the rotating centrifugal force is calculated to form separation simulation result information.

[0008] Further, it should be noted that the joint simulation result information is configured into the stress distribution nephogram of the pressure plate; Set the minimum value of the scale and the material yield strength of the maximum value of the scale of the stress distribution nephogram, identify the positions where the stress exceeds the preset yield strength, the identified area is the stress dangerous position, and extract the maximum value of the stress calculation result at the stress dangerous position of the friction plate under the action of rotational centrifugal force.

[0009] Further, it should be noted that before establishing the finite element model of the driven plate, it also includes: establishing the finite element model of the clutch assembly based on the pressure plate, driven plate, and flywheel of the clutch; Set the constraint set points P1 on the outer side of the flywheel, constraint set point P2 on the inner side of the flywheel, constraint set point P3 of the intermediate plate, constraint set point P4 of the pressure plate, and constraint set point P5 of the pressure plate pressing force in the finite element model of the clutch assembly; The defined constraint set points in the finite element model of the driven plate assembly include: the upper friction plate surface constraint set point D1, the lower friction plate surface constraint set point D2, and the intermediate plate constraint set point D3.

[0010] Further, it should be noted that in the method, the binding constraint between the rivet head and the surface of the fixed part and the contact constraint between the circumferential surface of the middle part of the rivet and the circumferential surface of the rivet hole of the fixed part are respectively established; the middle plane of the rivet is established at the middle part of each rivet.

[0011] Further, it should be noted that in the method, the constraint axial displacement is set for the upper friction plate surface constraint set point D1, and the circumferential rotation degree of freedom is configured; Set the constraint axial displacement for the lower friction plate surface constraint set point D2, and configure the circumferential rotation degree of freedom; Set the middle disk center node for the intermediate plate constraint set point D3, and configure the full constraint; Extract the rivet axial middle plane node set, define the Z axis in the coordinate system as along the axial direction of the rivet, and apply the preset load Zc as: ; Ft is the time-varying axial pressure, Sz is the friction plate contact area, and N is the total number of rivets.

[0012] Further, it should be noted that the steps for calculating the stress distribution of the friction plate and the driven plate in the engagement and sliding friction state also include: Establish the friction contact surfaces between the upper friction plate and the intermediate plate, and between the lower friction plate and the intermediate plate. The intermediate plate is defined as the rigid main surface, and the friction plate is the deformed slave surface; Calculate the contact stress based on the following method: ; where, fx is the stiffness of the normal friction contact surface, and h is the contact gap; Calculate the frictional stress Fmc of the frictional contact surface between the upper friction plate and the intermediate plate and the frictional contact surface between the lower friction plate and the intermediate plate based on the following formula;

[0013] Among them, Td is the frictional contact surface parameter, and Mf is the direction of the frictional force; Mf = 1 means that the friction plate slides to the right relative to the intermediate plate, Mf = 0 means the stationary state, and Mf = -1 means that the friction plate slides to the left relative to the intermediate plate;

[0014] Md is the static coefficient of the frictional contact surface, Md takes 0.3 to 0.35; Mj is the dynamic coefficient of the frictional contact surface, Mj takes 0.25 to 0.3; α represents the state of the frictional contact surface, α = 1 is static friction, the friction plate and the intermediate plate are stationary, and α = 0 is dynamic friction, the friction plate and the intermediate plate are sliding.

[0015] This application also provides a clutch driven plate shear strength simulation system, which includes: A model configuration module for establishing a finite element model of the driven plate based on the upper friction plate, the intermediate plate, and the lower friction plate; A parameter definition module for defining material property parameters, constraint set points, and corresponding degrees of freedom; A relationship setting module for setting the connection relationship between the upper friction plate, the intermediate plate, and the lower friction plate based on the rivet method; A simulation calculation module for simulating the engagement and sliding friction process of the clutch, and applying a preset load and fixed constraint along the axial direction of the rivet mid-plane; Calculate the stress distribution of the friction plate and the driven plate in the engagement and sliding friction state, and form the engagement simulation result information.

[0016] According to another embodiment of the present application, there is provided an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of the clutch driven plate shear strength simulation method are implemented.

[0017] According to still another embodiment of the present application, there is also provided a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the clutch driven plate shear strength simulation method are implemented.

[0018] It can be seen from the above technical solutions that the present invention has the following advantages: The clutch driven plate shear strength simulation method provided by this application maps the engagement simulation results to the stress distribution contour map of the pressure plate, sets the scale range based on the material yield strength, marks the dangerous positions exceeding the yield strength, and enables users to lock in the high stress concentration areas. By extracting the maximum stress value at the stress dangerous positions, a quantitative basis is provided for strength verification. By comparing the simulation results of the engagement sliding friction stress and the separation centrifugal stress, the performance differences of the clutch under different working conditions can be evaluated, such as identifying the superposition effect of the contact stress of the friction plate during engagement and the stress induced by the centrifugal force during separation. In the separation working condition, based on the centrifugal force simulation in the free rotation state, the radial deformation trend of the friction plate when the driven plate rotates at high speed can be reflected, avoiding the problem of underestimated stress caused by ignoring the dynamic centrifugal force in traditional static analysis. Based on the marked stress dangerous positions and the maximum value data, the rivet layout can be optimized, the thickness of the friction plate can be adjusted, or high yield strength materials can be replaced accordingly.

[0019] In the separation working condition of this application, the rotation constraint of the intermediate plate is released to allow free rotation, truly simulating the dynamic boundary conditions during high-speed separation. By defining the stiffness and clearance of the friction contact surface and combining the differential settings of the static / dynamic friction coefficients, the transient sliding behavior between the friction plate and the intermediate plate can be accurately captured. Combining the dynamic load and the centrifugal force field to simulate the cyclic load effect in actual use improves the accuracy of fatigue prediction. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic diagram of the three-dimensional model of the pressure plate; Figure 2 It is a schematic diagram of the three-dimensional model of the driven plate; Figure 3 It is a schematic diagram of the three-dimensional model of the flywheel; Figure 4 It is a schematic diagram of the three-dimensional model of the upper friction plate; Figure 5 It is a schematic diagram of the three-dimensional model of the wave washer; Figure 6 It is a schematic diagram of the three-dimensional model of the large steel sheet; Figure 7 It is a schematic diagram of the three-dimensional model of the rivet; Figure 8 It is a schematic diagram of the lower friction plate; Figure 9 It is a schematic diagram of the set points of the outer constraints of the flywheel; Figure 10Schematic diagram of the intermediate disk constraint set point Figure 11 Schematic diagram of the pressure plate clamping force constraint set point Figure 12 Schematic diagram of the upper friction plate surface constraint set point Figure 13 Schematic diagram of the lower friction plate surface constraint set point Figure 14 Schematic diagram of the intermediate disk constraint set point in the driven disk finite element model Figure 15 Schematic diagram of the mid-plane of the rivet action Figure 16 Flow chart of the clutch driven disk shear strength simulation method Figure 17 Schematic diagram of an electronic device Detailed implementation manners

[0022] As Figures 1 to 3 The following gives an example diagram of the clutch assembly finite element model involved in the present application. Combining with the clutch assembly finite element model, the clutch driven disk shear strength simulation method provided by the present application establishes a driven disk finite element model covering the upper friction plate, the intermediate disk and the lower friction plate. Define material properties, constraint set points and degrees of freedom. Set the rivet connection methods for the upper, middle and lower parts. Simulate the clutch engagement sliding friction process, apply loads and fixed constraints, and calculate the stress distribution. And simulate the rotational stress state when the clutch is disengaged, and calculate the centrifugal stress distribution. It can predict the shear strength of the clutch driven disk at the design stage, avoid repeated work in actual manufacturing and testing, and improve the design efficiency. The simulation results can provide detailed stress distribution information to help engineers identify potential structural weaknesses, thereby optimizing the design of the driven disk and improving its reliability and durability.

[0023] The following will describe in detail the specific implementation manners of the clutch driven disk shear strength simulation method. For the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are proposed to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details.

[0024] It should be understood that when used in the specification of the present application, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0025] Statements such as "an embodiment" or "some embodiments" described in this application mean that the specific features, structures, or characteristics described in the embodiment are included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this application do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0026] As Figures 1 to 3 shown, before analyzing the shear strength of the clutch driven plate in this embodiment, first obtain the three-dimensional models of the clutch pressure plate 1, driven plate 2, and flywheel 3, and establish a finite element model of the clutch assembly. As shown in the appendix Figures 4 to 8 shown, based on the three-dimensional model of the clutch driven plate 2, establish a finite element model of the driven plate. The finite element model of the driven plate includes an upper friction plate 5, a wave washer 6, a large steel plate 7, and a lower friction plate 9. Among them, an intermediate plate 4 is provided on the upper friction plate 5. The finite element model of the driven plate is assembled by rivets 8.

[0027] As Figures 9 to 11 shown, the finite element model of the clutch assembly includes a flywheel outer constraint set point P1, a flywheel inner constraint set point P2, an intermediate plate constraint set point P3, a pressure plate constraint set point P4, and a pressure plate clamping force constraint set point P5. This embodiment also sets the degrees of freedom of the flywheel outer constraint set point P1, the flywheel inner constraint set point P2, the intermediate plate constraint set point P3, the pressure plate constraint set point P4, and the pressure plate clamping force constraint set point P5.

[0028] Among them, the constraint set points P1 and P2 have all six degrees of freedom. The constraint set points P3 and P4 have the other five degrees of freedom except for axial translation, and a fixed constraint is applied to the mid-plane of all rivets. Degree of freedom one, degree of freedom two, and degree of freedom three respectively represent the translational degrees of freedom of the set point along the x, y, and z axes, and degree of freedom four, degree of freedom five, and degree of freedom six respectively represent the rotational degrees of freedom of the set point around the x, y, and z axes.

[0029] In this embodiment, an upper friction plate surface constraint set point D1, a lower friction plate surface constraint set point D2, and an intermediate plate constraint set point D3 are defined in the finite element model of the driven plate, as shown in the appendix Figures 12 to 14 shown. Figure 15 The schematic diagram of the action mid-plane of the rivet 10 is shown. Among them, the constraint set points D1, D2, and D3 have all degrees of freedom, and a fixed constraint is applied to the mid-plane of all rivets.

[0030] Combined with the actual simulation requirements, in the established finite element model of the clutch assembly, contact constraints are established between the pressure plate and the friction plate, and between the flywheel and the friction plate; contact constraints are also established based on the contact surfaces of the friction plate, wave washer, and large steel plate.

[0031] Combined with the above embodiments, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0032] As Figure 16 shown, the clutch driven plate shear strength simulation method provided in this embodiment includes the following steps: S101: Establish a finite element model of the driven plate based on the upper friction plate, intermediate plate, and lower friction plate.

[0033] In this embodiment, based on the actual geometric dimensions of the upper friction plate, intermediate plate, and lower friction plate, a geometric model of the upper friction plate, intermediate plate, and lower friction plate is constructed using 3D modeling software and imported into the finite element analysis software. By dividing the mesh, the mesh density of the rivet action mid-plane and the friction plate contact surface is ensured to accurately capture the stress concentration phenomenon.

[0034] S102: Define material property parameters, constraint set points, and corresponding degrees of freedom.

[0035] In this embodiment, the material property parameters of the upper friction plate, intermediate plate, and lower friction plate can be defined according to the actual properties of the driven plate material, specifically, the elastic modulus, density, Poisson's ratio, etc. can be set. According to Figures 12 to 15 shown, constraint set points are set at the position of constraint set point D1 on the surface of the upper friction plate, the position of constraint set point D2 on the surface of the lower friction plate, and the position of constraint set point D3 on the intermediate plate, and the degrees of freedom are defined. By setting the constraint set points, the specific movement of the model during the simulation can be restricted or allowed.

[0036] As a way of this embodiment, according to parameters such as the elastic modulus, Poisson's ratio, density, and yield strength of the driven plate. The constraint set point D1 on the surface of the upper friction plate can be set as a constraint for the displacement in the Z direction to simulate the fixed contact with the clutch pressure plate. The constraint set point D2 on the surface of the lower friction plate is set as a constraint for the radial displacement in the X direction or Y direction to limit the centrifugal expansion. The constraint set point D3 on the intermediate plate is set as a circumferential rotational degree of freedom to simulate the fixed connection with the clutch hub.

[0037] In this embodiment, constraint conditions are set to ensure that the boundary conditions of the driven disk finite element model under free rotation and stress states are consistent with the actual working conditions. By setting constraint set points and degrees of freedom, the boundary conditions and stress states of the driven disk under actual working conditions can be realistically simulated, thereby improving the reliability of simulation analysis.

[0038] S103: Set the connection relationships of the upper friction plate, intermediate disk, and lower friction plate based on the rivet method.

[0039] In this embodiment, according to the actual positions and connection methods of the rivets, the connection relationships between the upper friction plate, intermediate disk, and lower friction plate are established. By defining parameters such as contact surfaces and connection forces, the connection effects of the rivets are simulated. At the same time, considering the deformation and failure behaviors of the rivets during the stress process, the accuracy and reliability of the connection relationships are ensured.

[0040] S104: Simulate the engagement and sliding friction process of the clutch, and apply a preset load and fixed constraint along the axial direction of the rivet midplane on the rivets.

[0041] Specifically, in the driven disk finite element model, binding constraints can be established between the heads of each rivet and the surface of the fixed part, contact constraints can be established between the circumferential surfaces of the middle parts of each rivet and the circumferential surfaces of the rivet holes of the fixed part, and a rivet midplane can be established at the middle part of each rivet.

[0042] This embodiment can use the dynamics module in the finite element analysis software to simulate the sliding friction motion during the clutch engagement process. According to the Figure 15 actual stress state of the rivet midplane shown, a preset load is applied along the axial direction of the rivet midplane on the rivets, and corresponding fixed constraints are set. By adjusting the load magnitude and constraint conditions, the stress conditions under different working conditions can be simulated.

[0043] S105: Calculate the stress distributions of the friction plate and the driven disk in the engagement and sliding friction state, and form engagement simulation result information.

[0044] S106: When simulating the separation of the clutch, based on the rotational stress state of the driven disk, calculate the stress distributions of the friction plate and the driven disk under the action of rotational centrifugal force, and form separation simulation result information.

[0045] In this embodiment, by simulating the clutch separation process and calculating the stress distribution, the performance of the driven disk can be evaluated. Considering the high-speed rotation working condition, the driven disk needs to bear a large rotational centrifugal force. By calculating and analyzing the stress distribution, the stress conditions and deformation behaviors of the driven disk under the action of rotational centrifugal force can be understood, assisting users in understanding the performance of the driven disk, thereby improving the design optimization goal and increasing the service life and reliability of the driven disk.

[0046] Based on the above embodiments, in order to further improve the reliability of the clutch driven disc shear strength simulation method provided by the above embodiments, the following is a more specific implementable manner given in combination with the clutch driven disc shear strength simulation method of the above embodiments. In this embodiment, based on the established finite element model of the clutch assembly, a three-dimensional grid model can be imported, constraint set points P1 to P5 can be established, contact surfaces can be selected, contact and binding constraints can be established, material property parameters can be input, constraints and loads can be set. During the execution of the clutch engagement and slip process, the simulation of the driven disc shear strength includes the following steps: Step S201: Apply a specified displacement along the axial direction of the rivets at the mid-plane of all the rivets. Optionally, the displacement can be from 0.01 mm to 0.02 mm to establish pre-contact between the contact surfaces of each part.

[0047] Step S202: Apply a specified pre-tightening force along the axial direction of the mid-plane of all the rivets.

[0048] Step S203: Apply a specified pre-pressing force along the axial direction of the pressure plate pressing force constraint set point P5. Optionally, it is set to 100 N to establish pre-contact between the pressure plate and the friction plate, and between the friction plate and the flywheel.

[0049] Step S204: Apply a specified diaphragm spring pressing force along the axial direction of the pressure plate pressing force constraint set point P5.

[0050] Step S205: Apply a specified engine torque along the axial rotation direction of the intermediate plate constraint set point P3. Apply a specified angular velocity of rotation along the axial direction to all the units, that is, the centrifugal force at the maximum engine speed. The load magnitudes applied in this embodiment are different for dry diaphragm spring clutches adapted to different engine torque magnitudes and need to be determined according to the specific clutch model.

[0051] As an implementation manner of this embodiment, set the constraint axial displacement for the upper friction plate surface constraint set point D1 and configure the circumferential rotation degree of freedom. Set the constraint axial displacement for the lower friction plate surface constraint set point D2 and configure the circumferential rotation degree of freedom. Set the intermediate plate center node for the intermediate plate constraint set point D3 and configure full constraints.

[0052] Extract the rivet axial mid-plane node set, define the Z-axis in the coordinate system as along the rivet axis, and apply a preset load Zc of: ; Ft is the time-varying axial pressure, Sz is the friction plate contact area, and N is the total number of rivets.

[0053] In this embodiment, axial displacements of the upper friction plate surface constraint set point D1 and the lower friction plate surface constraint set point D2 are simultaneously constrained, and circumferential rotational degrees of freedom are configured. This not only restricts the axial separation tendency of the friction plate due to centrifugal force but also allows it to rotate naturally during the clutch engagement and separation processes, making it more in line with the dynamic contact between the friction plate and the pressure plate in actual working conditions. Based on the calculation model for applying a preset load Zc, uniform distribution and quantification of the load are achieved, avoiding the random errors of traditional empirical load application. The axial mid-plane node set of the rivets is extracted, and loads are applied along the axial direction of the rivets to directly simulate the stress characteristics of the rivets under axial pressure, ensuring that the load transfer path is consistent with the actual assembly state. Combining with the time-varying axial pressure Ft, the dynamic process of gradually increasing pressure during the clutch engagement process can be simulated, improving the accuracy of transient analysis. Combining the analysis results of the engagement sliding friction stress in S105 and the separation centrifugal stress in S106, the fatigue damage and life attenuation trend of the clutch driven disc during long-term use can be predicted.

[0054] In this embodiment, the step of calculating the stress distribution of the friction plate and the driven disc in the engagement sliding friction state further includes: Frictional contact surfaces between the upper friction plate and the intermediate disc, and between the lower friction plate and the intermediate disc are established. The intermediate disc is defined as the rigid master surface, and the friction plate is the deformable slave surface.

[0055] The contact stress is calculated based on the following method: .

[0056] Where, fx is the stiffness of the normal frictional contact surface, and h is the contact gap.

[0057] The frictional stress Fmc of the frictional contact surface between the upper friction plate and the intermediate disc, and the frictional contact surface between the lower friction plate and the intermediate disc is calculated based on the following formula;

[0058] Where, Td is the frictional contact surface parameter, and Mf is the direction of the frictional force; Mf = 1 means the friction plate slides to the right relative to the intermediate disc, Mf = 0 means the static state, and Mf = -1 means the friction plate slides to the left relative to the intermediate disc.

[0059]

[0060] Md is the static coefficient of the frictional contact surface, Md takes values from 0.3 to 0.35; Mj is the dynamic coefficient of the frictional contact surface, Mj takes values from 0.25 to 0.3; α represents the state of the frictional contact surface, α = 1 is static friction, the friction plate and the intermediate disc are stationary, and α = 0 is dynamic friction, the friction plate and the intermediate disc are sliding.

[0061] In this embodiment, by introducing the friction contact surface state parameter, where α = 1 represents static friction and α = 0 represents dynamic friction, it is possible to accurately simulate the instantaneous state switching between the friction plate and the intermediate plate during the clutch engagement and slip process. The differential setting of the static friction coefficient Md = 0.3 to 0.35 and the dynamic friction coefficient Mj = 0.25 to 0.3, combined with the physical properties of the actual material in the static / dynamic friction state, avoids the simplified error of a single friction coefficient in the traditional method. The slip direction of the friction plate relative to the intermediate plate is characterized by the parameter Mf to achieve the dynamic response of the friction force vector and enhance the adaptability of the model to complex motion conditions. Through the refined modeling of the contact stiffness and clearance, the stress gradient in key areas such as the edge of the rivet hole and the contact surface of the friction plate can be captured, providing a targeted basis for strength optimization. Through the coupling of the friction contact model and the centrifugal force field, the axial pressing force, slip friction force during clutch engagement, and rotational centrifugal force during separation can be simultaneously simulated, comprehensively covering the action of multiple physical fields.

[0062] Step S206: Calculate the stress distribution of the friction plate and the driven disk in the engagement and slip state to form the engagement simulation result information.

[0063] Step S207: When simulating the clutch separation, based on the rotational force state of the driven disk, calculate the stress distribution of the friction plate and the driven disk under the action of the rotational centrifugal force to form the separation simulation result information.

[0064] Step S208: Configure the engagement simulation result information and the separation simulation result information into the stress distribution cloud map, adjust the minimum value of the scale of the stress distribution cloud map to 0 MPa, and the maximum value of the scale to the yield strength of the material. The positions where the stress exceeds the yield strength will be displayed in gray, and the gray area is the dangerous position. Extract the maximum value of the stress calculation result at the dangerous position of the friction plate or the large steel sheet under the engagement and slip working conditions.

[0065] The above method can configure the engagement simulation result information into the stress distribution cloud map of the pressure plate, and can visually display the stress condition of the driven disk in the engagement and slip state, facilitating users to understand the overall stress distribution and improving work efficiency. By setting the minimum value of the scale of the stress distribution cloud map and the maximum value of the scale to the yield strength of the material and marking the positions exceeding the preset yield strength, the stress dangerous positions can be located.

[0066] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0067] The following are embodiments of the clutch driven plate shear strength simulation system provided by the present disclosure. This system and the clutch driven plate shear strength simulation methods of the above embodiments belong to the same inventive concept. For the details not described in detail in the embodiments of the clutch driven plate shear strength simulation system, reference may be made to the embodiments of the above clutch driven plate shear strength simulation methods.

[0068] The system includes: a model configuration module for establishing a finite element model of the driven plate based on the upper friction plate, the intermediate plate, and the lower friction plate.

[0069] A parameter definition module for defining material property parameters, constraint set points, and corresponding degrees of freedom.

[0070] A relationship setting module for setting the connection relationships of the upper friction plate, the intermediate plate, and the lower friction plate based on the rivet method.

[0071] A simulation calculation module for simulating the engagement and slip friction process of the clutch, and applying a preset load and fixed constraints along the axial direction of the rivet mid-plane in the rivet.

[0072] Calculate the stress distribution of the friction plate and the driven plate in the engagement and slip friction state to form engagement simulation result information.

[0073] As Figure 17 shown, the present application also provides an electronic device, including a display module 103, a memory 102, a processor 101, and a computer program stored on the memory and executable on the processor 101. When the processor 101 executes the program, the steps of the clutch driven plate shear strength simulation method are implemented.

[0074] In the embodiments of the present invention, the electronic device includes, but is not limited to, a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as, a personal digital processor, a cellular phone, a smart phone, a wearable device, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of the present application described herein and / or claimed.

[0075] In the embodiments of the present application, the processor 101 can be implemented by using at least one of an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), a processor, a controller, a microcontroller, a microprocessor, and an electronic unit designed to execute the functions described herein. In some cases, such an implementation can be implemented in the controller. For software implementation, an implementation of a process or function can be implemented with a separate software module that allows execution of at least one function or operation. The software code can be implemented by a software application (or program) written in any suitable programming language. The software code can be stored in the memory and executed by the controller.

[0076] The display module 103 is used to display information input by the user or information provided to the user. The display module 103 may include a display panel, and the display panel can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.

[0077] The memory 102 can be used to store software programs and various data. The memory 102 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0078] The present application also provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the clutch driven disk shear strength simulation method are implemented.

[0079] The storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0080] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. 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 the present invention. Thus, the present invention is not intended 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 simulation method for the shear strength of a clutch driven plate, characterized in that the method Including: Establish a finite element model of the driven plate based on the upper friction plate, the intermediate plate, and the lower friction plate; Define material property parameters, constraint set points, and corresponding degrees of freedom; Set the connection relationships of the upper friction plate, the intermediate plate, and the lower friction plate based on the rivet method; Simulate the engagement and sliding friction process of the clutch, and apply a preset load and fixed constraints along the axial direction of the rivet on the middle plane of the rivet; Calculate the stress distribution of the friction plate and the driven plate in the engagement and sliding friction state, and form the engagement simulation result information.

2. The method for simulating the shear strength of the clutch driven plate according to claim 1, characterized in that The method further includes: when simulating the separation of the clutch, based on the rotational force state of the driven plate, and calculating the stress distribution of the friction plate and the driven plate under the action of rotational centrifugal force, and forming the separation simulation result information.

3. The method for simulating the shear strength of the clutch driven plate according to claim 1, characterized in that Configure the engagement simulation result information into the stress distribution nephogram of the pressure plate; Set the minimum value of the scale and the material yield strength of the maximum value of the scale of the stress distribution nephogram, mark the positions where the stress exceeds the preset yield strength, the marked area is the stress dangerous position, and extract the maximum value of the stress calculation result at the stress dangerous position of the friction plate under the action of rotational centrifugal force.

4. The method for simulating the shear strength of the clutch driven plate according to claim 1, characterized in that Before the step of establishing the finite element model of the driven plate, it further includes: establishing a finite element model of the clutch assembly based on the pressure plate, the driven plate, and the flywheel of the clutch; Set the constraint set points P1 on the outer side of the flywheel, the constraint set point P2 on the inner side of the flywheel, the intermediate plate constraint set point P3, the pressure plate constraint set point P4, and the pressure plate pressing force constraint set point P5 in the finite element model of the clutch assembly; The constraint set points defined in the finite element model of the driven plate assembly include: the upper friction plate surface constraint set point D1, the lower friction plate surface constraint set point D2, and the intermediate plate constraint set point D3.

5. The method for simulating the shear strength of the clutch driven plate according to claim 4, characterized in that In the method, establish a binding constraint between the head of the rivet and the surface of the fixed part and a contact constraint between the circumferential surface of the middle part of the rivet and the circumferential surface of the rivet hole of the fixed part; establish a middle plane of the rivet at the middle part of each rivet.

6. The method for simulating the shear strength of the clutch driven plate according to claim 4, characterized in that In the method, set the constrained axial displacement for the upper friction plate surface constraint set point D1 and configure the circumferential rotational degree of freedom; Set the constrained axial displacement for the lower friction plate surface constraint set point D2 and configure the circumferential rotational degree of freedom; Set the middle node of the intermediate plate for the intermediate plate constraint set point D3 and configure full constraints; Extract the rivet axial mid-plane node set, define the Z-axis in the coordinate system as along the rivet axis, and apply a load Zc of a preset magnitude as follows: ; Ft is the time-varying axial pressure, Sz is the friction plate contact area, and N is the total number of rivets.

7. The method for simulating the shear strength of the clutch driven plate according to claim 4, characterized in that The step of calculating the stress distribution of the friction plate and the driven plate in the engagement and sliding friction state further includes: Establish the friction contact surfaces between the upper friction plate and the intermediate plate, and between the lower friction plate and the intermediate plate. The intermediate plate is defined as the rigid master surface, and the friction plate is the deformable slave surface; The contact stress is calculated based on the following method as: ; Among them, $f_x$ is the stiffness of the normal friction contact surface, and $h$ is the contact clearance; Calculate the friction stress $F_{mc}$ of the friction contact surface between the upper friction plate and the intermediate plate and the friction contact surface between the lower friction plate and the intermediate plate based on the following formula; Among them, $T_d$ is the friction contact surface parameter, and $M_f$ is the direction of the frictional force; $M_f = 1$ means that the friction plate slides to the right relative to the intermediate plate, $M_f = 0$ means the static state, and $M_f = -1$ means that the friction plate slides to the left relative to the intermediate plate; $M_d$ is the static coefficient of the friction contact surface, and $M_d$ takes a value of 0.3 to 0.35; $M_j$ is the dynamic coefficient of the friction contact surface, and $M_j$ takes a value of 0.25 to 0.3; $\alpha$ represents the state of the friction contact surface, $\alpha = 1$ is static friction, the friction plate and the intermediate plate are stationary, and $\alpha = 0$ is dynamic friction, the friction plate and the intermediate plate are sliding.

8. A shear strength simulation system for a clutch driven plate, characterized in that, The system is used to implement the clutch driven plate shear strength simulation method described in any one of claims 1 to 7; The system includes: A model configuration module for establishing a finite element model of the driven plate based on the upper friction plate, the intermediate plate, and the lower friction plate; A parameter definition module for defining material property parameters, constraint set points, and corresponding degrees of freedom; A relationship setting module for setting the connection relationship between the upper friction plate, the intermediate plate, and the lower friction plate based on the rivet method; A simulation calculation module for simulating the engagement and sliding friction process of the clutch, and applying a preset load and fixed constraints along the axial direction of the rivet mid-plane; Calculate the stress distribution of the friction plate and the driven plate in the engagement and sliding friction state, and form engagement simulation result information.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the clutch driven plate shear strength simulation method described in any one of claims 1 to 7.

10. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the clutch driven plate shear strength simulation method described in any one of claims 1 to 7.

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