Impact stress simulation method, device and equipment for wheel assembly

Abstract

The invention relates to an impact stress simulation method, device and equipment for a wheel assembly, and relates to the technical field of electric digital data processing.The method comprises the steps that a punch rigid body model and a wheel assembly simulation model are constructed, impact force is applied to the wheel assembly simulation model through the punch rigid body model on the basis of motion constraint conditions of the punch rigid body model, and the wheel assembly simulation model is obtained. Performing impact stress simulation on the wheel assembly simulation model to obtain an explicit analysis result of the wheel assembly simulation model; the motion constraint condition of the punch rigid body model is used for constraining the punch rigid body model to only move along the radial direction of the tire; the explicit analysis result is used for representing physical response characteristics of the wheel assembly simulation model in the impact stress simulation process; and implicit analysis is conducted on the explicit analysis result, and the plastic deformation of the inner rim of the wheel is obtained. Therefore, accurate prediction of the rim deformation under the impact working condition can be realized.

Description

Technical Field

[0001] This application relates to the technical field of electric digital data processing, especially the field of simulation technology, and particularly relates to a method, device, and equipment for simulating the impact force on a wheel assembly. Background Art

[0002] As a core load-bearing component of a vehicle's driving system, the structural strength of a wheel is directly related to the safety and reliability of the vehicle. Under complex road conditions, the wheel needs to withstand the combined effects of road surface impacts, dynamic loads, and alternating stresses. Among them, the inner wheel rim, as the key area where the wheel is combined with the tire, its structural strength is crucial for the overall performance of the wheel. Therefore, the research on structural strength is of great importance.

[0003] However, with the increasing requirements for lightweight and high performance of new energy vehicles, wheel design is gradually evolving towards thinner walls and high-strength materials. The traditional design experience and static simulation methods based on fuel vehicles are no longer sufficient. Therefore, it is necessary to explore a high-precision simulation method to accurately predict the deformation of the wheel rim under impact conditions. Summary of the Invention

[0004] This application provides a method, device, and equipment for simulating the impact force on a wheel assembly to at least solve the technical problem in the related art that it is impossible to accurately predict the deformation of the wheel rim under impact conditions. The technical solution of this application is as follows: According to the first aspect provided by this application, a method for simulating the impact force on a wheel assembly is provided, including: constructing a punch rigid body model and a wheel assembly simulation model; where 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 assembly pre-tightening force, and the tire has been inflated; based on the motion constraint conditions of the punch rigid body model, applying an impact force to the wheel assembly simulation model through the punch rigid body model to perform an impact force simulation on the wheel assembly simulation model and obtain an explicit analysis result of the wheel assembly simulation model; the motion constraint conditions of the punch rigid body model are used to constrain the punch rigid body model to only move along the radial direction of the tire; the explicit analysis result is used to represent the physical response characteristics of the wheel assembly simulation model during the impact force simulation; performing an implicit analysis on the explicit analysis result to obtain the plastic deformation amount of the inner wheel rim of the wheel.

[0005] According to the above technical means, this application can construct real boundary conditions (pre-tightening stress distribution, air pressure load) through the vehicle assembly simulation model to accurately reflect the mechanical characteristics of the actual wheel during the simulation process, and realize the efficient simulation of the dynamic impact process and the accurate prediction of static plastic deformation through explicit-implicit combined analysis.

[0006] In a possible way, the explicit analysis result at least includes the stable strain result of the inner wheel rim of the wheel.

[0007] In one possible way, the method further includes: elastically connecting the wheel mounting disc part of the assembly to the punch rigid body model at the target coordinate point, and setting the connection stiffness of the elastic connection to a preset stiffness; wherein, the target coordinate point is any coordinate point on the impact path.

[0008] According to the above technical means, the present application can simulate the actual working conditions and improve the authenticity of the simulation through the elastic connection and the setting of the preset stiffness, providing a more reliable simulation basis for the evaluation of the wheel impact resistance performance.

[0009] In one possible way, based on the motion constraint conditions of the punch rigid body model, an impact force is applied to the wheel assembly simulation model through the punch rigid body model to perform an impact force simulation on the wheel assembly simulation model, and an explicit analysis result of the wheel assembly simulation model is obtained, including: determining the field output data and the history output data of the wheel assembly simulation model during the impact force simulation process; the field output data is used to characterize the state data of the wheel assembly simulation model at a preset moment; the history output data is used to characterize the data of the state change of the preset position of the wheel assembly simulation model over time; based on the field output data and the history output data, the explicit analysis result is determined.

[0010] According to the above technical means, the present application can, through the collaborative analysis of the field output and the history output, analyze the distribution law of the impact force response from the spatial dimension and the dynamic change of the impact force response from the time dimension, so as to accurately analyze the impact force performance of the wheel assembly.

[0011] In one possible way, based on the field output data and the history output data, determining the explicit analysis result includes: determining the material parameters of each position of the wheel assembly; the material parameters are used to characterize the mechanical behavior of the material under mechanical loads; based on the material parameters, an explicit analysis is performed on the field output data and the history output data to obtain the explicit analysis result.

[0012] According to the above technical means, the present application can accurately simulate the response of the material under actual working conditions by determining the material parameters of each position of the wheel assembly, and thus perform an explicit analysis on the field output data and the history output data through the material parameters, which can accurately reflect the true mechanical behavior of the materials at each position of the wheel assembly under different load paths, avoiding analysis deviations caused by inaccurate material parameters. In one possible way, before applying 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 to perform an impact force simulation on the wheel assembly simulation model, the method further includes: setting the impact analysis time, the field output, and the history output during the impact force simulation process.

[0013] According to the above technical means, the present application can avoid missing important mechanical responses due to too short time setting or wasting computing resources and distorting results due to too long time setting by reasonably setting the impact analysis time. In addition, by setting field output and history output, the change of the mechanical state of the wheel during the impact process can be comprehensively and accurately described, providing a reliable basis for subsequent analysis.

[0014] In one 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 constraint relationship, where the constraint relationship is the constraint relationship 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.

[0015] According to the above technical means, the present application can construct a wheel assembly simulation model by integrating the tire and hub models, avoiding the problems of mechanical transmission distortion and incomplete boundary conditions caused by the simulation analysis methods without tires or with simplified tires in the related art. Therefore, the present application can improve the simulation accuracy and reliability of the wheel.

[0016] According to the second aspect provided by the present application, there is provided an impact force simulation device for a wheel assembly, including: a construction unit and a processing unit; the construction unit is used to construct a punch rigid body model and 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 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 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 to perform an impact force simulation on the wheel assembly simulation model, and obtain an explicit analysis result of the wheel assembly simulation model; the motion constraint conditions of the punch rigid body model are used to constrain the punch rigid body model to move only in the radial direction of the tire; the explicit analysis result is used to represent the physical response characteristics of the wheel assembly simulation model during the impact force simulation process; the processing unit is further used to perform an implicit analysis on the explicit analysis result to obtain the plastic deformation amount of the inner wheel flange of the wheel.

[0017] In one possible way, the processing unit is further used to elastically connect the wheel mounting disc part of the assembly to the punch rigid body model at the target coordinate point, and set the connection stiffness of the elastic connection to a preset stiffness; wherein, the target coordinate point is any coordinate point on the impact path.

[0018] In a possible way, the processing unit is specifically configured to: determine the field output data and the history output data of the wheel assembly simulation model during the impact force simulation process; the field output data is used to characterize the state data of the wheel assembly simulation model at a preset moment; the history output data is used to characterize the data of the state change over time of a preset position of the wheel assembly simulation model; based on the field output data and the history output data, determine the explicit analysis result.

[0019] In a possible way, the processing unit is specifically configured to: determine the material parameters of each position of the wheel assembly; the material parameters are used to characterize the mechanical behavior of the material under mechanical loads; based on the material parameters, perform explicit analysis on the field output data and the history output data to obtain the explicit analysis result.

[0020] In a possible way, the processing unit is further configured to set the impact analysis time, field output, and history output during the impact force simulation process.

[0021] In a possible way, the construction unit is specifically configured to: obtain the tire simulation model and the wheel hub simulation model; based on the constraint relationship, integrate the tire simulation model and the wheel hub simulation model to obtain the initial wheel assembly simulation model, where the constraint relationship is the constraint relationship between the tire and the wheel hub in the wheel assembly; inflate the tire in the initial wheel assembly simulation model, and apply assembly pre-tightening force to the wheel hub and the tire to obtain the wheel assembly simulation model.

[0022] According to the 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.

[0023] According to the 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 the processor of the electronic device, enabling the electronic device to execute the method according to the first aspect and any possible implementation manner thereof.

[0024] According to the 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 the electronic device, enabling the electronic device to execute the method according to the first aspect and any possible implementation manner thereof.

[0025] 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.

[0026] 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

[0027] The drawings herein are incorporated into and constitute 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 of the present application.

[0028] Figure 1 is a schematic diagram of a shock force simulation system for a wheel assembly of a vehicle shown according to an exemplary embodiment; Figure 2 is a flowchart of a shock force simulation method for a wheel assembly shown according to an exemplary embodiment; Figure 3 is a schematic diagram of stable strain results of a wheel inner rim shown according to an exemplary embodiment; Figure 4 is a schematic diagram of a radial shock condition shown according to an exemplary embodiment; Figure 5 is a schematic diagram of the distribution of plastic deformation amounts of a wheel inner rim shown according to an exemplary embodiment; Figure 6 is a schematic diagram of a shock force simulation process for a wheel assembly shown according to an exemplary embodiment; Figure 7 is a block diagram of a shock force simulation device for a wheel assembly shown according to an exemplary embodiment; Figure 8 is a block diagram of an electronic device shown according to an exemplary embodiment. Detailed Description of the Embodiments

[0029] 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.

[0030] 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 have to be used to describe a specific order or sequence. It should be understood that such data used may be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. 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.

[0031] For ease of understanding, the shock force simulation method for a wheel assembly provided by the present application will be specifically introduced below with reference to the accompanying drawings.

[0032] Next, the technical solutions in the embodiments of the present application will be described in conjunction with 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.

[0033] The impact force simulation method for the wheel assembly provided by the embodiments of the present application can be applied to the impact force simulation of the wheel assembly of a vehicle. A vehicle can also be referred to as a means of transportation (vehicle), mobile carrier, electric vehicle (EV), hybrid electric vehicle (HEV), plug-in hybrid electric vehicle (PHEV), fuel cell vehicle (FCV), autonomous vehicle, intelligent and connected vehicle (ICV), driverless vehicle, etc.

[0034] In the embodiments of the present application, the vehicle can be a sedan, sport utility vehicle (SUV), truck, electric vehicle, motorcycle, tricycle, special vehicle (such as ambulance, fire truck, police car, etc.), driverless taxi, intelligent connected bus, autonomous logistics vehicle, 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 restrictions on this.

[0035] As Figure 1 shown, Figure 1 the impact force simulation system for the wheel assembly of the vehicle in

[0036] Optionally, Figure 1 a communication connection can be established between the impact force simulation device 101 and the data acquisition device 102 in

[0037] In practical applications, the impact force simulation device 101 can be communicatively connected to one or more data acquisition devices 102.

[0038] For the sake of easy understanding, the present application takes the communication connection between one impact force simulation device 101 and one data acquisition device 102 as an example for illustration.

[0039] Optionally, Figure 1The impact force simulation device 101 and the data acquisition device 102 in it can be functional modules integrated into the same device, or they can be devices independently set up. This application does not limit this.

[0040] It is easy to understand that when the impact force simulation device 101 and the data acquisition device 102 are functional modules integrated into the same device, the communication method between the impact 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 impact force simulation device 101 and the data acquisition device 102 are independently set up".

[0041] For ease of understanding, this application mainly takes the case where the impact force simulation device 101 and the data acquisition device 102 are independently set up as an example for illustration.

[0042] 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 impact force simulation device 101. The impact 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 an impact 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.

[0043] Optionally, Figure 1 The impact 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 impact force simulation device 101, and it does not limit it.

[0044] In the case where the impact 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, tablet computers, laptop computers, netbooks, personal digital assistants (PDAs). This application does not make any restrictions on this.

[0045] When the impact 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. The present application does not impose any restrictions on this.

[0046] It should be noted that the structure illustrated in the embodiments of the present application does not limit the impact force simulation system of the vehicle's wheel assembly. It may include more or fewer components than those shown, 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.

[0047] Figure 2 is a flowchart of a method for simulating the impact force on a wheel assembly according to an exemplary embodiment, as Figure 2 shown, the method for simulating the impact force on the wheel assembly includes the following steps: S201. Construct a punch rigid body model and a wheel assembly simulation model.

[0048] Among them, the wheel assembly simulation model is used to represent the wheel assembly 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.

[0049] Optionally, the punch can be a V-shaped punch or a U-shaped punch. The present application does not make specific restrictions on this.

[0050] In a possible implementation manner, the impact force simulation device acquires a tire simulation model and a wheel hub simulation model.

[0051] Optionally, the impact force simulation device can acquire a pre-constructed tire simulation model and a wheel hub simulation model, or it can also acquire 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 simulation model of the wheel hub.

[0052] Among them, the relevant data of the tire and the wheel hub may include: (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.

[0053] (2) The hyperelastic material parameters of various rubber surfaces of the tire, and the elastic material parameters of the reinforcing layer.

[0054] (3) The elastoplastic material parameters of the wheel.

[0055] (4) The interference fit amount between the tire and the wheel hub.

[0056] (5) Measured modal data and radial stiffness data of the tire.

[0057] In a possible implementation, the impact force simulation device can integrate the tire simulation model and the wheel hub simulation model based on the constraint relationship to obtain the initial wheel assembly simulation model.

[0058] Among them, the constraint relationship is the constraint relationship between the tire and the wheel hub in the wheel assembly. The constraint relationship between the tire and the wheel hub can at least include a first sub-constraint and a second sub-constraint. The first sub-constraint is used to characterize the frictional contact constraint between the tire and the wheel hub. The second sub-constraint is used to characterize the constraint on the fluid cavity between the tire and the wheel hub. The frictional contact constraint can include the frictional contact relationship and the friction coefficient between the tire and the wheel hub. The frictional contact relationship can include the contact position and contact area between the tire and the wheel hub. The constraint on the fluid cavity can be used to characterize the constraint on the gas or liquid medium between the tire and the wheel hub.

[0059] 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 the wheel assembly simulation model.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] In one embodiment, the punch rigid body model is constructed by the following method: In a possible implementation, the impact force simulation device can obtain the punch parameters of the punch.

[0064] Among them, the punch parameters can include the punch tip angle, the punch tip fillet radius, the punch height, etc.

[0065] In a possible implementation, the impact force simulation device can draw the punch profile (such as V-shaped, U-shaped) in the simulation software and generate a three-dimensional punch model. The impact force simulation device can set the three-dimensional punch model as a rigid body in the simulation software to ignore the deformation behavior of the punch.

[0066] In a possible implementation manner, the impact force simulation device can set the friction coefficient and motion constraint conditions of the punch in simulation software to obtain a rigid body model of the punch.

[0067] Among them, the motion constraint conditions of the rigid body model of the punch are used to constrain the rigid body model of the punch to move only in the radial direction of the tire.

[0068] S202. Based on the motion constraint conditions of the rigid body model of the punch, apply an impact force to the wheel assembly simulation model through the rigid body model of the punch to perform an impact force simulation on the wheel assembly simulation model, and obtain an explicit analysis result of the wheel assembly simulation model.

[0069] Among them, the explicit analysis result can be used to characterize the physical response characteristics of the wheel assembly simulation model during the impact force simulation process. The explicit analysis result can include the stable strain result of the inner wheel rim of the wheel, the stress distribution, displacement distribution, temperature distribution, etc. of the wheel assembly simulation model.

[0070] Exemplarily, the stable strain result of the inner wheel rim of the wheel is as Figure 3 shown. Figure 3 It shows the stable strain result of the inner wheel rim of the wheel. For example, the maximum strain result is 0.4033%, that is, the maximum deformation ratio of the inner wheel rim of the wheel relative to its original size is 0.4033%. The strain results at other positions also include 0.2017%, 0.1681%, 0.06722%, 0.

[0071] In a possible implementation manner, before applying an impact force to the wheel assembly simulation model through the rigid body model of the punch based on the motion constraint conditions of the rigid body model of the punch to perform an impact force simulation on the wheel assembly simulation model and obtain the stable strain result of the inner wheel rim of the wheel, the impact force simulation device can set the impact analysis time, field output, and history output during the impact force simulation process.

[0072] Among them, the impact analysis time can include the total analysis time and the time increment. The total analysis time can be used to characterize. The time increment can be used to characterize the total duration of the simulation, that is, the time from the start of the impact to the end of the impact. The time increment can be used to characterize the time interval of each calculation step in the simulation.

[0073] The field output is used to output the result data such as displacement, stress, strain, temperature, etc. of the entire wheel assembly simulation model or a partial area at each calculation step or a specific time point of the simulation. These data characterize the overall state of the analysis model at a specific moment, that is, the spatial distribution and change of the overall state of the wheel assembly simulation model.

[0074] The history output is used to output data such as displacement, velocity, acceleration, reaction force, etc. that change with time at a preset position during the simulation process. These data characterize the time change of the preset position and can be used for time change analysis.

[0075] Optionally, the total analysis time can be set according to actual needs. For example, the total analysis time can be 0.005 seconds or 0.0005 seconds. This application does not make specific restrictions on this.

[0076] Optionally, the time increment can be set according to actual needs. For example, the time increment can be 0.00002 seconds or 0.000001 seconds. This application does not make specific restrictions on this.

[0077] In another possible implementation, the impact force simulation device can set an impact velocity corresponding to the test requirements for the punch simulation model.

[0078] Exemplarily, the impact force simulation device can set the impact velocity to 5 meters per second (m / s) or 10 m / s. This application does not make specific restrictions on this.

[0079] In a possible implementation, the impact force simulation device can 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 an impact force simulation on the wheel assembly simulation model and determine the field output data and history output data of the wheel assembly simulation model during the impact force simulation process.

[0080] Among them, the field output data can be used to characterize the state data of the wheel assembly simulation model at a preset moment, such as the stress, strain, temperature and other result data of the wheel assembly simulation model at the preset moment. The history output data is used to characterize the data of the state change with time at a preset position of the wheel assembly simulation model, that is, the data such as displacement, velocity, acceleration, reaction force, etc. that change with time at the preset position.

[0081] Exemplarily, as Figure 4 shown, Figure 4 the radial impact condition in

[0082] In a possible implementation, in order to determine the explicit analysis result based on the field output data and the history output data, the impact force simulation model can determine the material parameters of each position of the wheel assembly simulation model.

[0083] Among them, the material parameters can be used to characterize the mechanical behavior of the material under mechanical loads, including the yield strength, hardening coefficient, elastic modulus, fracture strain, etc. of the material.

[0084] In a possible implementation, the impact force simulation model can perform explicit analysis on the field output data and the history output data based on material parameters to obtain explicit analysis results.

[0085] In one example, the impact force simulation device can extract the maximum stress value and its location of the wheel assembly at each preset moment in the field output data, and determine whether there is strain based on material parameters. For example, if the material yield strength is 235 Megapascals (MPa), and the stress in a certain area in the simulation reaches 250 MPa (exceeding the yield strength), it can be determined that this area enters the plastic deformation stage and there is a risk of plastic strain.

[0086] In another example, the impact force simulation device can extract the strain distribution of each position in the wheel assembly simulation model at different moments from the history output data, and analyze the deformation degree and potential damage of the wheel assembly simulation model under impact force simulation based on the fracture strain of the material (such as 0.2).

[0087] In another example, the impact force simulation device can extract the curve of stress change with time at a preset position, and calculate parameters such as the maximum stress, average stress, and stress amplitude. The impact force simulation device can analyze the fatigue life of the preset position through the fatigue limit of the material, as well as the maximum stress, average stress, and stress amplitude. For example, the fatigue limit of the material is 180 MPa, the maximum stress at the contact point between the wheel assembly and the ground is 300 MPa, the average stress is 150 MPa, and the stress amplitude is 150 MPa.

[0088] In a possible implementation, before determining the explicit analysis structure, the impact force simulation device can preprocess the field output data and the history output data.

[0089] Specifically, the impact force simulation device can perform data integrity detection on the field output data and the history output data, and perform data filtering on the field output data and the history output data to eliminate abnormal data caused by noise interference during the simulation process.

[0090] Exemplarily, the impact force simulation device can detect whether the data such as stress, strain, displacement, velocity, and acceleration at each preset moment (such as 0 s, 0.00001 s, 0.00002 s, etc.) in the field output data is complete. For example, if the stress data of the wheel rim is missing at a certain moment, it is necessary to check whether there is an error in the simulation model or an abnormality in data storage. The impact force simulation device can confirm whether the data sequence of the state data (such as stress and deformation) at a preset position (such as the connection point between the wheel rim and the spoke, the contact point between the tire and the ground) changes continuously over time.

[0091] In a possible implementation manner, the impact force simulation device may perform explicit analysis on the filtered field output data and the filtered history output data based on material parameters to obtain an explicit analysis result.

[0092] S203. Perform implicit analysis on the explicit analysis result to obtain the plastic deformation amount of the inner wheel flange of the wheel.

[0093] Among them, implicit analysis is a numerical method used to solve static or quasi-static problems in finite element analysis. Its core is to directly calculate the displacement, stress, and strain of the structure in the equilibrium state by iteratively solving a system of nonlinear equations. Compared with explicit analysis, implicit analysis is more suitable for the steady-state response analysis of material nonlinearity, large geometric deformation, or contact problems.

[0094] In a possible implementation manner, the impact force simulation device may extract the stress, strain, and displacement field data of the impact force simulation from the explicit analysis result and import them as the initial conditions for implicit analysis. In implicit analysis, the impact force simulation device may define material parameters and calculate the plastic deformation amount of the inner wheel flange of the wheel based on the stress state of the inner wheel flange in the explicit analysis result.

[0095] Exemplarily, the plastic deformation amount of the inner wheel flange of the wheel is as Figure 5 shown, and the unit is millimeter. The maximum plastic deformation amount is +1.062e+01, that is, 10.62 millimeters.

[0096] Based on the above technical solution, the present application can construct real boundary conditions (pre-tightening stress distribution, air pressure load) through the vehicle assembly simulation model to accurately reflect the mechanical characteristics of the actual wheel during the simulation process, and achieve efficient simulation of the dynamic impact process and accurate prediction of static plastic deformation through explicit-implicit combined analysis.

[0097] In some embodiments, as Figure 6 shown, Figure 6 the impact force simulation process of the wheel assembly in

[0098] includes the following steps: S601 - S606.

[0099] S601. Obtain the wheel assembly simulation model.

[0100] S602. Based on the punch parameters, construct a punch rigid body model and construct an impact force simulation environment.

[0101] S603. Set field output and history output.

[0102] S604. Determine the explicit analysis result.

[0103] S606. Perform implicit analysis based on the explicit analysis results to obtain the plastic deformation amount.

[0104] Figure 7 It is a block diagram of an impact force simulation device for a wheel assembly shown according to an exemplary embodiment. Refer to Figure 7 This impact force simulation device for the wheel assembly includes: a construction unit 701 and a processing unit 702.

[0105] In a possible way, the construction unit 701 is used to construct a punch rigid body model and a wheel assembly simulation model.

[0106] In a possible way, the processing unit 702 is used to 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 an impact force simulation on the wheel assembly simulation model and obtain an explicit analysis result of the wheel assembly simulation model.

[0107] In a possible way, the processing unit 702 is further used to perform implicit analysis on the explicit analysis result to obtain the plastic deformation amount of the inner wheel flange of the wheel.

[0108] In a possible way, the processing unit 702 is further used to elastically connect the wheel mounting disc part of the assembly to the punch rigid body model at the target coordinate point and set the connection stiffness of the elastic connection to a preset stiffness.

[0109] In a possible way, the processing unit 702 is specifically used to: determine the field output data and history output data of the wheel assembly simulation model during the impact force simulation. Based on the field output data and history output data, determine the explicit analysis result.

[0110] In a possible way, the processing unit 702 is specifically used to: determine the material parameters of each position of the wheel assembly. Based on the material parameters, perform explicit analysis on the field output data and history output data to obtain the explicit analysis result.

[0111] In a possible way, the processing unit 702 is further used to set the impact analysis time, field output, and history output during the impact force simulation.

[0112] In a possible way, the construction unit 701 is specifically used to: obtain a tire simulation model and a wheel hub simulation model. Based on the constraint relationship, integrate the tire simulation model and the wheel hub simulation model 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.

[0113] 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 herein.

[0114] 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.

[0115] 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 impact force simulation method of the wheel assembly in the above embodiments.

[0116] 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

[0117] shown, or combine some components, or have different component arrangements.

[0118] 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 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 modulation / demodulation processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modulation / demodulation processor mainly processes wireless communication. It can be understood that the above-mentioned modulation / demodulation processor may not be integrated into the processor 801 either.

[0119] In an exemplary embodiment, there is also provided a computer-readable storage medium including instructions, such as the memory 802 including instructions. The above instructions can be executed by the processor 801 of the electronic device to implement the method in the above embodiments.

[0120] In actual implementation, Figure 7The functions in the building block 701 and the processing unit 702 can both be implemented by a processor 801 in Figure 8 calling a computer program stored in a memory 802. For the specific execution process, reference can be made to the description of the method part in the foregoing embodiment, which will not be elaborated here.

[0121] 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 compact disc read-only memory (CD-ROM), magnetic tape, a floppy disk, and an optical data storage device, etc.

[0122] In an exemplary embodiment, the embodiment of the present application further provides 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 foregoing embodiment.

[0123] It should be noted that when the instructions in the foregoing computer-readable storage medium or the one or more instructions in the computer program product are executed by a processor of an electronic device, the various processes of the foregoing method embodiment are implemented, and the same technical effects as those of the foregoing method can be achieved. To avoid repetition, it will not be elaborated here.

[0124] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and conciseness of description, only the above division of each functional module is used as an example. In actual 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.

[0125] In several embodiments provided in 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 merely illustrative. For example, the division of modules or units is only a logical function 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 is that the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, and the indirect coupling or communication connection of the device or unit may be in an electrical, mechanical or other form.

[0126] The unit described as a separating component may or may not be physically separated. The component shown as a unit may be a single physical unit or multiple physical units, that is, it may be located in one place or distributed to multiple different places. Some or all of the classification units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0127] In addition, each functional unit in various embodiments of the present application may be integrated in a processing unit, may exist independently as individual physical units, or two or more units may be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0128] 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 this technical solution can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to enable 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 various embodiments of the present application. The aforementioned storage medium includes: USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs and other various media that can store program codes.

[0129] 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 simulation method for impact force on a wheel assembly, characterized in that, The method includes: Constructing a punch rigid body model and 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; Based on the motion constraint conditions of the punch rigid body model, applying an impact force to the wheel assembly simulation model through the punch rigid body model to perform impact force simulation on the wheel assembly simulation model, and obtaining an explicit analysis result of the wheel assembly simulation model; the motion constraint conditions of the punch rigid body model are used to constrain the punch rigid body model to only move in the radial direction of the tire; the explicit analysis result is used to represent the physical response characteristics of the wheel assembly simulation model during the impact force simulation process; Performing implicit analysis on the explicit analysis result to obtain the plastic deformation amount of the inner wheel flange of the wheel.

2. The method according to claim 1, wherein The explicit analysis result at least includes the stable strain result of the inner wheel flange of the wheel.

3. The method according to claim 1, wherein The method further includes: Elastically connecting the wheel mounting disc part of the assembly to the punch rigid body model at a target coordinate point, and setting the connection stiffness of the elastic connection to a preset stiffness; wherein, the target coordinate point is any coordinate point on the impact path.

4. The method according to claim 1, wherein The step of applying 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 to perform impact force simulation on the wheel assembly simulation model and obtaining an explicit analysis result of the wheel assembly simulation model includes: Determining the field output data and history output data of the wheel assembly simulation model during the impact force simulation process; the field output data is used to represent the state data of the wheel assembly simulation model at a preset moment; the history output data is used to represent the data of the state change of the preset position of the wheel assembly simulation model over time; Based on the field output data and the history output data, determining the explicit analysis result.

5. The method according to claim 4, wherein The step of determining the explicit analysis result based on the field output data and the history output data includes: Determining the material parameters of each position of the wheel assembly; the material parameters are used to represent the mechanical behavior of the material under mechanical loads; Based on the material parameters, performing explicit analysis on the field output data and the history output data to obtain the explicit analysis result.

6. The method according to claim 4, characterized in that Before applying 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 to perform impact force simulation on the wheel assembly simulation model, the method further includes: Setting the impact analysis time, field output, and history output during the impact force simulation process.

7. The method according to claim 1, wherein The wheel assembly simulation model is constructed by the following method: 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 constraint relationship, and obtaining an initial wheel assembly simulation model, where the constraint relationship is the constraint relationship between the tire and the wheel hub in the wheel assembly; 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.

8. An impact force simulation device for a wheel assembly, characterized in that, The device includes: a construction unit and a processing unit; The construction unit is configured to construct a punch rigid body model and 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 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 configured to 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 an impact force simulation on the wheel assembly simulation model, and obtain an explicit analysis result of the wheel assembly simulation model; the motion constraint conditions of the punch rigid body model are used to constrain that the punch rigid body model can only move along the radial direction of the tire; the explicit analysis result is used to represent the physical response characteristics of the wheel assembly simulation model during the impact force simulation process; The processing unit is further configured to perform an implicit analysis on the explicit analysis result to obtain the plastic deformation amount of the inner wheel rim of the wheel.

9. The impact force simulation device according to claim 8, wherein The processing unit is further configured to elastically connect the wheel mounting disc part of the assembly to the punch rigid body model at a target coordinate point, and set the connection stiffness of the elastic connection to a preset stiffness; wherein, the target coordinate point is any coordinate point on the impact path.

10. The impact force simulation device according to claim 8, wherein, The processing unit is specifically configured to: Determine the field output data and the history output data of the wheel assembly simulation model during the impact force simulation process; the field output data is used to represent the state data of the wheel assembly simulation model at a preset moment; The history output data is used to represent the data of the state change of the preset position of the wheel assembly simulation model over time; Based on the field output data and the history output data, determine the explicit analysis result.

11. The impact force simulation device according to claim 10, characterized in that, The processing unit is specifically configured to: Determine the material parameters of each position of the wheel assembly; the material parameters are used to represent the mechanical behavior of the material under mechanical loads; Based on the material parameters, perform an explicit analysis on the field output data and the history output data to obtain the explicit analysis result.

12. An electronic device, characterized in that, Includes: A processor; A memory for storing executable instructions of the processor; Wherein, the processor is configured to execute the instructions to implement the method according to any one of claims 1 to 7.

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