Tire three-dimensional model generation method and device

Abstract

The invention discloses a tire three-dimensional model generation method and device. The method comprises the following steps: acquiring specification parameters of a tire, and acquiring a plurality of grids in a two-dimensional section model of the tire; determining a first position angle of a long axis of a grounding mark of the tire in the circumferential direction of the tire according to the specification parameters when the tire is in contact with the ground, and determining a grid rotation rule corresponding to the first position angle; determining a rotation rule corresponding to each grid according to a grid rotation rule and the angle range of each grid; and rotating each grid according to a corresponding rotation rule to obtain a three-dimensional model of the tire. The technical problem that the stability and convergence of the finally generated three-dimensional model are poor due to the fact that the rotation part number of the position angle where the grid of the grounding area of the two-dimensional section model cannot be reasonably set in the related technology is solved.

Description

Technical Field

[0001] The present application relates to the technical field of tire simulation, and in particular to a method and device for generating a three-dimensional tire model. Background Art

[0002] With the rapid development of computer hardware and software technology, Computer Aided Design (CAD) and Computer Aided Engineering (CAE) have been widely used in the tire industry. As the only component that interacts between the car and the road, the tire's ground contact footprint is the most intuitive reflection of the tire's ground contact performance. With the deepening of research, tire design and development personnel have higher and higher requirements for the accuracy of tire footprint simulation, and at the same time, they have also put forward new requirements for the efficiency of footprint simulation.

[0003] Nowadays, the commonly used approach to building tire simulation models includes the following steps: first, mesh the two-dimensional material distribution map to obtain a two-dimensional axisymmetric model; then, rotate the two-dimensional axisymmetric model through the module provided by the commercial software to generate a three-dimensional tire model.

[0004] However, different commercial software defines different rotations for different areas, such as using a coarse grid in areas far from the ground, and a fine grid in the tire ground contact area. Due to the different definitions of the ground contact area, and the higher computing resource usage of the three-dimensional grid than the two-dimensional grid, if the angle covered by the fine grid in the ground contact area is set too large, the calculation time will increase significantly, which is not conducive to a large number of scheme screening in the early stages of design. However, if you choose to sacrifice some accuracy and use a coarse grid to rotate the two-dimensional grid in the ground contact area, it will make the model difficult to converge.

[0005] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0006] The embodiments of the present application provide a method and device for generating a three-dimensional tire model, so as to at least solve the technical problem that the related technology cannot reasonably set the number of rotations of the position angle of the grid in the ground contact area of ​​the two-dimensional cross-sectional model, resulting in poor stability and convergence of the finally generated three-dimensional model.

[0007] According to one aspect of an embodiment of the present application, a method for generating a three-dimensional tire model is provided, comprising: obtaining specification parameters of the tire, and obtaining multiple grids in a two-dimensional cross-sectional model of the tire; determining a first position angle of a major axis of a contact patch of the tire in the circumferential direction of the tire when the tire contacts the ground based on the specification parameters, and determining a grid rotation rule corresponding to the first position angle, wherein the grid rotation rule includes a correspondence between multiple angle ranges and the rotation rule; determining a rotation rule corresponding to each grid according to the grid rotation rule and the angle range in which each grid is located; and rotating each grid according to the corresponding rotation rule to obtain a three-dimensional model of the tire.

[0008] Optionally, multiple grids within the two-dimensional cross-sectional model of the tire are obtained, including: obtaining a material distribution map of the tire, wherein the material distribution map is used to reflect the size and material distribution of the cross-section from the centerline of the tire tread to the sidewall; calling a preset finite element analysis software to grid the tire according to the material distribution map of the tire to obtain a two-dimensional cross-sectional model containing multiple grids.

[0009] Optionally, the load radius of the tire is calculated according to specification parameters, wherein the specification parameters include at least one of the following: rim diameter, outer diameter after inflation, and section height coefficient; the first position angle is calculated according to the load radius of the tire and the following formula: Where α represents the first position angle, R L represents the loaded radius, D represents the outer diameter after inflation, and arccos(·) represents the inverse cosine function.

[0010] Optionally, calculating the load radius of the tire according to the specification parameters includes: calculating the load radius of the tire according to the specification parameters and the following formula: Where R L Indicates the load radius, D r Indicates the rim diameter, D indicates the outer diameter after inflation, F R Represents the section height coefficient.

[0011] Optionally, the rotation rule at least includes: the number of unit angle rotations, and the multiple corresponding relationships in the grid rotation rule include: when the angle range is the first angle range, the corresponding number of unit angle rotations is the first unit angle rotation number, wherein the lower limit of the first angle range is 0°, and the upper limit is the second angle obtained by subtracting the first angle from the first position angle; when the angle range is the second angle range, the corresponding number of unit angle rotations is the second unit angle rotation number, wherein the lower limit of the second angle range is the second angle, and the upper limit is the fourth angle obtained by subtracting the third angle from the first position angle, and the first angle is greater than the third angle; when the angle range is the third angle range, the corresponding unit angle rotation The number of copies is the number of copies rotated by the third unit angle, wherein the lower limit of the third angle range is the fourth angle, and the upper limit is the fifth angle obtained by adding the first position angle to the third angle, and the third unit angle rotation number is the preset minimum unit angle rotation number; when the angle range is the fourth angle range, the corresponding unit angle rotation number is the fourth unit angle rotation number, wherein the lower limit of the fourth angle range is the fifth angle, and the upper limit is the seventh angle obtained by adding the first position angle to the sixth angle, and the sixth angle is greater than the first angle; when the angle range is the fifth angle range, the corresponding unit angle rotation number is the fifth unit angle rotation number, wherein the lower limit of the fifth angle range is the seventh angle, and the upper limit is 180°.

[0012] Optionally, the rotation rules of each grid are determined according to the grid rotation rules and the angle range of each grid, including: for each grid, determining the second position angle of the grid in the two-dimensional cross-sectional model, determining the angle range of the second position angle, and determining the rotation rule corresponding to the angle range from the grid rotation rules.

[0013] Optionally, each grid is rotated according to a corresponding rotation rule to obtain a three-dimensional model of the tire, including: taking the central axis of the tire as the rotation axis, each grid is rotated according to a corresponding rotation rule to obtain a three-dimensional model of the tire, to obtain a three-dimensional model of the tire.

[0014] According to another aspect of an embodiment of the present application, a tire three-dimensional model generating device is also provided, including: an acquisition module, used to obtain specification parameters of the tire, and obtain multiple grids in a two-dimensional cross-sectional model of the tire; a first determination module, used to determine a first position angle of the major axis of the tire's contact footprint in the tire circumferential direction when the tire contacts the ground based on the specification parameters, and determine a grid rotation rule corresponding to the first position angle, wherein the grid rotation rule includes a correspondence between multiple angle ranges and the rotation rule; a second determination module, used to determine the rotation rule of each grid according to the grid rotation rule and the angle range in which each grid is located; and a model generation module, used to rotate each grid according to the corresponding rotation rule to obtain a three-dimensional model of the tire.

[0015] According to another aspect of an embodiment of the present application, a non-volatile storage medium is further provided, the non-volatile storage medium including a stored computer program, wherein the device where the non-volatile storage medium is located executes the above-mentioned tire three-dimensional model generation method by running the computer program.

[0016] According to another aspect of an embodiment of the present application, a computer program product is further provided. The computer program product includes a stored computer program, wherein when the computer program is executed by a processor, the above-mentioned tire three-dimensional model generating method is implemented.

[0017] In the embodiment of the present application, the specification parameters of the tire are obtained, and multiple grids in the two-dimensional cross-sectional model of the tire are obtained; the first position angle of the long axis of the tire's ground contact footprint in the tire circumferential direction is determined according to the specification parameters when the tire contacts the ground, and the grid rotation rule corresponding to the first position angle is determined, wherein the grid rotation rule includes the correspondence between multiple angle ranges and the rotation rule; the rotation rules corresponding to each grid are determined according to the grid rotation rule and the angle range of each grid; each grid is rotated according to the corresponding rotation rule to obtain a three-dimensional model of the tire. This solves the technical problem that the related technology cannot reasonably set the number of rotations of the position angle of the grid in the ground contact area of ​​the two-dimensional cross-sectional model, resulting in poor stability and convergence of the finally generated three-dimensional model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 It is a hardware structure block diagram of an optional computer terminal (or mobile device) for implementing a tire three-dimensional model generation method according to an embodiment of the present application;

[0020] Figure 2 is a schematic flow chart of an optional method for generating a three-dimensional tire model according to an embodiment of the present application;

[0021] Figure 3 is a schematic diagram of optional tire specification parameters according to an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of an optional three-dimensional cross-sectional model according to an embodiment of the present application;

[0023] Figure 5 is a schematic diagram of an optional three-dimensional tire model according to an embodiment of the present application;

[0024] Figure 6 It is a schematic diagram of a tire three-dimensional model of the related art;

[0025] Figure 7 It is a comparative schematic diagram of an optional imprint simulation cloud map of a three-dimensional model according to an embodiment of the present application;

[0026] Figure 8 is a schematic structural diagram of an optional tire three-dimensional model generating device according to an embodiment of the present application;

[0027] Fig. 9 It is a schematic diagram of the structure of an optional electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0029] 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 are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] In addition, the relevant information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. For example, an interface is set up between this system and the relevant user or organization. Before obtaining relevant information, it is necessary to send an acquisition request to the aforementioned user or organization through the interface, and obtain relevant information after receiving the consent information fed back by the aforementioned user or organization.

[0031] Example 1

[0032] According to an embodiment of the present application, a method embodiment of a method for generating a three-dimensional tire model is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0033] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Figure 1 The hardware structure block diagram of a computer terminal (or mobile device) for implementing a tire three-dimensional model generation method is shown. Figure 1 As shown, the computer terminal 10 (or mobile device 10) may include one or more (102a, 102b, ..., 102n are used to illustrate) processors 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data, and a transmission device 106 for communication functions. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0034] It should be noted that the one or more processors 102 and / or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuits may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuit may be a single independent processing module, or may be incorporated in whole or in part into any of the other components in the computer terminal 10 (or mobile device). As described in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0035] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the tire three-dimensional model generation method in the embodiment of the present application. The processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, the tire three-dimensional model generation method of the above-mentioned application is realized. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the computer terminal 10 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0036] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the computer terminal 10. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0037] The display may be, for example, a touch screen liquid crystal display (LCD) that enables a user to interact with a user interface of the computer terminal 10 (or mobile device).

[0038] In the above operating environment, Figure 2 is a flow chart of an optional method for generating a three-dimensional tire model according to an embodiment of the present application, such as Figure 2 As shown, the method at least includes steps S202-S208, wherein:

[0039] Step S202, obtaining specification parameters of the tire, and obtaining a plurality of grids in the two-dimensional cross-sectional model of the tire.

[0040] In the technical solution provided in step S202, since the tire is a structure with rotational symmetry, that is, the geometric shape and material distribution of the tire are symmetrical along its axial direction, the two-dimensional cross-sectional model is obtained by modeling a cross-section of the tire (usually the cross-section from the tread centerline to the sidewall) to use the information of the cross-section to reflect the entire tire, that is, in the two-dimensional cross-sectional model, the cross-section of the tire will be divided into many finite element grids, each grid having specific material properties and geometric shapes.

[0041] Step S204, determining a first position angle of a major axis of a contact patch of the tire in the tire circumferential direction when the tire contacts the ground according to the specification parameters, and determining a grid rotation rule corresponding to the first position angle.

[0042] In the technical solution provided in step S204, the contact patch generated when the tire contacts the ground is an important aspect of tire performance analysis. Therefore, the first position angle of the major axis of the contact patch in the tire circumferential direction can reflect the specific situation of the tire contacting the ground during driving, including the contact area, pressure distribution, etc., which has an important impact on the subsequent analysis of the tire performance. Then, the corresponding grid rotation rule is determined according to the first position angle and the preset rule, wherein the grid rotation rule includes a correspondence between multiple angle ranges and area types, and the angle range is set based on the position angle, and the lower limit of the angle range is 0° and the upper limit is 180°.

[0043] Step S206, determining the rotation rules corresponding to each grid according to the grid rotation rule and the angle range of each grid.

[0044] In the technical solution provided in step S206, since each grid in the two-dimensional cross-sectional model is in a corresponding angle range, and the grid rotation rule defines the correspondence between multiple angle ranges and rotation rules, the grid rotation rule and the angle range of each grid can be used to determine the rotation rule corresponding to each grid.

[0045] Step S208: rotating each grid according to a corresponding rotation rule to obtain a three-dimensional model of the tire.

[0046] In the technical solution provided in step S208, for each mesh, the mesh is rotated according to a rotation rule corresponding to the mesh to obtain an encrypted three-dimensional finite element model.

[0047] The above method of this embodiment is further introduced below.

[0048] As an optional implementation, in the technical solution provided in the above step S202, the method may include:

[0049] Step S2021, obtaining a material distribution map of the tire.

[0050] The material distribution diagram can be drawn by AutoCAD software, and the material distribution diagram can reflect the size and material distribution on the cross section from the tire tread centerline to the tire sidewall.

[0051] Step S2022, calling the preset finite element analysis software, meshing the tire according to the material distribution diagram of the tire, and obtaining a two-dimensional cross-sectional model including multiple meshes.

[0052] The shape of the above-mentioned grid can be a quadrilateral or a triangle, and all grids are axisymmetric. The size of the grid will affect the calculation efficiency and convergence. Therefore, the size of the grid for different parts of the tire is different. The size of the grid in the tread part is one-fourth to one-third of the longitudinal groove depth to ensure that the rigidity of the tread is moderate and that the imprint simulation can be carried out under different load conditions. The entire tread area has a grid state that takes both accuracy and efficiency into consideration; the grid size of other parts can be consistent with the tread grid size or slightly adjusted. For example, the size of the grid in the sidewall part can be adjusted to half of the sidewall thickness, and the size of the grid in the bead part can be adjusted to one-third of the side length of the wire ring. The above-mentioned grid size setting method can help improve the calculation efficiency while ensuring the calculation accuracy.

[0053] As an optional implementation, in the technical solution provided in the above step S204, the method may include:

[0054] Step S2041, calculating the load radius of the tire according to the specification parameters.

[0055] The above-mentioned specification parameters include at least one of the following: rim diameter, inflated outer diameter, and section height coefficient. The section height coefficient is used to characterize the section height value of the tire. For PCR (Passenger Car Radial Tire, passenger car radial) tires, the section height coefficient of ordinary tires is 0.78, and the section height coefficient of type A tires and temporary spare tires is 0.75. For TBR (Truck and Bus Radial Tire, radial for trucks and buses) tires, the section height coefficients of different types and series of TBR tires are different. For details, please refer to the ETRTOEDI manual. For example, the section height coefficient of a truck tire equipped with a 15° deep groove rim and a tire series of 75 series and above is 0.85; the section height coefficient of the same tire but the tire series is 70 series is 0.825; the section height coefficient of the same tire but the tire series is 65 series and below is 0.84. In addition, the section height coefficient of truck tires equipped with 5° deep groove rims and tire series 50 series and above is 0.8; the section height coefficient of the same type of tires but miniature series is 0.85.

[0056] Step S2042, calculating the first position angle according to the load radius of the tire and the following formula:

[0057]

[0058] Where α represents the first position angle, R L represents the load radius, D represents the outer diameter after inflation, arccos(·) represents the inverse cosine function, and the specific meanings of the parameters involved in the above formula can be referred to Figure 3 .

[0059] It should be noted that if α calculated by the above formula is a decimal, the integer obtained by rounding up is used as the position angle of the major axis of the tire contact patch in the tire circumferential direction when the tire contacts the ground.

[0060] Optionally, the technical solution provided in the above step S2041 can calculate the load radius of the tire according to the specification parameters and the following formula:

[0061]

[0062] Where R L Indicates the load radius, D r Indicates the rim diameter, D indicates the outer diameter after inflation, F R Represents the section height coefficient.

[0063] Optionally, the technical solution provided in step S2041 above can also calculate the load radius of the tire in the following manner:

[0064]

[0065] Where Δd represents the amount of tire sinking, and D represents the outer diameter after inflation.

[0066] Alternatively, calculate the tire's load radius as follows:

[0067]

[0068] Where Δd represents the amount of tire sinking, S R Indicates the radial stiffness of the tire.

[0069] It should be noted that the above Δd, S R The calculation methods are all prior art, so the calculation process is not described in detail in the embodiments of the present application.

[0070] As an optional implementation, in the technical solution provided in the above step S204, the multiple corresponding relationships in the grid rotation rule include:

[0071] When the angle range is the first angle range, the corresponding area type is the first area (also called the "ground end area"), and the corresponding unit angle rotation number is the first unit angle rotation number, wherein the lower limit of the first angle range is 0°, and the upper limit is the second angle obtained by subtracting the first angle from the position angle;

[0072] When the angle range is the second angle range, the corresponding area type is also the first area (also called the "ground end area"), and the corresponding unit angle rotation number is the second unit angle rotation number, wherein the lower limit of the second angle range is the second angle, the upper limit is the fourth angle obtained by subtracting the third angle from the position angle, and the first angle is greater than the third angle

[0073] When the angle range is the third angle range, the corresponding area type is the second area (also called the "encrypted area"), and the corresponding unit angle rotation number is the third unit angle rotation number, wherein the lower limit of the third angle range is the fourth angle, the upper limit is the fifth angle obtained by adding the position angle to the third angle, and the third unit angle rotation number is the preset minimum unit angle rotation number;

[0074] When the angle range is the fourth angle range, the corresponding area type is the third area (also called the "gradient area"), and the corresponding unit angle rotation number is the fourth unit angle rotation number, wherein the lower limit of the fourth angle range is the fifth angle, and the upper limit is the seventh angle obtained by adding the position angle to the sixth angle, and the sixth angle is greater than the first angle;

[0075] When the angle range is the fifth angle range, the corresponding area type is the fourth area (also known as the "area away from the ground end"), and the corresponding unit angle rotation number is the fifth unit angle rotation number, where the lower limit of the fifth angle range is the seventh angle and the upper limit is 180°.

[0076] The above rotation rules include: the number of rotations per unit angle and the total number of rotations.

[0077] Therefore, if the position angle is recorded as α, the first angle is 7°, the third angle is 5°, and the sixth angle is 50°, the minimum unit angle rotation number is set to β (unit ° / unit), the first unit angle rotation number is 2; the second unit angle rotation number is 1; the third unit angle rotation number is β; the fourth unit angle rotation number is any value between 1 and 9, such as 5; the fifth unit angle rotation number is 10. Therefore, the grid selection rule corresponding to the calculated angle α in the embodiment of the present application can be defined as shown in Table 1 below.

[0078] The four types of areas corresponding to different angle ranges can be represented by the following Table 1.

[0079] Table 1

[0080]

[0081] It should be noted that the settings of the first angle, the third angle, the sixth angle, the first unit angle rotation number, the second unit angle rotation number, the third unit angle rotation number, the fourth unit angle rotation number and the fifth unit angle rotation number in the above Table 1 are only for example description, and they can be set by themselves according to the actual application scenario, and there is no specific restriction on this.

[0082] As an optional implementation, in the technical solution provided in the above step S206, the method may further include:

[0083] For each mesh, a second position angle of the mesh in the two-dimensional cross-sectional model is determined, and an angle range of the second position angle is determined, and a rotation rule corresponding to the angle range is determined from the mesh rotation rule.

[0084] In the above embodiment, since the second position angles of different grids in the two-dimensional section model are different, the angle range of the second position angle of each grid in the two-dimensional section model can be matched with the five angle ranges defined in the grid rotation rule, and the rotation rule corresponding to the successfully matched angle range can be used as the rotation rule of the grid.

[0085] As an optional implementation, in the technical solution provided in the above step S208, since the above two-dimensional cross-sectional model is a partial cross-section of the tire, in order to obtain a complete three-dimensional finite element model of the tire, the embodiment of the present application proposes that each grid in the two-dimensional model can be encrypted according to the following method to obtain the final three-dimensional finite element model, including:

[0086] Taking the central axis of the tire as the rotation axis, each grid is rotated according to the corresponding rotation rule to obtain a three-dimensional model of the tire.

[0087] Specifically, the rotation command in the finite element software is called to rotate each mesh 360° around the rotation axis according to the rotation rule of the corresponding area, so as to copy the two-dimensional cross-sectional model along the circumference of the tire and generate an encrypted three-dimensional finite element model.

[0088] Furthermore, the method proposed in the embodiment of the present application will be briefly described below by generating a three-dimensional finite element model of a load-bearing tire 12R22.5.

[0089] Step 1: Use pre-processing software to mesh the material distribution map of the tire and obtain a two-dimensional cross-sectional model of the tire, such as Figure 4 Among them, the longitudinal groove depth of the tire of this specification is 16mm, so the grid size used in the tread area is set according to one-fourth of the longitudinal groove depth, that is, the grid size of the tread area is 4mm.

[0090] Step 2: Calculate the tire's load radius R based on the tire's specification parameters L The rim diameter D of the tire is 513.15 mm. r The outer diameter D after inflation is 1089mm, and the section height coefficient F r is 0.85.

[0091] Step 3: According to the load radius R L When the tire is in contact with the ground, the position angle α of the major axis of the tire contact patch in the tire circumferential direction is approximately 19.53°, rounded up to 20°.

[0092] Step 4: According to the above position angle α, the corresponding grid rotation rule is determined as shown in Table 2.

[0093] Table 2

[0094]

[0095] Among them, the rotation rules corresponding to (25°, 70°] in the above Table 2 are: (25°, 26°] rotates one part, (26°, 28°] rotates one part, (28°, 31°] rotates one part, (31°, 35°] rotates one part, (35°, 40°] rotates one part, (40°, 46°] rotates one part, (46°, 53°] rotates one part, (53°, 61°] rotates one part, (63°, 70°] rotates one part.

[0096] Step 5: Determine the rotation rules corresponding to each grid according to the grid rotation rules and the angle range of each grid, and rotate each grid according to the corresponding rotation rules to obtain a three-dimensional model of the tire, as shown in the following figure. Figure 5 The three-dimensional model shown.

[0097] and Figure 6 is a three-dimensional model obtained by rotating using traditional grid rotation rules, where Figure 6 The grid within 60° of the grounding area is rotated 40 times, and the grid within the remaining 300° is rotated 100 times. Figure 5 and Figure 6 It can be seen that the degree of encryption of the rotation rule adopted in the embodiment of the present application in the sidewall area is higher than that of the traditional grid rotation rule.

[0098] In addition, the finite element calculation software is used to generate the model generated by the model generation method provided in the embodiment of the present application. Figure 5 The 3D model shown is generated by rotating the mesh using traditional mesh rotation rules. Figure 6 The tire footprint simulation calculation was performed using the three-dimensional model shown in the figure, and the footprint simulation results shown in Table 3 were obtained.

[0099] Table 3

[0100] Compare Projects Methods of the present application Conventional methods Actual measurement results Imprint edge angle 0.5° / piece 1.5° / portion / Recognition accuracy / mm 1.5 4.5 1.1 Calculation time / min 36 58 / Imprint length / mm 245 233.5 242 Inner length / mm 222.5 220.5 223 Outer length / mm 222.5 220.5 223 Imprint width / mm 241 247 243

[0101] At the same time, get Figure 7 The comparison chart of the impression cloud diagram shown in the figure, Figure 7 On the left side is Figure 5 The impression cloud corresponding to the three-dimensional model shown is on the right. Figure 6 The impression cloud corresponding to the three-dimensional model shown in Table 3 and Figure 7 It is not difficult to see that when the three-dimensional model obtained in the embodiment of the present application is used for imprint simulation, the simulation accuracy at the edge of the imprint is closer to the actual measurement result. At the same time, the use of fewer three-dimensional units greatly reduces the entire simulation calculation time and significantly improves the accuracy.

[0102] Based on the scheme defined in the above steps S202 to S208, it can be known that in the embodiment, the angle of the major axis of the tire's contact footprint in the tire circumferential direction is determined according to the tire's specification parameters when the tire contacts the ground, and the grid rotation rule corresponding to the angle is determined, so that the grids in different areas are respectively executed with the corresponding rotation rule according to the grid rotation rule, and finally each grid is rotated according to the corresponding rotation rule to obtain a three-dimensional model of the tire. It can be seen that the technical solution of the embodiment of the present application effectively improves the model accuracy of the tire three-dimensional finite element model, thereby achieving the purpose of significantly improving the tire footprint simulation accuracy without sacrificing simulation efficiency.

[0103] Example 2

[0104] Based on the first embodiment of the present application, an embodiment of a tire three-dimensional model generation device is also provided, and the tire three-dimensional model generation method of the above embodiment is executed when the device is running. Figure 8 is a schematic structural diagram of an optional tire three-dimensional model generating device according to an embodiment of the present application, such as Figure 8 As shown, the tire three-dimensional model generating device at least includes an acquisition module 82, a first determination module 84, a second determination module 86 and a model generating module 88, wherein:

[0105] An acquisition module 82, used to acquire specification parameters of the tire and acquire multiple grids in the two-dimensional cross-sectional model of the tire;

[0106] A first determination module 84 is used to determine a first position angle of a major axis of a contact patch of the tire in a circumferential direction of the tire when the tire contacts the ground according to the specification parameters, and determine a grid rotation rule corresponding to the first position angle, wherein the grid rotation rule includes a correspondence between a plurality of angle ranges and the rotation rule;

[0107] A second determining module 86 is used to determine the rotation rule of each grid according to the grid rotation rule and the angle range of each grid;

[0108] The model generation module 88 is used to rotate each grid according to a corresponding rotation rule to obtain a three-dimensional model of the tire.

[0109] It should be noted that the various modules in the above-mentioned tire three-dimensional model generation device can be program modules (for example, a set of program instructions that implement a certain specific function) or hardware modules. For the latter, it can be expressed in the following forms, but is not limited to this: the expression form of each of the above-mentioned modules is a processor, or the functions of each of the above-mentioned modules are implemented by a processor.

[0110] Example 3

[0111] According to an embodiment of the present application, a non-volatile storage medium is further provided, in which a program is stored, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute the tire three-dimensional model generation method in Example 1.

[0112] Optionally, the device where the non-volatile storage medium is located implements the following steps by running the program:

[0113] Step S1, obtaining specification parameters of the tire and obtaining a plurality of grids in a two-dimensional cross-sectional model of the tire;

[0114] Step S2, determining a first position angle of a major axis of a contact patch of the tire in a circumferential direction of the tire when the tire contacts the ground according to the specification parameters, and determining a grid rotation rule corresponding to the first position angle, wherein the grid rotation rule includes a correspondence between a plurality of angle ranges and the rotation rule;

[0115] Step S3, determining the rotation rules corresponding to each grid according to the grid rotation rule and the angle range of each grid;

[0116] Step S4: rotating each grid according to a corresponding rotation rule to obtain a three-dimensional model of the tire.

[0117] According to an embodiment of the present application, a computer program product is further provided. The computer program product includes a stored computer program, wherein when the computer program is executed by a processor, the method for generating a three-dimensional tire model in Embodiment 1 is implemented.

[0118] Optionally, the computer program executes the following steps:

[0119] Step S1, obtaining specification parameters of the tire and obtaining a plurality of grids in a two-dimensional cross-sectional model of the tire;

[0120] Step S2, determining a first position angle of a major axis of a contact patch of the tire in a circumferential direction of the tire when the tire contacts the ground according to the specification parameters, and determining a grid rotation rule corresponding to the first position angle, wherein the grid rotation rule includes a correspondence between a plurality of angle ranges and the rotation rule;

[0121] Step S3, determining the rotation rules corresponding to each grid according to the grid rotation rule and the angle range of each grid;

[0122] Step S4: rotating each grid according to a corresponding rotation rule to obtain a three-dimensional model of the tire.

[0123] According to an embodiment of the present application, a processor is further provided, and the processor is used to run a program, wherein the tire three-dimensional model generating method in embodiment 1 is executed when the program is run.

[0124] Optionally, the following steps are performed when the program is running:

[0125] Step S1, obtaining specification parameters of the tire and obtaining a plurality of grids in a two-dimensional cross-sectional model of the tire;

[0126] Step S2, determining a first position angle of a major axis of a contact patch of the tire in a circumferential direction of the tire when the tire contacts the ground according to the specification parameters, and determining a grid rotation rule corresponding to the first position angle, wherein the grid rotation rule includes a correspondence between a plurality of angle ranges and the rotation rule;

[0127] Step S3, determining the rotation rules corresponding to each grid according to the grid rotation rule and the angle range of each grid;

[0128] Step S4: rotating each grid according to a corresponding rotation rule to obtain a three-dimensional model of the tire.

[0129] According to an embodiment of the present application, an electronic device is also provided, wherein: Fig. 9 is a schematic diagram of the structure of an optional electronic device according to an embodiment of the present application, such as Fig. 9 As shown, the electronic device includes one or more processors; a memory for storing one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors are implemented to run the programs, wherein the programs are configured to execute the tire three-dimensional model generation method in the above-mentioned embodiment 1 when running.

[0130] Optionally, the processor is configured to implement the following steps by executing a computer program:

[0131] Step S1, obtaining specification parameters of the tire and obtaining a plurality of grids in a two-dimensional cross-sectional model of the tire;

[0132] Step S2, determining a first position angle of a major axis of a contact patch of the tire in a circumferential direction of the tire when the tire contacts the ground according to the specification parameters, and determining a grid rotation rule corresponding to the first position angle, wherein the grid rotation rule includes a correspondence between a plurality of angle ranges and the rotation rule;

[0133] Step S3, determining the rotation rules corresponding to each grid according to the grid rotation rule and the angle range of each grid;

[0134] Step S4: rotating each grid according to a corresponding rotation rule to obtain a three-dimensional model of the tire.

[0135] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0136] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0137] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be 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 interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0138] 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 over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0139] In addition, each functional unit in each embodiment of the present application 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. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0140] 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 computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the relevant technology or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0141] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for generating a three-dimensional tire model, characterized in that: include: Obtaining specification parameters of a tire and obtaining a plurality of grids in a two-dimensional cross-sectional model of the tire; Determining, based on the specification parameters, a first position angle of a major axis of a contact patch of the tire in a circumferential direction of the tire when the tire contacts the ground, and determining a grid rotation rule corresponding to the first position angle, wherein the grid rotation rule includes a correspondence between a plurality of angle ranges and rotation rules; Determine the rotation rules corresponding to each of the grids according to the grid rotation rule and the angle range of each of the grids; Each of the grids is rotated according to the corresponding rotation rule to obtain a three-dimensional model of the tire.

2. The method according to claim 1, characterized in that A plurality of grids in the two-dimensional cross-sectional model of the tire is obtained, including: Obtaining a material distribution map of the tire, wherein the material distribution map is used to reflect the size and material distribution of the cross section from the tread centerline to the sidewall of the tire; The preset finite element analysis software is called to mesh the tire according to the material distribution diagram of the tire to obtain a two-dimensional cross-sectional model including the multiple meshes.

3. The method according to claim 1, characterized in that Determining, according to the specification parameters, a first position angle of a major axis of a contact patch of the tire in a circumferential direction of the tire when the tire contacts the ground, comprises: Calculating the load radius of the tire according to the specification parameters, wherein the specification parameters include at least one of the following: rim diameter, inflated outer diameter, and section height coefficient; The first position angle is calculated according to the load radius of the tire and the following formula: Where α represents the first position angle, R L represents the load radius, D represents the outer diameter after inflation, arccos(·) represents the inverse cosine function.

4. The method according to claim 3, characterized in that: Calculating the load radius of the tire according to the specification parameters includes: Based on the specification parameters, the load radius of the tire is calculated according to the following formula: Where R L Denotes the load radius, D r represents the rim diameter, D represents the outer diameter after inflation, and F R represents the section height coefficient.

5. The method according to claim 1, characterized in that The rotation rule at least includes: the number of rotations per unit angle, and the multiple corresponding relationships in the grid rotation rule include: When the angle range is the first angle range, the corresponding unit angle rotation number is the first unit angle rotation number, wherein the lower limit of the first angle range is 0°, and the upper limit is a second angle obtained by subtracting the first angle from the first position angle; When the angle range is the second angle range, the corresponding unit angle rotation number is the second unit angle rotation number, wherein the lower limit of the second angle range is the second angle, the upper limit is the fourth angle obtained by subtracting the third angle from the first position angle, and the first angle is greater than the third angle; When the angle range is the third angle range, the corresponding unit angle rotation number is the third unit angle rotation number, wherein the lower limit of the third angle range is the fourth angle, the upper limit is the fifth angle obtained by adding the first position angle to the third angle, and the third unit angle rotation number is the preset minimum unit angle rotation number; When the angle range is the fourth angle range, the corresponding unit angle rotation number is the fourth unit angle rotation number, wherein the lower limit of the fourth angle range is the fifth angle, the upper limit is the seventh angle obtained by adding the first position angle to the sixth angle, and the sixth angle is greater than the first angle; When the angle range is the fifth angle range, the corresponding unit angle rotation number is the fifth unit angle rotation number, wherein the lower limit of the fifth angle range is the seventh angle and the upper limit is 180°.

6. The method according to claim 1, characterized in that Determining the rotation rule of each grid according to the grid rotation rule and the angle range of each grid, including: For each of the grids, a second position angle of the grid in the two-dimensional cross-sectional model is determined, and an angle range of the second position angle is determined, and a rotation rule corresponding to the angle range is determined from the grid rotation rule.

7. The method according to claim 1, characterized in that Rotating each of the grids according to the corresponding rotation rule to obtain a three-dimensional model of the tire includes: Taking the central axis of the tire as the rotation axis, each of the grids is rotated according to the corresponding rotation rule to obtain a three-dimensional model of the tire.

8. A tire three-dimensional model generating device, characterized in that: include: An acquisition module, used to acquire specification parameters of a tire and acquire a plurality of grids in a two-dimensional cross-sectional model of the tire; a first determination module, configured to determine, based on the specification parameters, a first position angle of a major axis of a contact patch of the tire in a circumferential direction of the tire when the tire contacts the ground, and determine a grid rotation rule corresponding to the first position angle, wherein the grid rotation rule includes a correspondence between a plurality of angle ranges and rotation rules; A second determining module, used to determine a rotation rule of each of the grids according to the grid rotation rule and the angle range of each of the grids; The model generation module is used to rotate each of the grids according to the corresponding rotation rule to obtain a three-dimensional model of the tire.

9. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a computer program, wherein the device where the non-volatile storage medium is located executes the tire three-dimensional model generating method according to any one of claims 1 to 7 by running the computer program.

10. A computer program product, characterized in that include: A computer program, wherein when the computer program is executed by a processor, the method for generating a three-dimensional tire model according to any one of claims 1 to 7 is implemented.

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