A tire impact condition simulation method, device and medium

Abstract

The present invention provides a tire impact condition simulation method, device and medium, which relates to the field of computer technology, including: obtaining a three-dimensional model of a tire to be tested; classifying the calculation units in the three-dimensional model to obtain rubber units and skeleton units; performing a trial run on the three-dimensional model through a trial run command to obtain contact surface data; establishing an impact condition calculation file according to the rubber unit, the skeleton unit and the contact surface data; and running the impact condition calculation file to obtain force change data of the tire to be tested. The technical solution of the embodiment of the present invention can simulate the impact condition and provide rich and accurate data for tire performance testing.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to a tire impact working condition simulation method, device and medium. Background Art

[0002] Tires are the only parts of vehicles such as cars that come into contact with the road. Their quality and performance have a crucial impact on the driving safety and stability of the vehicle. Therefore, when designing and manufacturing tires, tire engineers must consider the complex and harsh working conditions that tires encounter during use.

[0003] For complex working conditions such as impact conditions, it is difficult for tire engineers to collect tire performance data through actual testing due to factors such as lack of testing instruments. Even if a pendulum of a certain weight can be used to impact a test rod at a high speed to measure the energy consumed by the tire from deformation to fracture, the test results cannot accurately reflect the stress characteristics of the tire when it is impacted during driving. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a tire impact condition simulation method, equipment and medium, which can simulate the situation of the tire impacting the road when it encounters steps, uneven road surfaces, etc. during rolling by means of finite element simulation. The force characteristics of the tire when impacted can be simulated and calculated, providing rich data for tire performance testing.

[0005] In a first aspect, an embodiment of the present invention provides a tire impact condition simulation method, comprising:

[0006] Obtaining a three-dimensional model of the tire to be tested;

[0007] Classify the computational units in the three-dimensional model to obtain rubber units and skeleton units;

[0008] The three-dimensional model is tested by the test run command to obtain the contact surface data;

[0009] According to the rubber unit, skeleton unit and contact surface data, the impact condition calculation file is established;

[0010] Run the impact condition calculation file to obtain the force change data of the tire to be tested.

[0011] In a preferred embodiment of the present invention, the above-mentioned obtaining the three-dimensional model of the tire to be tested includes: obtaining the two-dimensional model of the tire to be tested and the material property value;

[0012] By using the rotation command, the two-dimensional model is rotated to form an initial three-dimensional model;

[0013] Dividing the initial three-dimensional model into tire components to obtain at least one tire component;

[0014] According to the material property values, the material properties of each tire component are set to obtain a three-dimensional model of the tire to be tested.

[0015] In a preferred embodiment of the present invention, the impact condition calculation file is established based on the rubber unit, the skeleton unit and the contact surface data, including:

[0016] According to the rubber unit, skeleton unit and contact surface data, the impact condition calculation model is set;

[0017] Through the step attribute command, the step attribute parameters for executing the calculation steps of the impact condition calculation model are set to obtain the impact condition calculation file.

[0018] In a preferred embodiment of the present invention, the impact condition calculation model is set according to the rubber unit, the skeleton unit and the contact surface data, including:

[0019] Import the rubber unit and skeleton unit into the impact condition calculation model, and embed the skeleton unit into the rubber unit through the embed command;

[0020] Import the contact surface data into the impact condition calculation model, and set the contact surface pairs and contact parameters of the contact surfaces through the contact property setting command.

[0021] In a preferred embodiment of the present invention, the above method further comprises:

[0022] Obtaining measured parameters of the tire to be tested; wherein the measured parameters include mass and moment of inertia;

[0023] The measured parameters are input into the impact condition calculation model.

[0024] In a preferred embodiment of the present invention, the step attribute parameters include tire pressure, initial velocity and impact time.

[0025] In a preferred embodiment of the present invention, the contact surface data includes tire inner surface data, rim surface data, road surface data, tire and rim contact surface data, and tire and road surface contact surface data.

[0026] In a preferred embodiment of the present invention, the method further comprises:

[0027] Determine the maximum force value of the tire to be tested according to the force change data of the tire to be tested;

[0028] The maximum force value and the maximum force threshold are compared to determine the impact test result of the tire to be tested.

[0029] In a second aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the tire impact condition simulation method of the first aspect.

[0030] In a third aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the tire impact condition simulation method of the first aspect mentioned above.

[0031] The embodiments of the present invention bring the following beneficial effects:

[0032] An embodiment of the present invention provides a method for simulating tire impact conditions, by obtaining a three-dimensional model of a tire to be tested, dividing the calculation units in the three-dimensional model into rubber units and skeleton units, obtaining a contact surface model by trial running the three-dimensional model, and establishing an impact condition calculation file according to the rubber unit, skeleton unit and contact surface data, thereby obtaining force change data of the tire to be tested by running the impact condition calculation file, thereby realizing the simulation of the impact condition of the tire by the finite element simulation method, solving the problem that the prior art cannot accurately obtain tire performance data under complex conditions, and providing rich and accurate data for tire performance testing.

[0033] Other features and advantages of the present invention will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present invention.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A flowchart of a tire impact condition simulation method provided by an embodiment of the present invention;

[0037] Figure 2 A flowchart of another tire impact condition simulation method provided by an embodiment of the present invention;

[0038] Figure 3 A flowchart of another tire impact condition simulation method provided by an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Tires are the only parts of vehicles such as cars that come into contact with the road. The quality and performance of tires have a crucial impact on the driving safety and stability of the vehicle. Tires are often used under complex and harsh conditions. They are subjected to various deformations, loads, forces, and high and low temperature effects when driving. Therefore, they must have high load-bearing performance, traction performance, and cushioning performance. When designing and manufacturing tires, tire engineers must consider the complex and harsh working conditions of tires when in use. However, due to factors such as the lack of testing instruments, it is difficult for tire engineers to collect data on various performance of tires under harsh working conditions. Even if a pendulum of a certain weight can be used to impact the test rod at a high speed to measure the energy consumed by the tire from deformation to fracture, the test results cannot accurately reflect the force characteristics of the tire when it is impacted during driving.

[0042] In response to this, tire manufacturing engineers have gradually shifted their focus to finite element simulation technology. Currently, the finite element calculations commonly used in the tire industry are mainly to simulate some conventional working conditions, such as inflation, loading, and more complex ones such as acceleration, braking, cornering, and side deviation, but there is a lack of research on more complex working conditions such as impact conditions.

[0043] Based on this, a tire impact condition simulation method provided in an embodiment of the present invention can establish an impact condition calculation file through finite element simulation, and obtain the tire force change data by running the impact condition calculation file, thereby solving the problem that the prior art cannot accurately obtain tire performance data under complex conditions, and providing rich and accurate data for tire performance testing.

[0044] To facilitate understanding of this embodiment, a tire impact condition simulation method disclosed in an embodiment of the present invention is first introduced in detail.

[0045] Example 1

[0046] The embodiment of the present invention provides a tire impact condition simulation method. Figure 1 Flow chart of a tire impact condition simulation method provided by an embodiment of the present invention. Figure 1 As shown, the tire impact condition simulation method may include the following steps:

[0047] Step S101, obtaining a three-dimensional model of a tire to be tested.

[0048] The tire to be tested refers to a tire that needs to be tested under impact conditions. For example, the tire to be tested can be a full steel radial tire of a certain specification. The impact condition refers to the situation where the tire encounters a step or uneven road surface during rolling, and the tire will hit the step or the protruding part on the uneven road surface at a certain speed. The three-dimensional model refers to a model constructed using finite element simulation software to describe the tire to be tested. The three-dimensional model can also describe the rim used to fix the tire to be tested, as well as the road surface or step in the form of the tire.

[0049] Specifically, the pre-built three-dimensional model of the tire to be tested can be imported into the finite element simulation software. The two-dimensional model of the tire to be tested can also be drawn by CAD software and imported into the finite element simulation software, and the three-dimensional model of the tire to be tested is formed by rotating the two-dimensional model. Exemplarily, the finite element simulation software can be ABAQUS software.

[0050] Step S102, classifying the calculation units in the three-dimensional model to obtain rubber units and skeleton units.

[0051] The calculation unit refers to the smallest unit used to form a three-dimensional model, and the calculation unit can be used to calculate the force change data of different parts of the tire under impact conditions. It can be understood that the three-dimensional model of the tire to be tested constructed using finite element simulation software is composed of multiple calculation units. Different materials make up the tire to be tested, and different calculation units are used. For the same material, different positions in the three-dimensional model also use different calculation units. In the present application, the materials constituting the tire include at least rubber materials and skeleton materials. In the simulation software, the calculation unit that can be used to simulate the rubber material can be one or a mixture of C3D6, C3D8, C3D6R and C3D8R, and the calculation unit used to simulate the skeleton material can be a line unit.

[0052] Specifically, the calculation units constituting the three-dimensional model are classified according to different simulated materials. The calculation units used to simulate rubber materials are classified as rubber units, and the calculation units used to calculate skeleton materials are classified as skeleton units.

[0053] Step S103, test-run the three-dimensional model through a test-run command to obtain contact surface data.

[0054] The trial run is used to calculate the three-dimensional model, and the calculation results include at least the contact surface data. The trial run command is used to instruct the finite element simulation software to perform a trial run operation on the three-dimensional model. The contact surface refers to the surface that has a contact relationship between the tire and other objects. It can be understood that in an impact condition, when the tire needs to roll on the road surface, the inner surface of the tire needs to be inflated, and the tire needs to be fixed on the rim. Therefore, the contact surface includes the road surface, the inner surface of the tire, the rim surface, the contact surface between the tire and the rim, and the contact surface between the tire and the road surface. Correspondingly, the contact surface data includes the inner surface data of the tire, the rim surface data, the road surface data, the contact surface data between the tire and the rim, and the contact surface data between the tire and the road surface.

[0055] It can be understood that in the finite element simulation software, the file used to store the three-dimensional model is a file in the inp format. By adding the TRANSPORT, FILE=DYNA-WEDGE command in the inp file, that is, adding a trial run command, the three-dimensional model can be calculated, and the file in the AXI format can be found in the calculation result file. The contact surface data is stored in the AXI format file.

[0056] Step S104, establishing an impact condition calculation file according to the rubber unit, the skeleton unit and the contact surface data.

[0057] The impact condition calculation file is used to set the operation steps of the impact condition. That is, in the impact condition calculation file, the model required for the impact condition simulation is set, and the steps to be taken when the model is running are set. Exemplarily, the models required for the impact condition simulation include the three-dimensional model of the tire to be tested and the road surface model, and the distance between the tire and the road surface needs to be set.

[0058] Specifically, the rubber unit, skeleton unit and contact surface data are imported into the impact condition calculation file, the three-dimensional model of the tire to be tested and the road surface model required for the impact condition are assigned, and in the impact condition calculation file, the operation steps of the impact condition are set through the step attribute command. Exemplarily, the operation steps of the impact condition can be: the first step is to inflate the tire; the second step is that the tire rushes towards the road surface at a certain initial velocity.

[0059] Step S105, running the impact condition calculation file to obtain the force change data of the tire to be tested.

[0060] Force variation data refers to the data of the force variation over time on each calculation unit on the tire to be tested. Specifically, the impact condition calculation file is calculated through the running function in the finite element simulation software to simulate the behavior of the tire rushing towards the road at a certain initial velocity, and the force variation on each calculation unit on the tire is obtained, that is, the force variation data of the tire to be tested.

[0061] The tire impact condition simulation method provided in an embodiment of the present invention obtains a three-dimensional model of the tire to be tested, divides the calculation units in the three-dimensional model into rubber units and skeleton units, obtains a contact surface model by trial running the three-dimensional model, and establishes an impact condition calculation file according to the rubber unit, skeleton unit and contact surface data, thereby obtaining the force change data of the tire to be tested by running the impact condition calculation file, thereby realizing the simulation of the impact condition of the tire by the finite element simulation method, solving the problem that the prior art cannot accurately obtain tire performance data under complex conditions, and providing rich and accurate data for tire performance testing.

[0062] Furthermore, the method also includes: determining a maximum force value of the tire to be tested based on the force change data of the tire to be tested; and comparing the maximum force value with a maximum force threshold to determine an impact test result of the tire to be tested.

[0063] The maximum force value refers to the maximum value in the force change data. The maximum force threshold is used to determine whether the tire to be tested is safe. In the present invention, the maximum force threshold can be determined as the minimum breaking strength of the steel wire. It can be understood that when the tire rushes towards the road surface at a certain initial velocity, the force applied to the tire during the contact with the road surface changes first increases and then decreases. If the maximum force value of the tire is less than the maximum force threshold, it means that the tire will not be damaged during the impact process, and the impact test result is safe. If the maximum force value of the tire is greater than or equal to the maximum force threshold, it means that the tire may be broken and damaged during the impact process, thereby causing economic losses, so the impact test result is dangerous.

[0064] Specifically, from the force change data of the tire to be tested, the force change data of a calculation unit is selected, and generally the force change data of the calculation unit of the tire contacting the road surface is selected, and the data with the largest value is selected from the force change data as the maximum force value of the tire to be tested. The maximum force value is compared with the maximum force threshold value, and if the maximum force value is less than the maximum force threshold value, the impact test result of the tire to be tested is determined to be safe, and if the maximum force value is greater than or equal to the maximum force threshold value, the impact test result of the tire to be tested is determined to be dangerous.

[0065] Exemplarily, the tire to be tested is a 12.00R20 tire. The calculation is performed according to the tire impact condition simulation method provided in the embodiment of the present invention. When assigning the data required for the impact condition, the roadside position is set to 0.4mm below the tire to be tested. In the impact condition calculation file, the operation steps of the impact condition can be set by the step attribute command: the first step is to inflate the tire, and the inflation pressure is 1200kPa; the second step is that the tire rushes to the road surface at a certain initial velocity, the initial velocity is set to 1.8m / s, and the impact process time is set to 1.8s. After the impact condition calculation file is calculated, the calculation results are stored in the ODB file. From the ODB file, the data of the calculation unit S11 used to describe the steel wire of the first belt layer in the skeleton unit is exported as the force change data, and the maximum value in the force change data is determined as the maximum force value of the tire to be tested, that is, 1522MPa. Then the tire construction table is checked, which shows that the minimum breaking strength of the steel wire used in the first belt layer is 2340MPa, that is, the maximum force threshold is 2340MPa. Since the maximum force value is less than the maximum force threshold, it indicates that the steel wire of the first belt layer of the tire will not be damaged during this impact process, that is, the impact test result of the tire to be tested is safe.

[0066] By determining the maximum force value from the force change data of the tire to be tested, and determining the impact test result of the tire to be tested based on the comparison result between the maximum force value and the maximum force threshold, the performance data of the tire to be tested under impact conditions can be obtained and tested, providing reliable data for the study of tire impact conditions.

[0067] Example 2

[0068] The embodiment of the present invention also provides another tire impact condition simulation method; this method is implemented on the basis of the method in the above embodiment; this method focuses on describing the specific implementation method of obtaining the three-dimensional model of the tire to be tested.

[0069] Figure 2 A flowchart of another tire impact condition simulation method provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the tire impact condition simulation method may include the following steps:

[0070] Step S201, obtaining a two-dimensional model and material property values ​​of a tire to be tested.

[0071] The two-dimensional model is used to describe the composition structure of the tire to be tested. Specifically, the composition structure of the tire to be tested can be displayed through the cross section of the tire. It can be understood that the materials used for different composition structures of the tire to be tested can be different or the same. The material attribute values ​​are used to describe the materials used for the composition structure of the tire to be tested. Exemplarily, different materials have different material attributes. The material attributes of rubber materials include modulus, density, Poisson's ratio, etc., and the material attributes of steel wire materials include cross-sectional area, steel wire angle, and steel wire density, etc.

[0072] Specifically, the material diagram of the tire, that is, the cross-sectional diagram of the tire, can be drawn through CAD software. The material diagram contains material property values. Use lines to draw a grid in the CAD software to form a grid diagram, wherein the grids in the grid diagram can be triangles or quadrilaterals. For example, at the edge of the tire cross-sectional diagram, the grid can be a triangle, and inside the tire cross-sectional diagram, that is, at the non-edge, the grid can be a quadrilateral. Save the grid diagram in DXF format and import it into TBABAS pre-processing software. TBABAS pre-processing software converts the grid diagram into an inp format file that can be used by finite element simulation software to form a two-dimensional model of the tire to be tested, wherein the two-dimensional model also contains material property values. The finite element simulation software can obtain the two-dimensional model of the tire to be tested and the material property values ​​from the converted inp format file.

[0073] It can be understood that the grid drawn in the CAD software is presented in the form of calculation units in the finite element simulation software, and one grid can form one calculation unit.

[0074] Step S202: Rotate the two-dimensional model to form an initial three-dimensional model through a rotation command.

[0075] The rotation command is used to rotate the two-dimensional model. Specifically, in the finite element simulation software, the *SYMMETRIC MODEL GENERATION, REVOLVE command is used to rotate the two-dimensional model to form an initial three-dimensional model.

[0076] Step S203, dividing the initial three-dimensional model into tire components to obtain at least one tire component.

[0077] According to the composition structure of the tire, the initial three-dimensional model is divided into tire components. Specifically, the tire components include tread, base rubber, cushion rubber, belt layer, carcass, sidewall, inner liner, lower triangle, upper triangle, ladle, wire ring, wire ring rubber and bead protection rubber. The composition structure of the tire can be displayed by a two-dimensional model, that is, the two-dimensional model includes the composition structure data for describing the tire components, that is, the tire components to which each grid belongs are specified. It can be understood that since the grid of the two-dimensional model corresponds to the calculation unit of the three-dimensional model, according to the composition structure data used to describe the tire components in the two-dimensional model, the calculation units in the initial three-dimensional model can be divided. The division is based on the composition structure of the tire, and the calculation units belonging to the same tire component are classified as one category to describe the tire component.

[0078] Step S204, setting the material properties of each tire component according to the material property values, and obtaining a three-dimensional model of the tire to be tested.

[0079] Specifically, for each tire component, according to the material used in the tire component, the corresponding data is obtained from the material attribute value, and the material attribute of the tire component is assigned to form a three-dimensional model of the tire to be tested. For example, for the tread, the material used is rubber, and the modulus, density and Poisson's ratio of the rubber material are obtained from the material attribute value, and the material attribute of the tread is assigned; for the bead ring, the material used is steel wire, and the modulus, steel wire cross-sectional area, steel wire angle and steel wire density of the steel wire material are obtained from the material attribute value, and the material attribute of the steel wire ring is assigned.

[0080] In a preferred embodiment, taking a certain specification of all-steel radial tire as an example, CAD is used to draw a tire material diagram. Lines are used to draw grids in CAD. The grids can be triangles or quadrilaterals, and the grid size is generally 3-6 mm. The grid diagram is saved in DXF format, and then imported into TYABAS pre-processing software to export the inp format file of the two-dimensional tire model. Then, the *SYMMETRIC MODEL GENERATION, REVOLVE command is used to rotate the two-dimensional tire model into a three-dimensional model, and the tire components are divided, the material properties are set and allocated, etc., wherein the rubber unit type is set to one or a mixture of C3D6, C3D8, C3D6R, C3D8R, and the skeleton material uses line units, and the type is set to sfmgax1.

[0081] Step S205, classifying the calculation units in the three-dimensional model to obtain rubber units and skeleton units.

[0082] Step S206, test-run the three-dimensional model through a test-run command to obtain contact surface data.

[0083] Step S207, establishing an impact condition calculation file according to the rubber unit, skeleton unit and contact surface data.

[0084] Step S208, running the impact condition calculation file to obtain the force change data of the tire to be tested.

[0085] The tire impact condition simulation method provided in an embodiment of the present invention forms an initial unit model by rotating a two-dimensional model. After dividing the initial three-dimensional model into components, the material properties of the tire components are set using material property values, thereby achieving accurate assignment of material properties of each tire component and providing a data basis for subsequent impact condition simulation.

[0086] Example 3

[0087] An embodiment of the present invention also provides another tire impact condition simulation method; this method is implemented on the basis of the above-mentioned embodiment method; this method focuses on describing the specific implementation method of establishing an impact condition calculation file based on rubber units, skeleton units and contact surface data.

[0088] Figure 3 A flowchart of another tire impact condition simulation method provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the tire impact condition simulation method may include the following steps:

[0089] Step S301, obtaining a three-dimensional model of the tire to be tested.

[0090] Step S302, classifying the calculation units in the three-dimensional model to obtain rubber units and skeleton units.

[0091] Step S303, test-run the three-dimensional model through a test-run command to obtain contact surface data.

[0092] Step S304, setting an impact condition calculation model according to the rubber unit, skeleton unit and contact surface data.

[0093] The impact condition calculation model refers to the model involved in the impact condition, including the three-dimensional model of the tire to be tested and the road surface model. Specifically, create an impact condition calculation file in the finite element simulation software. At this time, the impact condition calculation file is a blank file. Import the rubber unit and the skeleton unit into the impact condition calculation file, set the three-dimensional model of the tire to be tested, import the contact surface data into the impact condition calculation file, set the road surface model and the part with contact relationship between the three-dimensional model of the tire to be tested and the road surface model. The set three-dimensional model of the tire to be tested and the road surface model are used as the impact condition calculation model to execute the calculation steps of the impact condition calculation model.

[0094] Specifically, the impact condition calculation model can be set through step A1-step A2.

[0095] Step A1, importing the rubber unit and the skeleton unit into the impact condition calculation model, and embedding the skeleton unit into the rubber unit through the embedding command.

[0096] The embed command is used to combine calculation units used to describe different materials. It is understandable that in the tire manufacturing process, rubber material is the main material of the tire. In order to ensure the support of the tire, it is necessary to embed steel wire material in the rubber material to improve the support performance of the rubber material. Therefore, in the finite element simulation software, it is necessary to use the embed command to embed the calculation unit describing the steel wire material, that is, the skeleton unit, into the calculation unit describing the rubber material, that is, the rubber unit, so as to ensure the consistency of the impact condition calculation model established by the simulation software with the actual tire, thereby ensuring the accuracy of the simulation.

[0097] The rubber unit and the skeleton unit are imported into the impact condition calculation model through the calculation unit import command, that is, the *IMPORT command. The skeleton unit is embedded into the corresponding rubber unit through the embedding command, that is, the *Embedded Element command, that is, the skeleton unit and the rubber unit are used to construct a three-dimensional model of the tire to be tested according to the structure of the tire to be tested.

[0098] Step A2, importing the contact surface data into the impact condition calculation model, and setting the contact surface pair and the contact parameters of the contact surface pair through the contact property setting command.

[0099] The contact attribute setting command is used for the attributes of the contact surface. In the present invention, the contact surface data is used to describe the contact surface. Specifically, the contact surface includes the road surface, the inner surface of the tire, the rim surface, the contact surface between the tire and the rim, and the contact surface between the tire and the road surface. A contact surface pair refers to two contact surfaces that have a contact relationship. It can be understood that the contact surface pair includes the road surface and the contact surface between the tire and the road surface, and the rim and the contact surface between the tire and the rim. Contact parameters are used to describe the relationship and attributes between the contact surface pairs, including the friction coefficient and the positional relationship data between the road surface and the tire. Exemplarily, the friction coefficient in the contact parameters can be set to any value between 0.3-1.2, and the positional relationship data between the road surface and the tire can be set to any value of the road surface position at 0.3mm-0.8mm below the tire.

[0100] Specifically, the contact surface data is imported into the impact condition calculation model through the data import command, that is, the *INCLUDE command, and the contact surface between the road surface and the tire, and the contact surface between the rim and the tire are set as two contact surfaces through the contact property setting command, that is, the *Contact command, and the contact parameters of the contact surfaces are assigned.

[0101] Furthermore, it also includes: obtaining measured parameters of the tire to be tested; wherein the measured parameters include mass and moment of inertia; and inputting the measured parameters into the impact condition calculation model.

[0102] The measured parameters refer to the parameters of the impact condition calculation model that can be obtained through actual measurement. The measured parameters include at least mass and moment of inertia, and may further include the mass of the tire to be tested and the moment of inertia of the tire to be tested, the mass of the rim and the moment of inertia of the rim. Specifically, the measured parameters of the tire to be tested can be obtained by setting sensors on the tire to be tested and the rim used to fix the tire to be tested. The test parameters are input into the impact condition calculation model through the data import command.

[0103] By inputting the measured parameters into the impact condition calculation model, the parameters in the impact condition calculation model can be enriched and made more consistent with actual tests, thereby improving the accuracy of the impact condition calculation model and thus improving the accuracy of the force change data of the tire to be tested.

[0104] Step S305, setting the step attribute parameters of the calculation steps of the impact condition calculation model through the step attribute command, and obtaining the impact condition calculation file.

[0105] The calculation steps of the impact condition calculation model are used to describe the steps that need to be executed when performing an impact condition test on a tire. The calculation steps of the impact condition calculation model can be set according to actual conditions. Exemplarily, the calculation steps of the impact condition calculation model can be divided into: the first step is to inflate the tire; the second step is that the tire rushes towards the road surface at a certain initial velocity. The step attribute parameters refer to the parameters that need to be set in the calculation steps of the impact condition calculation model. Exemplarily, the step attribute parameters include tire pressure, initial velocity and impact time. The step attribute command is used to copy the step attribute parameters.

[0106] Specifically, through the step attribute command, that is, the *DYNAMIC,EXPLICIT command, the step attribute parameters of the calculation step of the impact condition calculation model are assigned. The specific assigned values ​​can be set according to the actual situation to complete the establishment of the impact condition calculation file.

[0107] Step S306, running the impact condition calculation file to obtain the force change data of the tire to be tested.

[0108] In a preferred embodiment, taking a certain specification of all-steel radial tire as an example, the inp format file of the three-dimensional model of the tire to be tested is imported into the ABAQUS software. A new unit set named ALL-RUBBER is created, and all rubber units are assigned to it. A new unit set named ALL-REBAR is created, and all skeleton material units are assigned to it. Add the TRANSPORT, FILE=DYNA-WEDGE command in the inp file, and then start the calculation. Find the file in the AXI format in the result file of the calculation, open it, query and copy all the contents under the *SURFACE entry, that is, the contact surface data. Create a file named SURFACE in the folder of the calculation results, and paste the contact surface data into it. Create a calculation file for the tire impact road surface in the ABAQUS software, named CHONGJI.INP, and put it in the same calculation folder. Use the *IMPORT command to import the rubber unit and skeleton unit in ALL-RUBBER and ALL-REBAR into the calculation file of the tire impact road surface, and use the *Embedded Element command to embed all skeleton units into the corresponding rubber units. Use *INCLUDE command to import SURFACE file, which includes tire inner surface INSIDESURF, road surface SROAD, rim surface RIGIDRIM, tire contact surface RIMC, tire contact surface TREADSURF. Use *Contact command to set two contact surfaces SROAD-TREADSURF and RIGIDRIM-RIMC, and set the friction coefficient to 0.3-1.2. The road surface is 0.3mm-0.8mm below the tire. Set the mass and moment of inertia of the tire and rim according to the measured data. Use *DYNAMIC,EXPLICIT to establish the simulation steps of the tire impacting the road surface. The first step is to inflate the tire, and the air pressure is set to 1.4-2 times the standard tire pressure. The second step is that the tire rushes to the road surface with a certain initial velocity, the initial velocity is set to 1.2m / s-2.4m / s, and the impact process time is set to 0.8s-1.5s. After the simulation calculation is completed, open the ODB file and export the various states of the tire and the stress and strain it is subjected to during the impact process in RESULT-XYData, that is, the force change data of the tire to be tested.

[0109] The tire impact condition simulation method provided in an embodiment of the present invention obtains a three-dimensional model of the tire to be tested, divides the calculation units in the three-dimensional model into rubber units and skeleton units, obtains a contact surface model by trial running the three-dimensional model, and establishes an impact condition calculation file according to the rubber unit, skeleton unit and contact surface data, thereby obtaining the force change data of the tire to be tested by running the impact condition calculation file, thereby realizing the simulation of the impact condition of the tire by the finite element simulation method, solving the problem that the prior art cannot accurately obtain tire performance data under complex conditions, and providing rich and accurate data for tire performance testing.

[0110] Example 4

[0111] The embodiment of the present invention also provides an electronic device for running the above tire impact working condition simulation method; see Figure 4 A structural schematic diagram of an electronic device is shown, the electronic device includes a memory 400 and a processor 401, wherein the memory 400 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor 401 to implement the above-mentioned tire impact condition simulation method.

[0112] Further, Figure 4 The electronic device shown further includes a bus 402 and a communication interface 403 , and the processor 401 , the communication interface 403 and the memory 400 are connected via the bus 402 .

[0113] The memory 400 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 403 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 402 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0114] The processor 401 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 401. The above processor 401 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 400, and the processor 401 reads the information in the memory 400 and completes the steps of the method of the above embodiment in combination with its hardware.

[0115] An embodiment of the present invention also provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the above-mentioned tire impact condition simulation method. The specific implementation can be found in the method embodiment, which will not be repeated here.

[0116] The computer program product for the tire impact condition simulation method provided in the embodiment of the present invention includes a computer-readable storage medium storing a non-volatile program code executable by a processor. The instructions included in the program code can be used to execute the method described in the previous method embodiment. The specific implementation can be found in the method embodiment and will not be repeated here.

[0117] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0118] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0119] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0120] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0121] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that can be executed by a processor. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., various media that can store program codes.

[0122] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A tire impact condition simulation method, characterized in that: include: Obtaining a three-dimensional model of the tire to be tested; Classify the computational units in the three-dimensional model to obtain rubber units and skeleton units; Performing a test run on the three-dimensional model through a test run command to obtain contact surface data; Setting an impact condition calculation model according to the rubber unit, the skeleton unit and the contact surface data; By means of a step attribute command, a step attribute parameter for executing a calculation step of an impact condition calculation model is set to obtain an impact condition calculation file; wherein the impact condition calculation file is used to set the operation steps of the impact condition; The impact condition calculation file is run to obtain the force change data of the tire to be tested.

2. The method according to claim 1, characterized in that The step of obtaining the three-dimensional model of the tire to be tested comprises: Obtain the two-dimensional model and material property values ​​of the tire to be tested; By means of a rotation command, the two-dimensional model is rotated to form an initial three-dimensional model; Dividing the initial three-dimensional model into tire components to obtain at least one tire component; The material properties of the tire components are set according to the material property values ​​to obtain a three-dimensional model of the tire to be tested.

3. The method according to claim 1, characterized in that The step of setting an impact condition calculation model according to the rubber unit, the skeleton unit and the contact surface data comprises: Importing the rubber unit and the skeleton unit into the impact condition calculation model, and embedding the skeleton unit into the rubber unit through an embedding command; The contact surface data is imported into the impact condition calculation model, and the contact surface pair and the contact parameters of the contact surface pair are set through the contact property setting command.

4. The method according to claim 3, characterized in that: Also includes: Obtaining measured parameters of the tire to be tested; wherein the measured parameters include mass and moment of inertia; The measured parameters are input into the impact condition calculation model.

5. The method according to claim 1, characterized in that The step attribute parameters include tire pressure, initial velocity and impact time.

6. The method according to claim 1, characterized in that The contact surface data includes tire inner surface data, rim surface data, road surface data, tire and rim contact surface data, and tire and road surface contact surface data.

7. The method according to claim 1, characterized in that Also includes: Determining the maximum force value of the tire to be tested according to the force change data of the tire to be tested; The maximum force value is compared with the maximum force threshold value to determine the impact test result of the tire to be tested.

8. An electronic device, characterized in that: It comprises a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the tire impact condition simulation method according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are called and executed by the processor, the computer-executable instructions prompt the processor to implement the tire impact condition simulation method according to any one of claims 1 to 7.

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