Wheel durability analysis method and device, computer equipment and storage medium

Abstract

The invention relates to the technical field of durability analysis, and discloses a wheel durability analysis method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining road spectrum data of a to-be-detected vehicle; for a to-be-tested wheel of the to-be-tested vehicle, establishing a finite element model of the to-be-tested wheel; determining a rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested, and determining a grounding point of the finite element model; connecting the rim loading area with the grounding point, configuring the loaded stress for the wheel center and the rim outer surface of the to-be-tested wheel, and generating a stress model of the to-be-tested wheel; and performing finite element durability analysis according to the stress model and the road spectrum data, and determining durability information of the wheel to be tested. The method is close to a scene used by a user, and the accuracy and reliability of durability analysis can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of durability analysis, and in particular to a wheel durability analysis method, device, computer equipment and storage medium. Background Art

[0002] The wheels of a vehicle are one of the important safety parts of the chassis. They support the mass of the vehicle, transmit driving force, braking force and steering force. Their safety and reliability are particularly important.

[0003] During the early development of the vehicle, the durability assessment methods for the wheels specifically include bending fatigue, radial fatigue, biaxial fatigue, etc.; among them, wheel durability development often follows the previous oil vehicle projects and is developed according to past experience. However, for electric vehicle projects, as the tire diameter becomes larger and the thickness becomes thinner, past experience often has certain limitations, making it difficult to accurately implement durability analysis. Summary of the invention

[0004] In view of this, the present invention provides a wheel durability analysis method, device, computer equipment and storage medium to solve the problem that wheel durability analysis is relatively difficult.

[0005] In a first aspect, the present invention provides a method for analyzing the durability of a wheel, comprising:

[0006] Obtain the road spectrum data of the vehicle to be tested;

[0007] For a wheel to be tested of the vehicle to be tested, establishing a finite element model of the wheel to be tested;

[0008] Determine the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested, and determine the grounding point of the finite element model;

[0009] Connecting the rim loading area with the grounding point, configuring the loaded stress for the wheel center and the rim outer surface of the wheel to be tested, and generating a stress model of the wheel to be tested;

[0010] A finite element durability analysis is performed according to the stress model and the road spectrum data to determine the durability information of the wheel to be tested.

[0011] In some optional implementations, determining the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested includes:

[0012] Calculating the loading connection angle of the wheel to be tested according to the rim radius, tire radius and static load radius of the wheel to be tested; the loading connection angle is the angle corresponding to the tire contact area;

[0013] The area corresponding to the loading connection angle in the rim of the finite element model is used as the rim loading area.

[0014] In some optional implementations, the calculating the loading connection angle of the wheel to be tested according to the rim radius, the tire radius and the static load radius of the wheel to be tested comprises:

[0015] The minimum loading connection angle of the wheel to be tested is calculated according to the rim radius, tire radius and static load radius of the wheel to be tested; the minimum loading connection angle is:

[0016]

[0017] Calculate the coverage angle corresponding to the rim of the wheel to be tested; the coverage angle is:

[0018]

[0019] Wherein, α is half of the minimum loading connection angle, SLR is the static load radius, R1 is the tire radius, β is half of the coverage angle, and R2 is the rim radius;

[0020] A loading connection angle of the wheel to be tested is determined according to the coverage angle, and the loading connection angle is not less than the minimum loading connection angle.

[0021] In some optional implementations, the step of using the area corresponding to the loading connection angle in the rim of the finite element model as the rim loading area includes:

[0022] The spoke of the wheel to be tested is set to correspond to the grounding point, and the spoke area corresponding to the loading connection angle in the rim of the finite element model is used as the first rim loading area;

[0023] And / or, a window between the spokes of the wheel to be tested is set to correspond to the grounding point, and a window area corresponding to the loading connection angle in the rim of the finite element model is used as a second rim loading area.

[0024] In some optional implementations, performing finite element durability analysis according to the stress model and the road spectrum data to determine the durability information of the wheel to be tested includes:

[0025] Performing a finite element durability analysis based on the road spectrum data and a stress model of the first rim loading area connected to the grounding point to obtain first total durability information of the spoke area; determining the durability information of the spoke area by multiplying the first total durability information by an angle ratio corresponding to the loading connection angle;

[0026] and / or,

[0027] Performing a finite element durability analysis based on the road spectrum data and the stress model of the second rim loading area connected to the ground contact point to obtain second total durability information of the window area; determining the durability information of the window area by multiplying the second total durability information by an angle ratio corresponding to the loading connection angle;

[0028] The angle ratio is the ratio between the loading connection angle and 360°.

[0029] In some optional implementations, the connecting the rim loading area to the ground point includes:

[0030] Connecting the grounding point to the rim loading area through a flexible connection unit;

[0031] A connection unit for characterizing the stiffness of the grounding point is provided for the grounding point; one end of the connection unit is connected to the grounding point, and the other end is constrained;

[0032] The tire stiffness information in multiple directions is set for the contact point.

[0033] In some optional embodiments, the stresses loaded on the wheel center and the outer surface of the rim of the wheel to be tested include:

[0034] Loading the tire pressure of the wheel to be tested onto the outer surface of the rim;

[0035] The wheel center of the wheel to be tested is connected to each wheel mounting bolt area through a rigid connection unit, and unit forces in multiple directions are loaded on the wheel center of the wheel to be tested.

[0036] In a second aspect, the present invention provides a wheel durability analysis device, comprising:

[0037] A road spectrum acquisition module is used to obtain the road spectrum data of the vehicle to be tested;

[0038] A model module, used for establishing a finite element model of the wheel to be tested of the vehicle to be tested;

[0039] A rim loading module, used to determine the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested, and determine the grounding point of the finite element model;

[0040] A processing module, used for connecting the rim loading area with the grounding point, configuring the loaded stress for the wheel center and the rim outer surface of the wheel to be tested, and generating a stress model of the wheel to be tested;

[0041] The durability analysis module is used to perform finite element durability analysis based on the stress model and the road spectrum data to determine the durability information of the wheel to be tested.

[0042] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the durability analysis method of the wheel according to the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0043] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the wheel durability analysis method of the first aspect or any corresponding embodiment thereof.

[0044] In a fifth aspect, the present invention provides a computer program product, comprising computer instructions for causing a computer to execute the wheel durability analysis method of the first aspect or any corresponding embodiment thereof.

[0045] The present invention configures the stresses loaded on the wheel center and the outer surface of the rim for the finite element model of the wheel to be tested, locates the rim loading area and the grounding point based on the static load radius, and then connects the rim loading area and the grounding point to construct a stress model suitable for durability analysis; and, combined with the real road spectrum data of the vehicle, it can improve the accuracy and reliability of the durability analysis. This method is different from the previous experience-based durability fatigue analysis scheme, which can be closer to the user's usage scenario, is conducive to the development of wheels that better meet the durability requirements, can shorten the product development cycle, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 is a schematic flow chart of a durability analysis method for a wheel according to an embodiment of the present invention;

[0048] Figure 2 is a cross-sectional schematic diagram of a wheel according to an embodiment of the present invention;

[0049] Figure 3 is a schematic flow chart of another wheel durability analysis method according to an embodiment of the present invention;

[0050] Figure 4 is a schematic diagram of the principle of calculating the loading connection angle according to an embodiment of the present invention;

[0051] Figure 5 is a schematic diagram of a stress model according to an embodiment of the present invention;

[0052] Figure 6 is a schematic diagram of different rim loading areas according to an embodiment of the present invention;

[0053] Figure 7 is a structural block diagram of a wheel durability analysis device according to an embodiment of the present invention;

[0054] Figure 8 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0056] Road spectrum generally refers to the road load spectrum (Road load data) of a vehicle driving on the road. It refers to the time history of external loads (generally of a random nature) applied to the structure during the driving process of the car, causing the structure to respond. The response signal generally includes stress, strain, acceleration or force (torque), etc. For some components in the vehicle (such as suspension, battery pack), durability analysis can be performed based on road spectrum, but due to the flexible tires on the outside of the wheels and the rotation of the wheels during movement, it is difficult to perform durability analysis on the wheels based on road spectrum.

[0057] The wheel durability analysis method provided in an embodiment of the present invention utilizes the static load radius of the wheel to quickly establish a stress model of the wheel, and utilizes the road spectrum data actually collected to perform a durability analysis on the stress model of the wheel, thereby avoiding the influence of experience and determining the durability of the wheel more accurately and reliably.

[0058] According to an embodiment of the present invention, an embodiment of a durability analysis method for a wheel 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.

[0059] In this embodiment, a wheel durability analysis method is provided, which can be applied to a device capable of implementing durability analysis, such as a personal computer, a server, or a mobile terminal. Figure 1 : is a flow chart of a durability analysis method for a wheel according to an embodiment of the present invention. Figure 1 As shown, the process includes the following steps.

[0060] Step S101, obtaining the road spectrum data of the vehicle to be tested.

[0061] In this embodiment, when it is necessary to perform durability analysis on the wheels of a certain vehicle, the vehicle can be used as a test vehicle and the road spectrum data of the test vehicle can be obtained. It can be understood that the road spectrum data can be data collected by road testing the test vehicle itself, or data collected by road testing other vehicles of the same model as the test vehicle, and this embodiment does not limit this.

[0062] For example, the durability test specifications required for collecting road spectrum data can be set. The durability test specifications include, for example, the road surface (highway, mountain, etc.) and working conditions (speed, distance, etc.) of the test site. By collecting road spectrum according to the durability test specifications, the road spectrum data of the vehicle to be tested can be collected.

[0063] Step S102: for a wheel to be tested of the vehicle to be tested, a finite element model of the wheel to be tested is established.

[0064] In this embodiment, it is necessary to establish a finite element model of the wheel to be tested, which is the wheel of the vehicle to be tested. A finite element model can be established for each wheel to be tested of the vehicle to be tested, or a durability analysis can be performed on each wheel to be tested based on one finite element model.

[0065] Specifically, the wheel digital model, material information, EN curve (strain life curve) and other related information of the vehicle to be tested can be obtained. The wheel digital model is the basis for establishing a finite element model, which includes the geometric shape and size information of the wheel to be tested, and meshing is performed based on the wheel digital model, such as dividing a regular tetrahedron mesh. The material information and EN curve of the wheel are used as inputs for finite element analysis; for example, the wheel material affects the mechanical properties and response of the wheel, and the EN curve can evaluate the wheel life under certain stress input conditions.

[0066] Step S103, determining the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested, and determining the grounding point of the finite element model.

[0067] In this embodiment, in order to simulate the stress condition of the wheel more realistically, the area of ​​the rim of the wheel to be tested that needs to be loaded with stress, namely, the rim loading area, is determined in the finite element model.

[0068] The wheel to be tested corresponds to a certain static loaded radius (SLR), that is, the vertical distance from the wheel center of the wheel to the loading surface (ground) when a certain load is applied to the tire in a stationary state. Based on the static loaded radius, the grounding point where the force is transmitted in the finite element model can be determined; for example, the point directly below the wheel center and at a distance from the wheel center equal to the static loaded radius can be used as the grounding point.

[0069] Furthermore, the contact area of ​​the tire can be analyzed according to the static load radius, and then the area in the rim that needs to be loaded with stress from the contact point can be determined based on the contact area, and this area is used as the rim loading area. The stress is transmitted by the tire, that is, the rim loading area is specifically the area in the contact area between the rim and the tire that transmits the stress from the contact point.

[0070] Figure 2 A schematic cross-sectional view of a wheel is shown. Figure 2 The solid line represents the wheel rim, and the dotted line represents the wheel tire. Figure 2 As shown, the inner and outer sides of the rim are in contact with the tire, that is, the contact area between the rim and the tire includes these two areas, and the rim loading area is a partial area in the contact area that needs to be loaded with ground stress.

[0071] Step S104, connecting the rim loading area with the grounding point, configuring the loaded stress for the wheel center and the rim outer surface of the wheel to be tested, and generating a stress model of the wheel to be tested.

[0072] In this embodiment, for the finite element model of the wheel to be tested, the stress related to the load needs to be loaded at the wheel center position, based on which the stress that needs to be loaded at the wheel center can be configured. For example, unit forces in six directions can be loaded at the wheel center. For the rim of the wheel to be tested, in addition to the stress at the grounding point, there will also be stress on the outer surface of the rim, so corresponding stress also needs to be configured on the outer surface of the rim. Among them, the outer surface of the rim refers to the side of the rim facing the tire.

[0073] Furthermore, the rim loading area in the finite element model is connected to the grounding point, so that the stress of the grounding point can be transferred to the rim loading area. For example, the rim loading area and the grounding point can be connected based on the connection unit in the finite element analysis. The grounding point can be set with the stiffness information of the tire in three directions, that is, the stiffness information in the three directions of x, y, and z.

[0074] In this embodiment, appropriate stress is configured for the finite element model, and the rim loading area and the grounding point are connected to form a final model of the wheel to be tested. In this embodiment, this model is called a stress model.

[0075] Step S105, performing finite element durability analysis according to the stress model and the road spectrum data to determine the durability information of the wheel to be tested.

[0076] After constructing the stress model of the wheel to be tested, the finite element durability analysis can be performed in combination with the collected road spectrum data, so as to determine the durability information of the wheel to be tested, and the durability information may include, for example, the fatigue life of the wheel to be tested.

[0077] For example, finite element durability analysis can be performed based on engineering integrated fatigue design software. The stress model and road spectrum data can be input into the fatigue design software. The stress model and road spectrum data can be coupled based on the linear superposition method, etc., so as to calculate the damage of the wheel to be tested and obtain its durability information.

[0078] The wheel durability analysis method provided in this embodiment configures the stresses loaded on the wheel center and the outer surface of the rim of the wheel to be tested for the finite element model, locates the rim loading area and the grounding point based on the static load radius, and then connects the rim loading area and the grounding point to construct a stress model suitable for durability analysis; and, combined with the real road spectrum data of the vehicle, it can improve the accuracy and reliability of durability analysis. This method is different from the previous experience-based durability fatigue analysis scheme, which can be closer to the user's usage scenario, is conducive to the development of wheels that better meet durability requirements, can shorten the product development cycle, and reduce costs.

[0079] In this embodiment, a wheel durability analysis method is provided, which can be applied to a device capable of implementing durability analysis, such as a personal computer, a server, or a mobile terminal. Figure 3 : is a flow chart of a durability analysis method for a wheel according to an embodiment of the present invention. Figure 3 As shown, the process includes the following steps.

[0080] Step S301, obtaining the road spectrum data of the vehicle to be tested.

[0081] For details, please see Figure 1 Step S101 of the illustrated embodiment will not be described in detail here.

[0082] Step S302: for a wheel to be tested of the vehicle to be tested, a finite element model of the wheel to be tested is established.

[0083] For details, please see Figure 1 Step S102 of the illustrated embodiment will not be described in detail here.

[0084] Step S303, determining the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested, and determining the grounding point of the finite element model.

[0085] Specifically, the above step S303 of “determining the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested” may include steps S3031 and S3032.

[0086] Step S3031, calculating the loading connection angle of the wheel to be tested according to the rim radius, tire radius and static load radius of the wheel to be tested; the loading connection angle is the angle corresponding to the tire contact area.

[0087] In this embodiment, in order to represent the force of the tire on the rim based on the finite element model, in addition to the static load radius, it is also necessary to obtain the rim radius of the wheel to be tested and the radius of the tire installed on the outside of the wheel, that is, the tire radius. Based on these parameters, the contact area of ​​the tire is determined, so that the angle that can represent the contact area of ​​the tire can be determined, thereby representing the loading connection angle.

[0088] The loading connection angle is used to determine the rim loading area, and the loading connection angle is an angle corresponding to the tire contact area with the wheel center as the vertex. For example, the sector area corresponding to the loading connection angle can cover the tire contact area.

[0089] In some optional implementations, the above step S3031 "calculating the loading connection angle of the wheel to be tested according to the rim radius, tire radius and static load radius of the wheel to be tested" may include steps A1 to A3.

[0090] Step A1, calculating the minimum loading connection angle of the wheel to be tested according to the rim radius, tire radius and static load radius of the wheel to be tested; the minimum loading connection angle is:

[0091]

[0092] Step A2, calculating the coverage angle corresponding to the rim of the wheel to be tested; the coverage angle is:

[0093]

[0094] Where α is half of the minimum loading connection angle, SLR is the static load radius, R1 is the tire radius, β is half of the coverage angle, and R2 is the rim radius.

[0095] In this embodiment, based on the tire radius R1 and the static load radius SLR of the wheel to be tested, the contact area of ​​the tire can be determined.

[0096] Figure 4 The schematic diagram of the principle of calculating the loading connection angle is shown in FIG. Figure 4As shown in the figure, O is the wheel center, A and B are the outermost sides of the tire contact area, and the plane where A and B are located is the ground, that is, the area between A and B belongs to the tire contact area; among them, the ground point C directly below the wheel center O can be used as the contact point. And the length of OC is the static load radius SLR.

[0097] In this embodiment, the minimum angle corresponding to the rim connection area, that is, the minimum loading connection angle, can be determined based on the tire contact area and the wheel center O; Figure 4 As shown in the figure, α represents half of the minimum loading connection angle, and the minimum loading connection angle is 2α. Figure 4 The position relationship shown in the figure shows that the minimum loading connection angle 2α is:

[0098] Furthermore, if the tire contact area only transfers stress upward, the angle at which the rim needs to be loaded with ground stress, i.e., the coverage angle, can be determined. Figure 4 As shown, point D on the rim directly above point B can be determined, and β represents half of the coverage angle, then the coverage angle is 2β, and it can be calculated:

[0099] For example, the tire radius R1 is 360 mm and the static load radius SLR is 340 mm. Based on this, the minimum loading connection angle 2α can be calculated as: The rim radius R2 can be determined based on the tire model corresponding to the wheel to be tested. For example, if the tire model of the wheel to be tested is 265 / 40R20, "265" represents the tire section width in mm, "40" is the aspect ratio, that is, the ratio of the tire sidewall height to the tire section width, 40 represents 40%; R is the abbreviation of Radial, indicating that the tire has a radial layer structure; "20" is the outer diameter (diameter) of the rim in inches. Based on this, if the diameter of the rim is 20 inches, that is, 508mm, the rim radius is 254mm, and the coverage angle 2β is:

[0100]

[0101] Step A3: determining a loading connection angle of the wheel to be tested according to the coverage angle, and the loading connection angle is not less than a minimum loading connection angle.

[0102] In this embodiment, the coverage angle 2β can be directly used as the loading connection angle of the wheel to be tested; or, generally speaking, for the rim, part of the area outside the coverage angle 2β will also be affected by the stress from the ground, so the coverage angle 2β can be multiplied by a certain coefficient (such as 1.1, 1.2, etc.), and the loading connection angle can be determined based on this. Among them, the coefficient can also be less than 1, but the determined loading connection angle is not less than the minimum loading connection angle 2α.

[0103] For example, if the coverage angle 2β is 55.5°, it can be multiplied by a coefficient greater than 1, and the result of the multiplication is used as the loading connection angle. For example, the coefficient is 1.17, and the result of the multiplication is 65°, so the loading connection angle is set to 65°.

[0104] Step S3032: taking the area corresponding to the loading connection angle in the rim of the finite element model as the rim loading area.

[0105] In this embodiment, the loading connection angle indicates the range of the rim where the stress of the grounding point needs to be loaded, so the corresponding rim loading area can be determined based on the size of the loading connection angle. Since the grounding point transfers stress upward, the rim loading area is the area directly below the wheel center corresponding to the loading connection angle.

[0106] Step S304, connecting the rim loading area with the grounding point, configuring the loaded stress for the wheel center and the rim outer surface of the wheel to be tested, and generating a stress model of the wheel to be tested.

[0107] For details, please see Figure 1 Step S104 of the illustrated embodiment will not be described in detail here.

[0108] In some optional implementations, the process of "connecting the rim loading area to the grounding point" in the above step S304 may specifically include the following steps B1 to B3.

[0109] Step B1, connecting the docking point with the rim loading area through a flexible connection unit.

[0110] Step B2, setting a connection unit for the grounding point to characterize the stiffness of the grounding point; one end of the connection unit is connected to the grounding point, and the other end is constrained.

[0111] Step B3, setting the tire stiffness information in multiple directions for the contact point.

[0112] In this embodiment, the grounding point can be connected to each finite element in the rim loading area by using a flexible connection unit in the finite element analysis; the flexible connection unit can be, for example, RBE3 (where RBE is the abbreviation of Rigid Bar Element, i.e., a rigid bar element), which is a form of multi-point constraint (MPC). It can be understood that since the inner and outer sides of the rim are in contact with the tire, the rim loading area also includes two parts of the inner and outer sides of the rim.

[0113] In order to accurately simulate the complex connection and contact behavior of the wheel, the stiffness information of the tire in multiple directions (generally including the three directions of x, y, and z) is set at the contact point; and a connection unit for characterizing the stiffness of the contact point is also set at the contact point. The connection unit can be, for example, a Bush unit (i.e., a commonly used connection unit that can have stiffness and damping in up to six directions). One end of the connection unit is connected to the contact point, and the other end is constrained, for example, 1 to 6 degrees of freedom can be constrained. In general, the length of the connection unit is set to 0.

[0114] Figure 5 A schematic diagram of the stress model is shown in Figure 2. Figure 5 As shown in the figure, if the loading connection angle is 65°, the area directly below the wheel center corresponding to the loading connection angle in the rim can be used as the rim loading area, and the grounding point is connected to the rim loading area based on RBE3. In addition, a Bush unit is set at the grounding point to characterize the stiffness of the grounding point.

[0115] Optionally, the process of "configuring the loaded stress for the wheel center and the outer surface of the rim of the wheel to be tested" in the above step S304 may specifically include the following steps B4 to B5.

[0116] Step B4, loading the tire pressure of the wheel to be tested onto the outer surface of the rim.

[0117] Step B5, connecting the wheel center of the wheel to be tested with each wheel mounting bolt area through a rigid connection unit, and loading unit forces in multiple directions on the wheel center of the wheel to be tested.

[0118] In this embodiment, for the area where the rim and the tire are not in direct contact, that is, the outer surface of the rim, the tire pressure of the wheel to be tested can be loaded onto the outer surface of the rim, and corresponding stress can be set for the outer surface of the rim based on the tire pressure. For the wheel center of the wheel to be tested, a rigid connection unit is connected to each wheel mounting bolt area, and unit forces in multiple directions (generally six directions) are loaded onto the wheel center, and the load stress of the wheel center can be transmitted based on the rigid connection unit.

[0119] For example, the rigid connection unit may be RBE2. Figure 5 As shown, the wheel center and the wheel mounting bolt area are connected based on multiple RBE2 ( Figure 5 The wheel includes five mounting bolt areas as an example), and unit load forces in six directions are applied to the wheel center.

[0120] In this embodiment, using Figure 5 The stress model shown can be used to calculate the stress distribution of the wheel to be tested, such as Mises stress.

[0121] Step S305, performing finite element durability analysis according to the stress model and the road spectrum data to determine the durability information of the wheel to be tested.

[0122] For details, please see Figure 1 Step S105 of the illustrated embodiment will not be described in detail here.

[0123] In some optional implementations, since the wheel is generally provided with spokes connected to the rim, the force on the rim is slightly different when there are spokes or not. In this embodiment, different rim loading areas are set based on different postures of the wheel to be tested to achieve more accurate and comprehensive durability analysis. Specifically, the above step S3032 "using the area corresponding to the loading connection angle in the rim of the finite element model as the rim loading area" may include step C1 and / or step C2.

[0124] Step C1, setting the corresponding grounding point of the spoke of the wheel to be tested, and taking the spoke area corresponding to the loading connection angle in the rim of the finite element model as the first rim loading area.

[0125] Step C1, setting the window between the spokes of the wheel to be tested to correspond to the grounding point, and taking the window area corresponding to the loading connection angle in the rim of the finite element model as the second rim loading area.

[0126] In this embodiment, by adjusting the posture of the wheel to be tested, such as rotating the wheel to be tested, the position corresponding to the grounding point in the wheel to be tested can be adjusted. Specifically, when the spoke of the wheel to be tested corresponds to the grounding point, the corresponding rim loading area, i.e., the first rim loading area, can be determined based on the loading connection angle, and the first rim loading area corresponds to the area in the rim connected to the spoke. Among them, when the lowermost area of ​​the rim is connected to a certain spoke, the spoke of the wheel to be tested corresponds to the grounding point, or in other words, the grounding point is directly below a certain spoke of the wheel to be tested.

[0127] Similarly, if there are windows between the spokes of the wheel, and if a certain window of the wheel to be tested corresponds to the grounding point, the corresponding rim loading area, i.e., the second rim loading area, can also be determined based on the loading connection angle, and the second rim loading area corresponds to the area in the rim connecting the windows. When the lowermost area of ​​the rim corresponds to a certain window, the window of the wheel to be tested corresponds to the grounding point, or in other words, the grounding point is directly below a certain window of the wheel to be tested.

[0128] Figure 6 A schematic diagram of different rim loading areas is shown. Figure 6 As shown in FIG. 1 , the wheel to be tested has five spokes, and there is a window between two adjacent spokes, for a total of five windows. Figure 6 As shown in the left half of the figure, the grounding point is directly below a spoke, and in this stress model, the first rim loading area of ​​the grounding point is connected to the spoke through RBE3; similarly, Figure 6 As shown in the middle right half, the grounding point is directly below a window, and in the stress model, the second rim loading area through RBE3 and the grounding point corresponds to the window.

[0129] Different rim loading areas can form different stress models after being electrically connected to the ground. The durability of different areas of the rim can be determined by performing finite element durability analysis using each stress model.

[0130] Optionally, the above step S305 of "performing a finite element durability analysis according to the stress model and the road spectrum data to determine the durability information of the wheel to be tested" specifically includes the following steps D1 and / or step D2.

[0131] Step D1, performing finite element durability analysis based on the road spectrum data and the stress model of the first rim loading area connected to the grounding point, to obtain the first total durability information of the spoke area; the durability information of the spoke area is determined by multiplying the first total durability information by the angle ratio corresponding to the loading connection angle.

[0132] Step D2, performing finite element durability analysis based on the road spectrum data and the stress model of the second rim loading area connected to the grounding point to obtain the second total durability information of the window area; multiplying the second total durability information by the angle ratio corresponding to the loading connection angle to determine the durability information of the window area.

[0133] The angle ratio is the ratio between the loading connection angle and the circumferential angle, that is, the ratio between the loading connection angle and 360°.

[0134] In the present embodiment, when performing durability analysis based on the stress model of the wheel to be tested, since the stress model is static, that is, the wheel to be tested is stationary, the durability information directly calculated based on the road spectrum data is calculated when the wheel to be tested is not rotating, and the main stress-bearing area of ​​the rim of the wheel to be tested is the rim loading area, so the proportion of the actual endurance can be determined based on the corresponding loading connection angle, thereby determining the endurance information corresponding to the rim loading area.

[0135] Specifically, the ratio between the loading connection angle and 360° is used as the angle ratio for determining the actual endurance information. After the total endurance information is calculated based on the stress model and the road spectrum data, the total endurance information is multiplied by the angle ratio to obtain the endurance information of the rim loading area. For example, if the loading connection angle is 65°, the angle ratio is 65 / 360.

[0136] Therefore, when it is necessary to perform durability analysis on the spoke area of ​​the rim, the first rim loading area can be determined based on the above step C1, and then as shown in step D1, the first rim loading area is connected to the ground point to form a corresponding stress model, and then the road spectrum data and the stress model are used to perform finite element durability analysis to determine the relevant durability information when the wheel is stationary, that is, the first total durability information of the spoke area in the rim. The first total durability information is multiplied by the angle ratio (for example, 65 / 360) to calculate the durability information of the first rim loading area, that is, the durability information of the spoke area.

[0137] Similarly, when it is necessary to perform a durability analysis on the window area of ​​the rim, the second rim loading area can be determined based on the above step C2, and the durability information of the window area can be calculated through step D2.

[0138] It can be understood that by rotating the wheel to be tested at different angles, the wheel to be tested can be placed in different postures, so that endurance analysis can be performed on the rim loading area corresponding to each posture to obtain more refined durability information.

[0139] The wheel durability analysis method provided in this embodiment locates the rim loading area and the grounding point based on the static load radius, and connects the rim loading area and the grounding point to construct a stress model suitable for durability analysis. The durability analysis is performed in combination with the real road spectrum data of the vehicle, which can improve accuracy and reliability. The road spectrum can truly reflect the external load and vibration conditions that the vehicle is subjected to during actual road driving, and is closer to the user's usage scenario. The loading connection angle of the rim is first determined, and the loading area of ​​the rim is located based on the angle. The implementation method is simple and suitable for different postures of the wheel to be tested. The rotating wheel is stationary, and the durability analysis of the wheel is performed at the stationary spokes and windows, etc., to construct different rim loading areas, and then the durability information of the spoke area and window area in the rim can be easily determined.

[0140] In this embodiment, a wheel durability analysis device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" may be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0141] This embodiment provides a wheel durability analysis device, such as Figure 7 As shown, including:

[0142] The road spectrum acquisition module 701 is used to acquire the road spectrum data of the vehicle to be tested;

[0143] A model module 702 is used to establish a finite element model of the wheel to be tested of the vehicle to be tested;

[0144] A rim loading module 703, used to determine the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested, and determine the grounding point of the finite element model;

[0145] The processing module 704 is used to connect the rim loading area with the grounding point, configure the loaded stress for the wheel center and the rim outer surface of the wheel to be tested, and generate a stress model of the wheel to be tested;

[0146] The durability analysis module 705 is used to perform finite element durability analysis according to the stress model and the road spectrum data to determine the durability information of the wheel to be tested.

[0147] In some optional implementations, the rim loading module 703 determines the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested, including:

[0148] Calculating the loading connection angle of the wheel to be tested according to the rim radius, tire radius and static load radius of the wheel to be tested; the loading connection angle is the angle corresponding to the tire contact area;

[0149] The area corresponding to the loading connection angle in the rim of the finite element model is used as the rim loading area.

[0150] In some optional implementations, the rim loading module 703 calculates the loading connection angle of the wheel to be tested according to the rim radius, tire radius and static load radius of the wheel to be tested, including:

[0151] The minimum loading connection angle of the wheel to be tested is calculated according to the rim radius, tire radius and static load radius of the wheel to be tested; the minimum loading connection angle is:

[0152]

[0153] Calculate the coverage angle corresponding to the rim of the wheel to be tested; the coverage angle is:

[0154]

[0155] Wherein, α is half of the minimum loading connection angle, SLR is the static load radius, R1 is the tire radius, β is half of the coverage angle, and R2 is the rim radius;

[0156] A loading connection angle of the wheel to be tested is determined according to the coverage angle, and the loading connection angle is not less than the minimum loading connection angle.

[0157] In some optional implementations, the rim loading module 703 uses the area corresponding to the loading connection angle in the rim of the finite element model as the rim loading area, including:

[0158] The spoke of the wheel to be tested is set to correspond to the grounding point, and the spoke area corresponding to the loading connection angle in the rim of the finite element model is used as the first rim loading area;

[0159] And / or, a window between the spokes of the wheel to be tested is set to correspond to the grounding point, and a window area corresponding to the loading connection angle in the rim of the finite element model is used as a second rim loading area.

[0160] In some optional implementations, the durability analysis module 705 performs finite element durability analysis according to the stress model and the road spectrum data to determine the durability information of the wheel to be tested, including:

[0161] Performing a finite element durability analysis based on the road spectrum data and a stress model of the first rim loading area connected to the grounding point to obtain first total durability information of the spoke area; determining the durability information of the spoke area by multiplying the first total durability information by an angle ratio corresponding to the loading connection angle;

[0162] and / or,

[0163] Performing a finite element durability analysis based on the road spectrum data and the stress model of the second rim loading area connected to the ground contact point to obtain second total durability information of the window area; determining the durability information of the window area by multiplying the second total durability information by an angle ratio corresponding to the loading connection angle;

[0164] The angle ratio is the ratio between the loading connection angle and 360°.

[0165] In some optional implementations, the processing module 704 connects the rim loading area with the grounding point, including:

[0166] Connecting the grounding point to the rim loading area through a flexible connection unit;

[0167] A connection unit for characterizing the stiffness of the grounding point is provided for the grounding point; one end of the connection unit is connected to the grounding point, and the other end is constrained;

[0168] The tire stiffness information in multiple directions is set for the contact point.

[0169] In some optional implementations, the processing module 704 configures the stress loaded on the wheel center and the outer surface of the rim of the wheel to be tested, including:

[0170] Loading the tire pressure of the wheel to be tested onto the outer surface of the rim;

[0171] The wheel center of the wheel to be tested is connected to each wheel mounting bolt area through a rigid connection unit, and unit forces in multiple directions are loaded on the wheel center of the wheel to be tested.

[0172] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0173] The wheel durability analysis device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, including a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0174] The embodiment of the present invention also provides a computer device having the above Figure 7 The durability analysis device of the wheel is shown.

[0175] See also Figure 8 , Figure 8 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 8 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 8 A processor 10 is taken as an example.

[0176] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0177] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0178] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device 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 combinations thereof.

[0179] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0180] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0181] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0182] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0183] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations should all be included in the protection scope of the present invention.

Claims

1. A wheel durability analysis method, characterized in that: The method comprises: Obtain the road spectrum data of the vehicle to be tested; For a wheel to be tested of the vehicle to be tested, establishing a finite element model of the wheel to be tested; Determine the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested, and determine the grounding point of the finite element model; Connecting the rim loading area with the grounding point, configuring the loaded stress for the wheel center and the rim outer surface of the wheel to be tested, and generating a stress model of the wheel to be tested; A finite element durability analysis is performed according to the stress model and the road spectrum data to determine the durability information of the wheel to be tested.

2. The method according to claim 1, characterized in that: The step of determining the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested comprises: Calculating the loading connection angle of the wheel to be tested according to the rim radius, tire radius and static load radius of the wheel to be tested; the loading connection angle is the angle corresponding to the tire contact area; The area corresponding to the loading connection angle in the rim of the finite element model is used as the rim loading area.

3. The method according to claim 2, characterized in that The step of calculating the loading connection angle of the wheel to be tested according to the rim radius, the tire radius and the static load radius of the wheel to be tested comprises: The minimum loading connection angle of the wheel to be tested is calculated according to the rim radius, tire radius and static load radius of the wheel to be tested; the minimum loading connection angle is: Calculate the coverage angle corresponding to the rim of the wheel to be tested; the coverage angle is: Wherein, α is half of the minimum loading connection angle, SLR is the static load radius, R1 is the tire radius, β is half of the coverage angle, and R2 is the rim radius; A loading connection angle of the wheel to be tested is determined according to the coverage angle, and the loading connection angle is not less than the minimum loading connection angle.

4. The method according to claim 2, characterized in that: The step of taking the area corresponding to the loading connection angle in the rim of the finite element model as the rim loading area comprises: The spoke of the wheel to be tested is set to correspond to the grounding point, and the spoke area corresponding to the loading connection angle in the rim of the finite element model is used as the first rim loading area; And / or, a window between the spokes of the wheel to be tested is set to correspond to the grounding point, and a window area corresponding to the loading connection angle in the rim of the finite element model is used as a second rim loading area.

5. The method according to claim 4, characterized in that The performing finite element durability analysis according to the stress model and the road spectrum data to determine the durability information of the wheel to be tested includes: Performing a finite element durability analysis based on the road spectrum data and a stress model of the first rim loading area connected to the grounding point to obtain first total durability information of the spoke area; determining the durability information of the spoke area by multiplying the first total durability information by an angle ratio corresponding to the loading connection angle; and / or, Performing a finite element durability analysis based on the road spectrum data and the stress model of the second rim loading area connected to the ground contact point to obtain second total durability information of the window area; determining the durability information of the window area by multiplying the second total durability information by an angle ratio corresponding to the loading connection angle; The angle ratio is the ratio between the loading connection angle and 360°.

6. The method according to any one of claims 1 to 5, characterized in that The step of connecting the rim loading area to the grounding point comprises: Connecting the grounding point to the rim loading area through a flexible connection unit; A connection unit for characterizing the stiffness of the grounding point is provided for the grounding point; one end of the connection unit is connected to the grounding point, and the other end is constrained; The tire stiffness information in multiple directions is set for the contact point.

7. The method according to any one of claims 1 to 5, characterized in that The stresses loaded on the wheel center and the outer surface of the rim of the wheel to be tested include: Loading the tire pressure of the wheel to be tested onto the outer surface of the rim; The wheel center of the wheel to be tested is connected to each wheel mounting bolt area through a rigid connection unit, and unit forces in multiple directions are loaded on the wheel center of the wheel to be tested.

8. A wheel durability analysis device, characterized in that: The device comprises: A road spectrum acquisition module is used to obtain the road spectrum data of the vehicle to be tested; A model module, used for establishing a finite element model of the wheel to be tested of the vehicle to be tested; A rim loading module, used to determine the rim loading area in the finite element model according to the static load radius corresponding to the wheel to be tested, and determine the grounding point of the finite element model; A processing module, used for connecting the rim loading area with the grounding point, configuring the loaded stress for the wheel center and the rim outer surface of the wheel to be tested, and generating a stress model of the wheel to be tested; The durability analysis module is used to perform finite element durability analysis based on the stress model and the road spectrum data to determine the durability information of the wheel to be tested.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the durability analysis method for a wheel according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the wheel durability analysis method according to any one of claims 1 to 7.

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