Wheel stress simulation method, device and equipment

Abstract

The invention relates to a wheel stress simulation method, device and equipment, and relates to the technical field of electric digital data processing, and the method comprises the steps: carrying out the modeling of a wheel assembly simulation model, and obtaining a suspension stress simulation model; wherein the wheel assembly simulation model is used for representing a wheel with a tire and a wheel hub, the wheel hub and the tire have applied an assembly pretightening force, and the tire has been inflated; the rigid road surface obstacle is controlled to move towards the wheel in the suspension stress simulation model at a specified speed in the simulation environment, so that stress simulation of the suspension stress simulation model under the obstacle crossing working condition is achieved, and the mechanical response of the inner rim of the wheel is obtained. Therefore, accurate prediction of the stress of the wheel is realized.

Description

Technical Field

[0001] The present application relates to the technical field of electronic digital data processing, in particular to the technical field of simulation, and specifically to a method, device and equipment for simulating wheel force. Background Art

[0002] As the core load-bearing component of a vehicle's travel system, the wheel's structural strength is directly related to the vehicle's safety and reliability. Under complex road conditions, wheels must withstand the combined effects of road impact, dynamic loads, and alternating stresses. The inner rim, the critical junction between the wheel and tire, is crucial to its overall performance, making research on its structural strength crucial.

[0003] However, the current design specifications and verification standards for wheel assemblies are still mainly based on the experience of fuel vehicles, resulting in frequent unexpected failures such as cracking and failure of the inner wheel rim during actual road tests. Therefore, it is necessary to explore a high-precision simulation method to achieve accurate prediction of wheel forces. Summary of the Invention

[0004] This application provides a wheel force simulation method, device, and apparatus to at least solve the technical problem of the inability to accurately predict wheel forces in related technologies. The technical solution of this application is as follows:

[0005] According to the first aspect provided by the present application, a wheel force simulation method is provided, comprising: obtaining a suspension force simulation model by modeling a wheel assembly simulation model; wherein the wheel assembly simulation model is used to represent a wheel with a tire and a wheel hub, and the wheel hub and the tire have been applied with an assembly preload, and the tire has been inflated; by controlling a rigid road obstacle to move toward the wheel in the suspension force simulation model at a specified speed in a simulation environment, so as to realize force simulation of the suspension force simulation model under obstacle crossing conditions, and obtain the mechanical response of the inner rim of the wheel.

[0006] According to the above technical means, the present application can preset the assembly preload and the initial state of the inflated tire in the simulation model, combine the active movement of the obstacle to replace the wheel rotation, and directly simulate the contact mechanics process during actual obstacle crossing, avoiding the problem in related technologies that the explicit simulation during wheel rotation needs to slowly accelerate to avoid wheel disintegration, resulting in excessively high simulation time costs, and the implicit analysis cannot converge due to large deformation under collision conditions. In addition, by fixing the wheel position and controlling the obstacle movement, the transient response of the vehicle crossing the obstacle at a constant speed can be directly simulated, thereby improving simulation efficiency.

[0007] In one possible way, the method further includes: performing an implicit analysis on the mechanical response to obtain the stable strain result of the inner edge of the wheel; updating the suspension force simulation model according to the stable strain result; re - executing the force simulation of the suspension force simulation model under the obstacle - crossing condition, and updating the suspension force simulation model according to the newly obtained stable strain result of the inner edge of the wheel until the number of executions reaches a preset number, so as to obtain the cumulative mechanical response of the inner edge of the wheel.

[0008] According to the above technical means, the present application can iteratively simulate crossing obstacles multiple times, accurately evaluate the cumulative inner - edge strain and the plastic zone expansion, provide a reliable basis for fatigue life prediction. In addition, through implicit analysis, the high - frequency fluctuations in the obstacle - crossing impact can be filtered, the steady - state mechanical response of the material can be obtained, and the transient peak values can be avoided from masking the real damage.

[0009] In one possible way, the mechanical response includes the strain value or the deformation amount of the inner edge of the wheel.

[0010] In one possible way, before controlling the rigid - body road obstacle to move towards the wheel in the suspension force simulation model at a specified speed in the simulation environment, the method further includes: setting the first constraint condition for the wheel assembly simulation model.

[0011] In one possible way, the first constraint condition includes a first sub - constraint, a second sub - constraint, and a third sub - constraint; the first sub - constraint is used to characterize the constraint on the friction force between the wheel assembly simulation model and the road surface; the second sub - constraint is used to characterize the constraint on the static force of the wheel assembly simulation model; the third sub - constraint is used to characterize the constraint on the rotational degree of freedom of the wheel assembly simulation model.

[0012] According to the above technical means, the present application can constrain the wheel assembly simulation model through multi - level constraint conditions, making the simulation environment closer to the real scenario, making the simulation process more stable, and the simulation results more accurate.

[0013] In one possible way, by modeling the wheel assembly simulation model to obtain the suspension force simulation model, it includes: assembling the suspension system components to the wheel assembly simulation model to obtain the initial suspension force simulation model; setting the damping and stiffness of each suspension system component in the initial suspension force simulation model to obtain the suspension force simulation model.

[0014] According to the above technical means, the present application can clarify the dynamic load transfer path between the suspension and the wheel by assembling the suspension system components to the wheel assembly simulation model, as well as the damping and stiffness of each suspension system component, reveal the interaction mechanism between components, and avoid the limitations of traditional isolated analysis.

[0015] In a possible way, the wheel assembly simulation model is constructed as follows: obtaining a tire simulation model and a wheel hub simulation model; integrating the tire simulation model and the wheel hub simulation model based on the second constraint condition, where the second constraint condition is the second constraint condition between the tire and the wheel hub in the wheel assembly, to obtain an initial wheel assembly simulation model; inflating the tire in the initial wheel assembly simulation model and applying an assembly pre-tightening force to the wheel hub and the tire to obtain the wheel assembly simulation model.

[0016] According to the above technical means, the present application can construct a wheel assembly simulation model by integrating a tire model and a wheel hub model, avoiding the problems of mechanical transmission distortion and incomplete boundary conditions caused by the simulation analysis methods without a tire or with a simplified tire in the related art. Therefore, the present application can improve the simulation accuracy and reliability of the wheel.

[0017] According to the second aspect provided by the present application, there is provided a wheel force simulation device, including: a construction unit and a processing unit; the construction unit is used to obtain a suspension force simulation model by modeling the wheel assembly simulation model; wherein, the wheel assembly simulation model is used to represent a wheel with a tire and a wheel hub, and an assembly pre-tightening force has been applied to the wheel hub and the tire, and the tire has been inflated; the processing unit is used to control a rigid pavement obstacle to move towards the wheel in the suspension force simulation model at a specified speed in a simulation environment to implement the force simulation of the suspension force simulation model under an obstacle-crossing condition, and obtain the mechanical response of the inner wheel flange of the wheel.

[0018] In a possible way, the processing unit is further used to perform an implicit analysis on the mechanical response to obtain the stable strain result of the inner edge of the wheel;

[0019] In a possible way, the processing unit is further used to update the suspension force simulation model according to the stable strain result;

[0020] In a possible way, the processing unit is further used to re-perform the force simulation of the suspension force simulation model under the obstacle-crossing condition, update the suspension force simulation model according to the re-obtained stable strain result of the inner edge of the wheel until the number of executions reaches a preset number, and obtain the cumulative mechanical response of the inner edge of the wheel.

[0021] In a possible way, the processing unit is further used to set the first constraint condition for the wheel assembly simulation model.

[0022] In a possible way, the construction unit is specifically used to: assemble suspension system components to the wheel assembly simulation model to obtain an initial suspension force simulation model; set the damping and stiffness of each suspension system component in the initial suspension force simulation model to obtain the suspension force simulation model.

[0023] In one possible way, the building unit is further configured to: obtain a tire simulation model and a wheel hub simulation model; integrate the tire simulation model and the wheel hub simulation model based on a second constraint condition, where the second constraint condition is the second constraint condition between the tire and the wheel hub in the wheel assembly, to obtain an initial wheel assembly simulation model; inflate the tire in the initial wheel assembly simulation model, and apply an assembly pre-tightening force to the wheel hub and the tire to obtain a wheel assembly simulation model.

[0024] According to a third aspect provided by the present application, there is provided an electronic device, including: a processor; a memory for storing processor-executable instructions; wherein, the processor is configured to execute the instructions to implement the method according to the first aspect and any possible implementation manner thereof.

[0025] According to a fourth aspect provided by the present application, there is provided a computer-readable storage medium, when the instructions in the computer-readable storage medium are executed by a processor of an electronic device, enabling the electronic device to execute the method according to the first aspect and any possible implementation manner thereof.

[0026] According to a fifth aspect provided by the present application, there is provided a computer program product, the computer program product includes computer instructions, when the computer instructions run on an electronic device, enabling the electronic device to execute the method according to the first aspect and any possible implementation manner thereof.

[0027] It should be noted that the technical effects brought by any implementation manner in the second aspect to the fifth aspect can refer to the technical effects brought by the corresponding implementation manner in the first aspect, which will not be elaborated here.

[0028] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. Description of the Drawings

[0029] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application, and do not constitute an improper limitation to the present application.

[0030] Figure 1 is a schematic diagram of a wheel force simulation system shown according to an exemplary embodiment;

[0031] Figure 2 is a flowchart of a wheel force simulation method shown according to an exemplary embodiment;

[0032] Figure 3 is a schematic diagram of a suspension force simulation model shown according to an exemplary embodiment;

[0033] Figure 4It is a schematic diagram showing the simulation of the downward pressure condition of a suspension force simulation model according to an exemplary embodiment;

[0034] Figure 5 It is a schematic diagram showing the force simulation under an obstacle-crossing condition according to an exemplary embodiment;

[0035] Figure 6 It is a schematic diagram showing the flow of a wheel force simulation according to an exemplary embodiment;

[0036] Figure 7 It is a block diagram showing a wheel force simulation device according to an exemplary embodiment;

[0037] Figure 8 It is a block diagram showing an electronic device according to an exemplary embodiment. Detailed implementation manners

[0038] In order to enable those of ordinary skill in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0040] For ease of understanding, the following introduces technical terms with reference to the accompanying drawings.

[0041] Implicit analysis: Based on the implicit time integration method and iteratively solving the system of equations, it is applicable to static and quasi-static problems, such as structural strength analysis and heat conduction problems. The single-step calculation cost of implicit analysis is high, but the total number of steps is small, and it is applicable to low-speed and long-term stable problems.

[0042] Explicit analysis: Based on the explicit time integration method, no iterative process is required, and the physical quantities of the next time step are directly calculated according to the known physical quantities of the current time step and the information of the previous time step. The calculation speed of explicit analysis is fast, but a smaller time step size is required, and it is usually applicable to high-speed dynamic problems, such as collisions, impacts, and explosions, etc.

[0043] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0044] The wheel force simulation method for a wheel assembly provided in the embodiments of the present application can be applied to the wheel force simulation of the wheel assembly of a vehicle. A vehicle can also be referred to as a transportation vehicle (vehicle), a mobile carrier (mobile carrier), an electric vehicle (electric vehicle, EV), a hybrid electric vehicle (hybrid electric vehicle, HEV), a plug-in hybrid electric vehicle (plug-in hybrid electric vehicle, PHEV), a fuel cell vehicle (fuel cell vehicle, FCV), an autonomous vehicle (autonomous vehicle), an intelligent and connected vehicle (intelligent and connected vehicle, ICV), a driverless vehicle (driverless vehicle), etc.

[0045] In the embodiments of the present application, the vehicle can be a sedan, a sport utility vehicle (SUV), a truck, an electric vehicle, a motorcycle, a tricycle, a special vehicle (such as an ambulance, a fire truck, a police car, etc.), a driverless taxi, an intelligent and connected bus, an autonomous logistics vehicle, an electric truck, etc. In addition, this method is also applicable to various special vehicles, such as agricultural vehicles, mining vehicles, forestry vehicles, airport vehicles, port vehicles, etc. The present application does not make specific limitations on this.

[0046] As Figure 1 shown, Figure 1 the wheel force simulation system in

[0047] Optionally, Figure 1 a communication connection can be established between the wheel force simulation device 101 and the data acquisition device 102 in

[0048] In practical applications, the wheel force simulation device 101 can be communicatively connected to one or more data acquisition devices 102.

[0049] For the sake of easy understanding, the present application takes the case where a communication connection is established between one wheel force simulation device 101 and one data acquisition device 102 as an example for illustration.

[0050] Optionally, Figure 1The wheel force simulation device 101 and the data acquisition device 102 in it can be functional modules integrated in the same device or independent devices. This application does not limit this.

[0051] It is easy to understand that when the wheel force simulation device 101 and the data acquisition device 102 are functional modules integrated in the same device, the communication method between the wheel force simulation device 101 and the data acquisition device 102 is the communication between internal modules of the device. In this case, the communication process between the two is the same as the "communication process when the wheel force simulation device 101 and the data acquisition device 102 are independently set".

[0052] For the convenience of understanding, this application mainly takes the case where the wheel force simulation device 101 and the data acquisition device 102 are independently set as an example for illustration.

[0053] Figure 1 The data acquisition device 102 in it can obtain the parameters of the punch rigid body and the parameters of the wheel assembly, and send the parameters of the punch rigid body and the parameters of the wheel assembly to the wheel force simulation device 101. The wheel force simulation device 101 can construct a punch rigid body model and a wheel assembly simulation model based on the parameters of the punch rigid body and the parameters of the wheel assembly, and apply an impact force to the wheel assembly simulation model through the punch rigid body model based on the motion constraint conditions of the punch rigid body model, so as to perform wheel force simulation on the wheel assembly simulation model, obtain an explicit analysis result of the wheel assembly simulation model, and further perform an implicit analysis on the explicit analysis result to obtain the plastic deformation amount of the inner wheel flange of the wheel.

[0054] Optionally, Figure 1 The wheel force simulation device 101 in it can be a terminal, a server, or other types of electronic devices. Figure 1 What is shown in it is only an example of the device form of the wheel force simulation device 101, and it does not limit it.

[0055] When the wheel force simulation device 101 is a terminal, the terminal can be a device that provides voice and / or data connectivity to the user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The terminal can communicate with one or more core networks via a radio access network (RAN). The terminal can be a mobile terminal, such as a computer with a mobile terminal, which exchanges language and / or data with the radio access network. For example, mobile phones, tablets, laptops, netbooks, personal digital assistants (PDAs). This application does not make any restrictions on this.

[0056] In the case where the wheel force simulation device 101 of the wheel assembly is a server, the server can be a single server, or it can also be a server cluster composed of multiple servers. In some embodiments, the server cluster can also be a distributed cluster. This application does not impose any restrictions on this.

[0057] It should be noted that the structure illustrated in the embodiments of this application does not limit the wheel force simulation system. It may include more or fewer components than shown in the figures, or combine certain components, or split certain components, or have different component arrangements. The illustrated components can be implemented in hardware, software, or a combination of software and hardware.

[0058] Figure 2 is a flowchart of a wheel force simulation method shown according to an exemplary embodiment. As Figure 2 shown, the wheel force simulation method includes the following steps: S201 - S202.

[0059] S201. By modeling the wheel assembly simulation model, a suspension force simulation model is obtained.

[0060] Among them, the wheel assembly simulation model is used to represent a wheel with a tire and a wheel hub, and an assembly preload has been applied to the wheel hub and the tire, and the tire has been inflated.

[0061] In a possible implementation manner, the wheel force simulation device obtains a tire simulation model and a wheel hub simulation model.

[0062] Optionally, the wheel force simulation device can obtain a pre - constructed tire simulation model and a wheel hub simulation model, or it can obtain the relevant data of the tire and the wheel hub, and construct a tire simulation model based on the relevant data of the tire, and construct a wheel hub simulation model based on the relevant data of the wheel hub.

[0063] Among them, the relevant data of the tire and the wheel hub may include:

[0064] (1) When the tire is assembled on the wheel hub, the contour data of the tire, the internal rubber layer distribution data, the reinforcing layer distribution data, and the density data.

[0065] (2) The hyperelastic material parameters of various rubber surfaces of the tire, and the elastic material parameters of the reinforcing layer.

[0066] (3) The elastoplastic material parameters of the wheel.

[0067] (4) The interference fit amount between the tire and the wheel hub.

[0068] (5) The measured modal data and radial stiffness data of the tire.

[0069] In a possible implementation, the wheel force simulation device may integrate a tire simulation model and a wheel hub simulation model based on a second constraint condition to obtain an initial wheel assembly simulation model.

[0070] Among them, the second constraint condition is the second constraint condition between the tire and the wheel hub in the wheel assembly. The second constraint condition between the tire and the wheel hub may at least include a fourth sub-constraint and a fifth sub-constraint. The fourth sub-constraint is used to characterize the frictional contact constraint between the tire and the wheel hub. The fifth sub-constraint is used to characterize the constraint on the fluid cavity between the tire and the wheel hub. The frictional contact constraint may include the frictional contact relationship and the friction coefficient between the tire and the wheel hub. The frictional contact relationship may include the contact position and contact area between the tire and the wheel hub. The constraint on the fluid cavity may be used to characterize the constraint on the gas or liquid medium between the tire and the wheel hub.

[0071] In a possible implementation, the tire in the initial wheel assembly simulation model is inflated, and an assembly pre-tightening force is applied to the wheel hub and the tire to obtain a wheel assembly simulation model.

[0072] Among them, the assembly pre-tightening force refers to the continuous positive pressure between the tire and the wheel hub during the assembly process of the tire and the wheel hub.

[0073] Optionally, the assembly pre-tightening force can be determined by simulating the application of a temperature load to the initial wheel assembly simulation model, or can be determined by actual parameters. The present application does not make specific limitations on this.

[0074] Optionally, the inflation pressure for inflating the tire can be set according to actual needs. For example, the inflation pressure can be 250 kilopascals (kPa), or can be 220 kPa. The present application does not make specific limitations on this.

[0075] In a possible implementation, the wheel force simulation device may obtain the suspension system components of the vehicle suspension system, as well as the damping and stiffness of each suspension system component.

[0076] Among them, the suspension system components may include mechanical connectors (rigid components), elastic components, damping components, and auxiliary components. The mechanical connectors may include control arms, steering knuckles, subframes, stabilizer bar links, etc. The elastic components may include bushings, coil springs, shock absorbers, rubber limit blocks, etc. The damping components may include dampers, etc. The auxiliary components may include sensors, etc.

[0077] In a possible implementation, the wheel force simulation device can assemble suspension system components to the wheel assembly simulation model to obtain an initial suspension force simulation model. The wheel force simulation device can set the damping and stiffness of each suspension system component in the initial suspension force simulation model to obtain a suspension force simulation model.

[0078] Exemplarily, the wheel force simulation device can, through the connector function in the software, assemble the suspension system components and the wheel assembly simulation model together according to the 1 / 4 vehicle suspension hard point layout to obtain an initial suspension force simulation model. The wheel force simulation device can set the initial suspension force simulation model through the damping and stiffness of each suspension system component to obtain a suspension force simulation model. The suspension force simulation model is as Figure 3 shown. Figure 3 Also shown in it are examples in the longitudinal (X), transverse (Y), and vertical (Z) directions.

[0079] S202. By controlling a rigid pavement obstacle to move towards the wheel in the suspension force simulation model at a specified speed in the simulation environment, the force simulation of the suspension force simulation model under the obstacle-crossing condition is realized, and the mechanical response of the inner wheel rim of the wheel is obtained.

[0080] Among them, the mechanical response can include the strain value or deformation amount of the inner edge of the wheel.

[0081] In a possible implementation, the wheel force simulation device can set a first constraint condition for the wheel assembly simulation model before controlling a rigid pavement obstacle to move towards the wheel in the suspension force simulation model at a specified speed in the simulation environment.

[0082] Among them, the first constraint condition can include a first sub-constraint, a second sub-constraint, and a third sub-constraint. The first sub-constraint can be used to characterize the constraint on the friction force between the wheel assembly simulation model and the road surface. The second sub-constraint can be used to characterize the constraint on the static force of the wheel assembly simulation model. The third sub-constraint can be used to characterize the constraint on the rotational freedom of the wheel assembly simulation model.

[0083] In a possible implementation, the wheel force simulation device can obtain the friction force between the tire and different road surfaces and set different friction force constraints according to the simulation environment.

[0084] It can be understood that, when the tire is fixed, the friction force between the tire and different road surfaces is related to the road surface properties of the road surface. The road surface properties can include at least one of material, humidity, and icing state.

[0085] Exemplarily, the material may include at least one of asphalt, concrete, soil, bricks, stones, and metals. The humidity may include at least one of dry, wet, waterlogged, and partially waterlogged. The icing state may include at least one of snow, ice-water mixture, frost, and freezing rain.

[0086] Exemplarily, as shown in Table 1, Table 1 shows the frictions corresponding to different road surfaces.

[0087] Table 1

[0088]

[0089]

[0090] In some embodiments, the wheel force simulation device may determine the friction between the tire and different road surfaces through the dynamic data collected in real time during the vehicle driving process.

[0091] In a possible implementation manner, the wheel force simulation device may collect the dynamic data in real time during the vehicle driving process through multiple sensors deployed on the vehicle, such as wheel speed and braking pressure, etc. The processing device may perform filtering processing on the collected original data to eliminate the influence of noise and outliers. The wheel force simulation device may calculate the slip ratio of the wheel according to the collected dynamic data, and thus determine the friction between the tire and different road surfaces based on the slip ratio of the wheel and the preset mapping relationship.

[0092] Among them, the preset mapping relationship may include the frictions between the measured tires and different road surfaces corresponding to multiple measured slip ratios respectively. The preset mapping relationship may be the mapping relationship obtained by performing braking tests on the vehicle under different road surfaces (dry asphalt, wet asphalt, snow, etc.).

[0093] In a possible implementation manner, the wheel force simulation device may perform an implicit analysis on the downward pressure condition of the suspension force simulation model to obtain the stable static force result of the wheel assembly simulation model after being subjected to the suspension load. The wheel force simulation device may use the static force result as the second sub-constraint.

[0094] Exemplarily, the simulation of the downward pressure condition of the suspension force simulation model is as Figure 4 shown. For example, the simulation in the X direction and the Y direction.

[0095] In a possible implementation manner, after setting the first constraint condition for the wheel assembly simulation model, the wheel force simulation device may move a rigid body road surface obstacle in the simulation environment towards the wheel in the suspension force simulation model at a specified speed to implement the force simulation of the suspension force simulation model under the obstacle-crossing condition, and obtain the mechanical response of the inner wheel flange.

[0096] Exemplarily, the force simulation under the obstacle-crossing condition is as Figure 5 shown. Figure 5 The mechanical responses at multiple positions of the wheel include +4.164e-04% (0.0004167%), +1.667e-03%, and +9.234e-01%. Among them, the mechanical response of the inner edge of the wheel is approximately +4.167e-03%.

[0097] In a possible implementation manner, the wheel force simulation device can perform force simulations on the suspension force simulation model under multiple obstacle-crossing conditions to obtain the cumulative mechanical response of the inner edge of the wheel.

[0098] S203. Perform implicit analysis on the mechanical response to obtain the stable strain result of the inner edge of the wheel.

[0099] In a possible implementation manner, the wheel force simulation device can preprocess the data recorded during the simulation, including steps such as removing noise and smoothing the data, to improve the accuracy of subsequent analysis.

[0100] Furthermore, the wheel force simulation device can process the mechanical response of the inner edge of the wheel to determine the stress distribution and strain state at each time node of the inner edge of the wheel. The wheel force simulation device can analyze the stress distribution and strain state at each time node of the inner edge of the wheel to obtain the stable strain result of the inner edge of the wheel.

[0101] S204. Update the suspension force simulation model according to the stable strain result.

[0102] In a possible implementation manner, the wheel force simulation device can optimize the connection parts and constraint conditions of the suspension system according to the stable strain result. For example, adjust the pre-tightening force of connection parts such as bolts and nuts, and adjust the contact conditions and friction coefficients between the suspension system and the wheel, etc.

[0103] S205. Re-execute the force simulation of the suspension force simulation model under the obstacle-crossing condition, update the suspension force simulation model according to the newly obtained stable strain result of the inner edge of the wheel until the number of executions reaches the preset number, and obtain the cumulative mechanical response of the inner edge of the wheel.

[0104] Optionally, the preset number can be set according to actual needs. For example, the preset number can be 10 times or 100 times. This application does not make specific limitations on this.

[0105] Based on the above technical solutions, the present application can directly simulate the contact mechanics process during actual obstacle crossing by presetting the assembly pre-tightening force in the simulation model and the initial state of the pneumatic tire, and combining the active movement of the obstacle to replace the rotation of the wheel. This avoids the problem in the related art that when the wheel rotates, explicit simulation requires slow acceleration to avoid wheel disintegration, resulting in too high simulation time cost, and the problem that implicit analysis cannot converge due to extremely large deformation under collision conditions. In addition, by fixing the wheel position and controlling the movement of the obstacle, the transient response of the vehicle crossing the obstacle at a constant speed can be directly simulated, improving the simulation efficiency. Moreover, by iteratively simulating multiple obstacle crossings, the cumulative strain of the inner edge and the expansion of the plastic zone can be accurately evaluated, providing a reliable basis for fatigue life prediction. In addition, through implicit analysis, the high-frequency fluctuations in the obstacle-crossing impact can be filtered to obtain the steady-state mechanical response of the material, avoiding the true damage being masked by transient peaks.

[0106] In some embodiments, as Figure 6 shown, Figure 6 the wheel force simulation process includes the following steps: S601 - S607.

[0107] S601. Obtain the wheel assembly simulation model.

[0108] S602. Construct a rigid body road surface obstacle model and a suspension force simulation model based on the wheel assembly simulation model.

[0109] S603. Perform a static implicit loading simulation on the suspension force simulation model to obtain the static force result.

[0110] S604. Use the static force result as the initial state of the suspension force simulation model, and perform a force simulation on the suspension force simulation model under the obstacle-crossing condition.

[0111] S605. Determine the mechanical response of the inner wheel rim of the wheel.

[0112] S606. Use the mechanical response of the inner wheel rim as the initial state of the suspension force simulation model, and perform a force simulation on the suspension force simulation model under multiple obstacle-crossing conditions.

[0113] S607. Determine the cumulative mechanical response of the inner edge of the wheel.

[0114] Figure 7 is a block diagram of a wheel force simulation device shown according to an exemplary embodiment. Referring to Figure 7 , the wheel force simulation device includes: a construction unit 701 and a processing unit 702.

[0115] In a possible way, the construction unit 701 is used to obtain a suspension force simulation model by modeling the wheel assembly simulation model.

[0116] In one possible way, the processing unit 702 is configured to move a rigid pavement obstacle in a simulation environment at a specified speed towards a wheel in a suspension force simulation model, so as to implement the force simulation of the suspension force simulation model under an obstacle-crossing condition, and obtain the mechanical response of the inner wheel rim.

[0117] In one possible way, the processing unit 702 is further configured to perform an implicit analysis on the mechanical response to obtain the stable strain result of the inner edge of the wheel.

[0118] In one possible way, the processing unit 702 is further configured to update the suspension force simulation model according to the stable strain result.

[0119] In one possible way, the processing unit 702 is further configured to re-perform the force simulation of the suspension force simulation model under the obstacle-crossing condition, update the suspension force simulation model according to the re-obtained stable strain result of the inner edge of the wheel until the number of executions reaches a preset number, and obtain the cumulative mechanical response of the inner edge of the wheel.

[0120] In one possible way, the processing unit 702 is further configured to set the constraint conditions for the wheel assembly simulation model.

[0121] In one possible way, the construction unit 701 is specifically configured to: assemble suspension system components to the wheel assembly simulation model to obtain an initial suspension force simulation model. Set the damping and stiffness of each suspension system component in the initial suspension force simulation model to obtain the suspension force simulation model.

[0122] In one possible way, the construction unit 701 is further configured to: obtain a tire simulation model and a wheel hub simulation model. Integrate the tire simulation model and the wheel hub simulation model based on a second constraint condition, where the second constraint condition is the second constraint condition between the tire and the wheel hub in the wheel assembly, to obtain an initial wheel assembly simulation model. Inflate the tire in the initial wheel assembly simulation model, and apply an assembly pre-tightening force to the wheel hub and the tire to obtain the wheel assembly simulation model.

[0123] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0124] Figure 8 is a block diagram of an electronic device shown according to an exemplary embodiment. As Figure 8 shown, the electronic device includes but is not limited to: a processor 801 and a memory 802.

[0125] Among them, the above-mentioned memory 802 is used to store executable instructions of the above-mentioned processor 801. It can be understood that the above-mentioned processor 801 is configured to execute instructions to implement the wheel force simulation method in the above-mentioned embodiments.

[0126] It should be noted that those skilled in the art can understand that Figure 8 the structure of the electronic device shown in Figure 8 does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than

[0127] shown, or combine some components, or have different component arrangements.

[0128] The processor 801 is the control center of the electronic device, connecting various parts of the entire electronic device through various interfaces and lines. By running or executing software programs and / or modules stored in the memory 802, and by calling data stored in the memory 802, it executes various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 801 may include one or more processing units. Optionally, the processor 801 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the processor 801 either.

[0129] In an exemplary embodiment, there is also provided a computer-readable storage medium including instructions, such as the memory 802 including instructions. The above-mentioned instructions can be executed by the processor 801 of the electronic device to implement the method in the above-mentioned embodiments.

[0130] In actual implementation, Figure 7 the functions of the construction unit 701 and the processing unit 702 in Figure 8 can all be implemented by the processor 801 in

[0131] Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium. For example, the non-transitory computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0132] In an exemplary embodiment, the embodiments of the present application further provide a computer program product including one or more instructions, and the one or more instructions can be executed by a processor 801 of an electronic device to complete the method in the above embodiments.

[0133] It should be noted that when the instructions in the above computer-readable storage medium or the one or more instructions in the computer program product are executed by the processor of the electronic device, each process of the above method embodiment is implemented, and the same technical effects as the above method can be achieved. To avoid repetition, it will not be elaborated here.

[0134] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above functional modules is used as an example. In practical applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0135] In several embodiments provided by the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules or units is only a logical functional division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0136] The unit described as a separated component may or may not be physically separated. The component displayed as a unit may be a physical unit or multiple physical units, that is, it may be located in one place, or may be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0137] In addition, in each embodiment of the present application, each functional unit can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0138] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions for causing a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0139] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wheel force simulation method, characterized in that, The method includes: Modeling a wheel assembly simulation model to obtain a suspension force simulation model; wherein, the wheel assembly simulation model is used to represent a wheel with a tire and a wheel hub, and assembly pre-tightening force has been applied to the wheel hub and the tire, and the tire has been inflated; Controlling a rigid pavement obstacle to move towards the wheel in the suspension force simulation model at a specified speed in a simulation environment to implement the force simulation of the suspension force simulation model under an obstacle-crossing condition, and obtaining the mechanical response of the inner wheel rim; Performing implicit analysis on the mechanical response to obtain the stable strain result of the inner edge of the wheel; Updating the suspension force simulation model according to the stable strain result; Re-executing the force simulation of the suspension force simulation model under the obstacle-crossing condition, and updating the suspension force simulation model according to the newly obtained stable strain result of the inner edge of the wheel until the number of executions reaches a preset number, and obtaining the cumulative mechanical response of the inner edge of the wheel.

2. The wheel force simulation method according to claim 1, wherein The mechanical response includes the strain value or deformation amount of the inner edge of the wheel.

3. The wheel force simulation method according to claim 1, characterized in that, Before controlling the rigid pavement obstacle to move towards the wheel in the suspension force simulation model at a specified speed in the simulation environment, the method further includes: Setting a first constraint condition for the wheel assembly simulation model.

4. The wheel force simulation method according to claim 3, wherein The first constraint condition includes a first sub-constraint, a second sub-constraint, and a third sub-constraint; the first sub-constraint is used to represent the constraint on the friction force between the wheel assembly simulation model and the road surface; the second sub-constraint is used to represent the constraint on the static force of the wheel assembly simulation model; the third sub-constraint is used to represent the constraint on the rotational degree of freedom of the wheel assembly simulation model.

5. The wheel force simulation method according to claim 1, characterized in that The step of obtaining the suspension force simulation model by modeling the wheel assembly simulation model includes: Assembling suspension system components to the wheel assembly simulation model to obtain an initial suspension force simulation model; Setting the damping and stiffness of each suspension system component in the initial suspension force simulation model to obtain the suspension force simulation model.

6. The wheel force simulation method according to claim 1, characterized in that The wheel assembly simulation model is constructed in the following manner: Obtaining a tire simulation model and a wheel hub simulation model; Integrating the tire simulation model and the wheel hub simulation model based on a second constraint condition, where the second constraint condition is the second constraint condition between the tire and the wheel hub in the wheel assembly, to obtain an initial wheel assembly simulation model; Inflating the tire in the initial wheel assembly simulation model and applying assembly pre-tightening force to the wheel hub and the tire to obtain the wheel assembly simulation model.

7. A wheel force simulation device, characterized in that, The device includes: a construction unit and a processing unit; The construction unit is configured to obtain a suspension force simulation model by modeling a wheel assembly simulation model; wherein, the wheel assembly simulation model is used to represent a wheel with a tire and a wheel hub, and assembly pre-tightening force has been applied to the wheel hub and the tire, and the tire has been inflated; The processing unit is configured to move a rigid pavement obstacle at a specified speed towards the wheel in the suspension force simulation model in a simulation environment, so as to perform a force simulation of the suspension force simulation model under an obstacle-crossing condition, and obtain a mechanical response of the inner wheel rim; The processing unit is further configured to perform an implicit analysis on the mechanical response to obtain a stable strain result of the inner edge of the wheel; The processing unit is further configured to update the suspension force simulation model according to the stable strain result; The processing unit is further configured to re-perform the force simulation of the suspension force simulation model under the obstacle-crossing condition, update the suspension force simulation model according to the re-obtained stable strain result of the inner edge of the wheel, until the number of executions reaches a preset number, and obtain the cumulative mechanical response of the inner edge of the wheel.

8. The wheel force simulation device according to claim 7, wherein The processing unit is further configured to set a first constraint condition for the wheel assembly simulation model.

9. The wheel force simulation device according to claim 1, characterized in that, The building unit is specifically configured to: Assemble suspension system components to the wheel assembly simulation model to obtain an initial suspension force simulation model; Set the damping and stiffness of each suspension system component in the initial suspension force simulation model to obtain a suspension force simulation model.

10. An electronic device, characterized in that, Comprising: A processor; A memory for storing instructions executable by the processor; Wherein, the processor is configured to execute the instructions to implement the method according to any one of claims 1 to 6.

Images