Knuckle abnormal sound finite element analysis method, device and equipment

Abstract

The application relates to the technical field of vehicle design, and discloses a knuckle abnormal sound finite element analysis method, device and equipment, the method comprising the following steps: establishing a finite element model of a front suspension system, including an initial knuckle model and a bearing flange model, the initial knuckle model and the bearing flange model are pre-tightened together through a bolt model; applying a load corresponding to a preset working condition to the finite element model, determining pressure change data on a contact surface between the initial knuckle model and the bearing flange model, so as to represent whether a contact surface separation phenomenon occurs between the initial knuckle model and the bearing flange model; in the case that the pressure change data determines that the contact surface separation phenomenon occurs, determining a first reason for abnormal sound of the knuckle. The beneficial effect is that knocking abnormal sound occurring between the knuckle and the bearing flange can be effectively identified, the technical effect of accurately identifying the reason and position of abnormal sound in the front suspension system in the design stage and solving the abnormal sound problem is achieved.

Description

Technical Field

[0001] The present application relates to the field of vehicle design technology, and in particular to a finite element analysis method, device and equipment for abnormal noise in a steering knuckle. Background Art

[0002] The front suspension system is a critical component connecting the vehicle body to the front wheels. It supports the vehicle's weight and absorbs vibrations from the road during driving, ensuring vehicle stability and maneuverability. Abnormal noises within the front suspension system can significantly impact the user's driving experience while also impacting the system's performance and lifespan. Therefore, the cause and location of abnormal noises within the front suspension system must be determined during the design phase and addressed accordingly. The front suspension system contains multiple parts, including steering knuckles and wheel hub bearings, so there are multiple reasons for abnormal noises. Methods are needed to identify specific types of noises. Summary of the Invention

[0003] The present application provides a finite element analysis method, device and equipment for steering knuckle abnormal noise, which can effectively identify the knocking noise occurring between the steering knuckle and the bearing flange, achieving the technical effect of accurately identifying the cause and location of the abnormal noise in the front suspension system during the design stage and solving the abnormal noise problem.

[0004] In order to achieve the above objectives, the main technical solutions adopted in this application include:

[0005] In a first aspect, an embodiment of the present application provides a finite element analysis method for abnormal noise in a steering knuckle, the method comprising:

[0006] Establishing a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, and the initial steering knuckle model and the bearing flange model are pre-tightened together by a bolt model;

[0007] Applying a load corresponding to a preset working condition to the finite element model to determine pressure change data on a contact surface between the initial steering knuckle model and the bearing flange model; wherein the pressure change data is used to indicate whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model;

[0008] When it is determined through the pressure change data that the contact surface separation phenomenon has occurred, a first cause of the abnormal noise generated by the steering knuckle is determined; wherein the first cause is used to guide the update of the contact surface of the initial steering knuckle model.

[0009] The finite element analysis method for abnormal noise in the steering knuckle proposed in the embodiment of the present application simulates the preset working conditions on the finite element model of the vehicle's front suspension system to obtain the pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model under the preset working conditions, and determines the cause and location of the abnormal noise in the steering knuckle based on the pressure change data, so as to update the initial steering knuckle model in a targeted manner, effectively eliminate the abnormal noise in the front suspension system, and improve the reliability of the designed front suspension system; at the same time, this method can also discover problems in advance during the design stage, effectively shorten the design cycle, and reduce design costs.

[0010] In a second aspect, an embodiment of the present application provides a finite element analysis device for abnormal noise in a steering knuckle, the device comprising:

[0011] A model building module, configured to build a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, wherein the initial steering knuckle model and the bearing flange model are pre-tightened together by a bolt model;

[0012] a first load simulation module, configured to apply a load corresponding to a preset working condition to the finite element model to determine pressure change data on a contact surface between the initial steering knuckle model and the bearing flange model; wherein the pressure change data is used to indicate whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model;

[0013] The first abnormal noise analysis module is used to determine a first cause of the abnormal noise generated by the steering knuckle when the contact surface separation phenomenon is determined to have occurred through the pressure change data; wherein the first cause is used to guide the updating of the contact surface of the initial steering knuckle model.

[0014] In a third aspect, an embodiment of the present application provides a computer device comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the method described in any one of the above embodiments by executing the computer instructions.

[0015] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute any one of the methods in the above embodiments.

[0016] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising computer instructions, wherein the computer instructions are used to enable a computer to execute any one of the methods described in the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A diagram showing the steps of the finite element analysis method for steering knuckle abnormal noise provided in an embodiment of the present application;

[0019] Figure 2 This is a diagram showing the steps for determining the contact surface separation phenomenon in an embodiment of the present application;

[0020] Figure 3a This is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model after the screw is pre-tightened in the embodiment of the present application;

[0021] Figure 3b This is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under extreme steering conditions in an embodiment of the present application;

[0022] Figure 3c The pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the single-side deep pit working condition in the embodiment of the present application;

[0023] Figure 3d This is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under washboard road braking conditions in an embodiment of the present application;

[0024] Figure 3e This is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the working condition of turning the steering wheel right in situ in the embodiment of the present application;

[0025] Figure 3f This is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the working condition of turning the steering wheel left in situ in the embodiment of the present application;

[0026] Figure 4 This is a diagram of the steps for processing the abnormal noise caused by the first reason in the embodiment of the present application;

[0027] Figure 5 This is a pressure distribution diagram of the contact surface between the slotted steering knuckle model and the bearing flange model under extreme steering conditions in an embodiment of the present application;

[0028] Figure 6 A diagram showing the steps for determining the second cause in an embodiment of the present application;

[0029] Figure 7This is a pressure distribution diagram of the assembly surface between the initial steering knuckle model and the bearing flange model after the load is applied in the embodiment of the present application;

[0030] Figure 8 This is a diagram of the steps for processing the abnormal noise caused by the second reason in the embodiment of the present application;

[0031] Figure 9 A diagram showing the steps for establishing a finite element model of the front suspension system in an embodiment of the present application;

[0032] Figure 10 A schematic diagram of a finite element model provided in an embodiment of the present application;

[0033] Figure 11 A module diagram of a finite element analysis device for abnormal steering knuckle noise provided in an embodiment of the present application;

[0034] Figure 12 A schematic diagram of the structure of a computer device provided in an embodiment of the present application.

[0035] Among them, the figure numbers of the drawings in the specification are as follows: 100. Model building module, 200. First load simulation module, 300. First abnormal noise analysis module, 401. Position where the pressure on the contact surface changes under extreme steering conditions, 402. Position where the pressure on the contact surface changes under one-sided deep pit conditions, 403. Position where the pressure on the contact surface changes under washboard road braking conditions, 404. Position where the pressure on the contact surface changes under the condition of turning the steering wheel right in place, 405. Position where the pressure on the contact surface changes under the condition of turning the steering wheel left in place, 406. Noise reduction groove, 407. Position where contact friction occurs after load is applied. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions 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 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 those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0037] Cars have become an essential means of transportation in today's society. As people drive more and more in their daily lives, their expectations for car user experience and longevity are gradually increasing. A car's structure primarily consists of the body, chassis, powertrain, suspension, and tires. The suspension system includes both front and rear suspensions. The front suspension is a crucial component connecting the car body to the front wheels, supporting the vehicle's weight while absorbing road vibrations during driving, ensuring vehicle stability and maneuverability.

[0038] The front suspension system consists of multiple parts, including suspension brackets, shock absorbers, steering knuckles, and wheel hub bearings. These parts are assembled and connected to form the front suspension system. However, due to design considerations, different parts may produce abnormal noises under various actual operating conditions due to size and assembly issues. When abnormal noise occurs in the front suspension system, it can propagate from the front suspension system to the vehicle body and then to the driver's seat, significantly affecting the user's driving experience. Furthermore, since the causes of abnormal noise include collisions and compression between parts, these factors can also have a certain impact on the performance and lifespan of the front suspension system. Therefore, it is necessary to determine the cause and location of abnormal noise in the front suspension system, and to make modifications based on the cause to eliminate potential sources of abnormal noise in advance. In reality, abnormal noise can occur for a variety of reasons, so it is necessary to develop methods to identify certain types of abnormal noise.

[0039] Based on the above problems, the present application provides a finite element analysis method, device and equipment for steering knuckle abnormal noise, which is used to analyze the cause and location of abnormal noise generated by the steering knuckle in the front suspension system during the design stage. The method includes: finite element modeling of the entire front suspension system and the connected tires; simulating the preset working conditions of the obtained finite element model to obtain pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model; determining whether contact surface separation occurs based on the pressure change data, and if contact surface separation occurs, determining the cause and location of the abnormal noise generated by the steering knuckle for corresponding updates.

[0040] This method can effectively identify the knocking noise occurring between the steering knuckle and the bearing flange, achieving the technical effect of accurately identifying the cause and location of the abnormal noise in the front suspension system during the design phase, shortening the design cycle, and reducing design costs.

[0041] The finite element analysis method for steering knuckle noise provided in this manual can be applied to the design of vehicle front suspension systems, and accordingly, to the design of vehicle rear suspension systems. It is understood that, after adaptive modifications, this method can also be used in the design of other internal vehicle systems to eliminate noise caused by contact surface separation between parts under actual operating conditions.

[0042] According to an embodiment of the present application, an embodiment of a finite element analysis method for abnormal noise of a steering knuckle 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.

[0043] In this embodiment, a finite element analysis method for steering knuckle abnormal noise is provided, which can be used in the above vehicle design process. Figure 1 , Figure 1 The steps of the finite element analysis method for steering knuckle abnormal noise provided in the embodiment of the present application are shown in the figure. The method includes:

[0044] S100. Establish a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, and the initial steering knuckle model and the bearing flange model are pre-tightened together by a bolt model.

[0045] S200. Apply a load corresponding to a preset working condition to the finite element model to determine the pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model; wherein the pressure change data is used to characterize whether contact surface separation occurs between the initial steering knuckle model and the bearing flange model.

[0046] S300. When it is determined through pressure change data that a contact surface separation phenomenon has occurred, determine a primary cause of abnormal noise generated by the steering knuckle; wherein the primary cause is used to guide updating of the contact surface of the initial steering knuckle model.

[0047] Specifically, the initial steering knuckle model is designed based on actual needs during the design process. It matches the bearing flange model and is assembled with it via a bolt model. The bolt model simulates the real-world bolt connection between the steering knuckle and the bearing flange. Before simulating the preset operating conditions, the bolt model is used to pre-tighten the initial steering knuckle model and the bearing flange model to ensure a realistic assembly relationship. After pre-tightening, uniform pressure on the contact surface between the initial steering knuckle model and the bearing flange model indicates that the two are fully assembled.

[0048] Furthermore, the finite element model is simulated using finite element analysis software under preset operating conditions. These conditions include extreme steering, single-sided deep pothole crossing, washboard braking, full-stop left turn, and full-stop right turn. The loads imposed on the vehicle by each operating condition can be determined by analyzing the vehicle's load extraction report or by conducting full-vehicle tests on actual roads. The loads on the vehicle under each operating condition primarily include external forces and external torques. For example, under extreme steering and single-sided deep pothole crossing, the vehicle load is the external force acting on the tire's contact point; under washboard braking, the vehicle load is the external force and external torque acting on the tire's wheel center; and under full-stop left turn and full-stop right turn, the vehicle load is the external torque acting on the tire's wheel center. Accordingly, the components in the finite element model under each operating condition also have corresponding degrees of freedom conditions. Whether relative motion occurs between components needs to be determined based on the actual operating conditions.

[0049] Furthermore, a load corresponding to a preset working condition is applied to the finite element model. Under the load, the finite element model undergoes corresponding motion to simulate the preset working condition. Due to the movement of the components, the pressure on the contact surface between the initial steering knuckle model and the bearing flange model changes. Pressure variation data is collected from the pressure variation on the contact surface under the preset working condition. A greater pressure variation indicates a greater degree of separation between the contact surfaces of the initial steering knuckle model and the bearing flange model. The pressure variation data can be used to indicate the degree of separation between the contact surfaces of the initial steering knuckle model and the bearing flange model under the preset working condition.

[0050] It is understandable that after the preset working condition ends, the pressure on the contact surface between the initial steering knuckle model and the bearing flange model returns to the state before the preset working condition. Therefore, if it is determined that the contact surface separation phenomenon occurs during the preset working condition simulation process, the contact surface returns to the contact state from the separation state after the preset working condition ends, and because the speed of restoring contact is relatively fast, it is reflected in the actual situation as knocking between the steering knuckle and the bearing flange, resulting in abnormal noise, thereby determining the first cause of the abnormal noise generated by the steering knuckle. Furthermore, after determining the first cause, the redesign of the initial steering knuckle model is guided by the first cause, mainly by updating the contact surface of the initial steering knuckle model to reduce or eliminate the abnormal noise. Accordingly, according to actual needs, the bearing flange model can also be redesigned.

[0051] The finite element analysis method for abnormal steering knuckle noise provided in this embodiment simulates the preset working conditions on the finite element model of the vehicle's front suspension system to obtain pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model under the preset working conditions, and determines the cause and location of the abnormal steering knuckle noise based on the pressure change data, so as to update the initial steering knuckle model in a targeted manner, effectively eliminate the abnormal noise in the front suspension system, and improve the reliability of the designed front suspension system; at the same time, this method can also discover problems in advance during the design stage, effectively shorten the development cycle, and reduce development costs.

[0052] Reference Figure 2 , Figure 2 This is a step diagram for determining the contact surface separation phenomenon in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, whether the contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model is determined by the following method:

[0053] S210. Using the pressure on the contact surface after pre-tightening as a reference, detect the pressure change on the contact surface after the load is applied to obtain pressure change data.

[0054] S220. If the pressure change data exceeds a set threshold, it is determined that a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model.

[0055] Specifically, after the initial steering knuckle model and bearing flange model are pre-tightened using the bolt model, the finite element model is in its initial, unloaded state. This state is used as a baseline state for comparison with the state of the finite element model after the load is applied, thereby obtaining simulation results of the front suspension system under the preset operating conditions, including the pressure changes on the contact surface between the initial steering knuckle model and the bearing flange model. It is understood that the threshold value is set to the same value as the baseline pressure, that is, when the pressure on the contact surface between the initial steering knuckle model and the bearing flange model drops to 0, contact surface separation occurs.

[0056] For example, referring to Figure 3a , Figure 3a This is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model after the screw is pre-tightened in the embodiment of the present application. When the initial steering knuckle model and the bearing flange model are pre-tightened by the bolt model, the pressure on the contact surface gradually increases from zero until the pre-tightening is completed. Figure 3a As shown, there is a uniformly distributed pressure on the contact surface. The pressure at this time is used as a benchmark to determine the pressure change data under various working conditions.

[0057] Further, refer to Figure 3b , Figure 3b This is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the extreme steering condition in the embodiment of the present application. As shown in the figure, after applying the load corresponding to the extreme steering condition, the pressure distribution on the contact surface changes, and the contact pressure decreases at 401. The difference between the value when the pressure at 401 is reduced to the minimum and the reference pressure is calculated as the pressure change data. Figure 3b Under the working conditions shown, the pressure at 401 decreases to the minimum and takes a value of 0, that is, the value of the pressure change data is the same as the reference pressure, indicating that the contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model at this time.

[0058] Further, refer to Figures 3c to 3f , Figure 3c is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the single-side deep pit working condition in the embodiment of the present application, Figure 3d is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the washboard road braking condition in the embodiment of the present application, Figure 3e is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the working condition of turning the steering wheel in situ right in the embodiment of the present application, Figure 3fThe pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the working condition of the steering wheel turning left in place in the embodiment of the present application is shown in the figure. As shown in the figure, when simulating various preset working conditions, pressure changes appear on the contact surface between the initial steering knuckle model and the bearing flange model, indicating that there is a certain degree of separation between the two. Figure 3c 、 Figure 3e and Figure 3f It can be seen from the figure that under the conditions of single-side deep pit crossing, in-situ right-turn steering wheel turning and in-situ left-turn steering wheel turning, the contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model, and the locations where it occurs are respectively Figure 3c 402 of Figure 3e 404 and Figure 3f 405 of. Figure 3d Under the washboard road braking condition shown in the figure, although pressure changes occur on the contact surface between the initial steering knuckle model and the bearing flange model, that is, Figure 3d At 403, the pressure change data here does not exceed the set threshold, which shows that no contact surface separation occurs at this time.

[0059] As an embodiment of the present application, when contact surface separation is determined to have occurred through pressure change data, determining the primary cause of the abnormal noise generated by the steering knuckle includes:

[0060] S310. If it is determined that a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model, it is determined that the first cause is that the contact surface separation phenomenon causes a knocking noise, and the source of the abnormal noise is located on the contact surface of the initial steering knuckle model.

[0061] Specifically, after the preset working condition ends, the pressure on the contact surface between the initial steering knuckle model and the bearing flange model returns to the baseline state before the preset working condition. Therefore, if contact surface separation is determined to have occurred, the pressure on the contact surface returns to the baseline pressure after the preset working condition simulation ends, that is, the contact surface returns from a separated state to a contact state. However, the preset working condition lasts for a short time, and the repeated changes in pressure on the contact surface are reflected as knocking between the steering knuckle and the bearing flange, resulting in the abnormal knocking noise. Therefore, the primary cause is determined to be the knocking between the initial steering knuckle model and the bearing flange model caused by the contact surface separation phenomenon, resulting in the abnormal knocking noise.

[0062] Furthermore, the location of the abnormal noise source is determined based on the location where the contact surface separation occurs. It is understandable that when the knocking noise occurs, the abnormal noise source is located on the contact surface of the initial steering knuckle model, and the specific location needs to be analyzed through pressure change data. Figure 3b 、 Figure 3c 、 Figure 3e and Figure 3fIt can be seen that under the working conditions corresponding to the above figure, the locations of the abnormal noise sources are 401, 402, 404 and 405 respectively. Therefore, the location of the abnormal noise source is at the location where the contact surface separation phenomenon occurs on the contact surface of the initial steering knuckle model. From this, the cause of the abnormal noise and the location of the abnormal noise source can be determined.

[0063] Reference Figure 4 , Figure 4 This is a step diagram for processing the abnormal noise caused by the first cause in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, the method further includes:

[0064] S320. Based on the pressure change data, obtain the pressure anomaly width at the specific location where the contact surface separation phenomenon occurs.

[0065] S330. Set a noise reduction groove 406 on the contact surface of the initial steering knuckle model to obtain a slotted steering knuckle model; wherein the width of the noise reduction groove 406 is the same as the width of the pressure anomaly.

[0066] Specifically, refer to Figures 3a to 3f The contact surface where the pressure change occurs shown in the figure is the surface in contact with the bearing flange model on the initial steering knuckle model. It can be understood that the pressure abnormality width is the width of the specific location where the contact surface separation occurs along the tangential direction of the steering knuckle hole on the initial steering knuckle model. Figure 3b The first width can be obtained by Figure 3c The second width can be obtained by Figure 3e The third width can be obtained by Figure 3f The fourth width can be obtained. It can be seen that the first width, the second width and the third width are widths in the same direction, which is recorded as the first direction; the direction of the fourth width is perpendicular to the first width, the second width and the third width, which is recorded as the second direction.

[0067] Furthermore, a noise reduction groove 406 is provided on the initial steering knuckle model based on the pressure anomaly width. It is understood that the noise reduction groove 406 is a through groove in the radial direction of the steering knuckle hole, and its width is the same as the pressure anomaly width. In the same direction, the maximum pressure anomaly width is used as the width of the noise reduction groove 406. In this embodiment, the first width is used as the width of the noise reduction groove 406 in the first direction, and the fourth width is used as the width of the noise reduction groove 406 in the second direction. Based on the set widths, the noise reduction groove 406 is provided on the contact surface of the initial steering knuckle model, thereby obtaining a slotted steering knuckle model. It is understood that the depth of the noise reduction groove 406 is not specifically limited and can be determined based on actual conditions. For example, the depth of the noise reduction groove 406 can be 0.3 mm.

[0068] For example, referring to Figure 5 , Figure 5This is a pressure distribution diagram of the contact surface between the slotted steering knuckle model and the bearing flange model under extreme steering conditions in the embodiment of the present application. It should be noted that the slotted steering knuckle model and the bearing flange model are pre-tightened by the bolt model. The contact surface between the two only includes the bolt mounting hole and the surrounding part. The slotted steering knuckle model and the bearing flange model do not come into contact at the location where the noise reduction groove 406 is located. Figure 5 As shown, under extreme steering conditions, the slotted steering knuckle model and the bearing flange model perform the same movement, and the noise reduction groove 406 avoids the contact surface separation phenomenon, thereby avoiding the problem of abnormal knocking noise.

[0069] Reference Figure 6 , Figure 6 This is a step diagram for determining the second cause in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, the method further includes:

[0070] S410. Apply a load corresponding to a preset working condition to the finite element model to determine the deformation of the initial steering knuckle model and the bearing flange model respectively; wherein the deformation is used to characterize whether contact friction occurs between the initial steering knuckle model and the bearing flange model.

[0071] S420. When contact friction is determined to have occurred through the deformation, determine a second reason for the abnormal noise generated by the steering knuckle; wherein the second reason is used to guide the update of the dimensions of the initial steering knuckle model and the bearing flange model.

[0072] Specifically, after preloading, a certain gap exists between the initial steering knuckle model and the bearing flange model. The size of this gap is determined by the design dimensional tolerance of the two. During the preset working condition simulation, the initial steering knuckle model and the bearing flange model will deform under the influence of the load. If the sum of their deformation exceeds the tolerance dimensional gap, contact and friction will occur between the initial steering knuckle model and the bearing flange model, resulting in abnormal noise.

[0073] For example, the diameter of the steering knuckle hole in the initial steering knuckle model is 94mm, and the tolerance range is 94mm at the lower limit and 94.05mm at the upper limit. The diameter of the outer flange in the bearing flange model is 94mm, and the tolerance range is 93.94mm at the lower limit and 93.91mm at the upper limit. Therefore, the tolerance size gap between the two ranges from 0.06mm to 0.14mm. Figure 7 , Figure 7This is a pressure distribution diagram of the assembly surface between the initial steering knuckle model and the bearing flange model after the load is applied in the embodiment of the present application. As shown in the figure, after the load is applied, a pressure change occurs at 407 on the inner wall of the steering knuckle hole compared with the pressure distribution in the reference state. The pressure change here is caused by the deformation of the initial steering knuckle model and the bearing flange model. The deformation amounts of the two can be referred to in Table 1.

[0074] Table 1 Deformations of the initial steering knuckle model and bearing flange model

[0075]

[0076] In Table 1, Positions 1 and 2 on the initial steering knuckle model are locations on the inner wall of the knuckle hole. The line connecting Position 1 and the center of the knuckle hole is perpendicular to the line connecting Position 2 and the center of the knuckle hole. Accordingly, Positions 1 and 2 on the bearing flange model correspond to Positions 1 and 2 on the initial steering knuckle model. As can be seen from Table 1, under the single-sided deep pit condition, the sum of the deformations of the initial steering knuckle model and the bearing flange model exceeds the tolerance clearance, indicating contact friction at position 407, resulting in abnormal friction noise.

[0077] As an embodiment of the present application, when contact friction is determined to occur based on the deformation, determining the second cause of the abnormal noise generated by the steering knuckle includes:

[0078] S422. If it is determined that contact friction occurs between the initial steering knuckle model and the bearing flange model, the second cause is determined to be that contact friction occurs between the initial steering knuckle model and the bearing flange model, resulting in abnormal friction noise, and the source of the abnormal noise is located at the position where the initial steering knuckle model and the bearing flange model contact due to deformation.

[0079] Specifically, if the sum of the deformations of the initial steering knuckle model and the bearing flange model exceeds the tolerance size gap, the initial steering knuckle model and the bearing flange model will come into contact due to deformation, and friction will be generated between the two under the preset working conditions, resulting in abnormal friction noise. For example, if Figure 7 As shown, Figure 7 Point 407 is the location where the initial steering knuckle model and the bearing flange model come into contact due to deformation. At this time, the contact surfaces of the two creep at point 407, causing friction and generating abnormal friction noise, and the location of the abnormal noise source is at point 407.

[0080] Reference Figure 8 , Figure 8 This is a step diagram for processing the abnormal noise caused by the second reason in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, the method further includes:

[0081] S430. Determine a dimensional deviation between the initial steering knuckle model and the bearing flange model based on the deformation amounts of the initial steering knuckle model and the bearing flange model.

[0082] S440. Modify the design data of the bearing flange model according to the dimensional deviation to obtain a new dimensional bearing flange model.

[0083] Specifically, the initial steering knuckle model and bearing flange model dimensions were modified to prevent contact friction between them when producing the same deformation. For example, the bearing flange model dimensions were updated to a new dimension, resulting in an outer flange diameter of 94 mm, with a tolerance range of 93.92 mm at the lower limit and 93.88 mm at the upper limit. The slotted steering knuckle model and the new dimension bearing flange model were assembled using a preloaded bolt model and simulated under pre-set operating conditions. The deformations of the slotted steering knuckle and new dimension bearing flange models can be found in Table 2.

[0084] Table 2 Deformation of slotted steering knuckle model and new size bearing flange model

[0085]

[0086] Table 2 shows that under the unilateral deep pit condition, the sum of the deformation variables of the slotted steering knuckle model and the new-size bearing flange model is the same as before the update. At this time, the tolerance size gap ranges from 0.08 mm to 0.17 mm, and the sum of the deformation variables does not exceed the tolerance size gap. Therefore, no contact friction occurs between the slotted steering knuckle model and the new-size bearing flange model, avoiding the generation of abnormal friction noise.

[0087] Reference Figure 9 , Figure 9 This is a step diagram for establishing a finite element model of a front suspension system in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, establishing a finite element model of a front suspension system includes:

[0088] S110. Perform finite element modeling of the front suspension system based on the design data of the front suspension system to obtain a system model.

[0089] S120. Perform finite element modeling on the tire connected to the front suspension system to obtain a tire model.

[0090] S130. Setting connection constraints between the system model and the tire model to connect the system model and the tire model to obtain a finite element model.

[0091] Specifically, when building the finite element model of the front suspension system, all parts of the front suspension system are modeled and assembled. Furthermore, the tire connected to the front suspension system is modeled to create a tire model. During the simulation of a preset operating condition, the load corresponding to the preset operating condition is applied to the tire model, and this load is transferred to the front suspension system.

[0092] Reference Figure 10 , Figure 10 A schematic diagram of the finite element model provided in this embodiment of the present application is shown. The system model and the tire model are connected by setting connection constraints on multiple hard points. For example, the connection relationship between the left front suspension system hard points and the constraint hard points can be found in Table 3.

[0093] Table 3 Connection relationship between the hard points and constraint hard points of the left front suspension system

[0094]

[0095]

[0096] The hard points marked with "copy" in Table 3 are constraint hard points and correspond to the hard points in the front suspension system. For example, when simulating extreme cornering conditions, single-sided deep pothole conditions, washboard braking conditions, stationary left-hand steering conditions, and stationary right-hand steering conditions, the load is applied to hard points RP12. Furthermore, when simulating forward emergency braking conditions, the load is applied to hard points RP12, RP13, and RP14. For these conditions, RP1 is the selected tire model anchor point.

[0097] Accordingly, please refer to Figure 11 The embodiment of the present application provides a finite element analysis device for abnormal noise of a steering knuckle, the device comprising:

[0098] The model building module 100 is used to build a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, and the initial steering knuckle model and the bearing flange model are pre-tightened together by a bolt model.

[0099] The first load simulation module 200 is used to apply a load corresponding to a preset working condition to the finite element model to determine the pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model; wherein the pressure change data is used to characterize whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model.

[0100] The first abnormal noise analysis module 300 is used to determine the first cause of the abnormal noise generated by the steering knuckle when the contact surface separation phenomenon is determined to have occurred through the pressure change data; wherein the first cause is used to guide the update of the contact surface of the initial steering knuckle model.

[0101] In some optional embodiments, the first load simulation module 200 includes:

[0102] The surface pressure detection unit is used to detect the pressure change on the contact surface after the load is applied, using the pressure on the contact surface after pre-tightening as a reference, and obtain pressure change data.

[0103] The separation judgment unit is used to determine that a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model if the pressure change data exceeds a set threshold.

[0104] In some optional implementations, the first abnormal sound analysis module 300 includes:

[0105] The first cause judgment unit is used to judge the cause of the abnormal noise and the location of the abnormal noise source. If it is determined that the contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model, it is determined that the first cause is the contact surface separation phenomenon causing the knocking noise, and the abnormal noise source is located on the contact surface of the initial steering knuckle model.

[0106] In some optional embodiments, the device further includes a first abnormal sound processing module, which includes:

[0107] The first size determining unit is configured to obtain the pressure anomaly width at a specific location where the contact surface separation phenomenon occurs based on the pressure change data.

[0108] The first abnormal noise processing unit is used to set a noise reduction groove 406 on the contact surface of the initial steering knuckle model to obtain a slotted steering knuckle model; wherein the width of the noise reduction groove 406 is the same as the width of the pressure anomaly.

[0109] In some optional embodiments, the device further comprises:

[0110] The second load simulation module is used to apply the load corresponding to the preset working condition to the finite element model to determine the deformation of the initial steering knuckle model and the bearing flange model respectively; wherein the deformation is used to indicate whether contact friction occurs between the initial steering knuckle model and the bearing flange model.

[0111] The second abnormal noise analysis module is used to determine the second cause of the abnormal noise generated by the steering knuckle when the contact friction phenomenon is determined by the deformation variable; wherein the second cause is used to guide the update of the dimensions of the initial steering knuckle model and the bearing flange model.

[0112] In some optional implementations, the second abnormal sound analysis module includes:

[0113] The second cause judgment unit is used to judge the cause of the abnormal noise and the location of the abnormal noise source. If it is determined that contact friction occurs between the initial steering knuckle model and the bearing flange model, the second cause is determined to be the contact friction between the initial steering knuckle model and the bearing flange model, resulting in the friction abnormal noise, and the abnormal noise source is located at the position where the initial steering knuckle model and the bearing flange model contact due to deformation.

[0114] In some optional embodiments, the device further includes a second abnormal sound processing module, which includes:

[0115] The second size determination unit is used to determine the size deviation between the initial steering knuckle model and the bearing flange model according to the deformation amounts of the initial steering knuckle model and the bearing flange model.

[0116] The second abnormal sound processing unit is used to modify the design data of the bearing flange model according to the size deviation to obtain a new size bearing flange model.

[0117] In some optional implementations, the model building module 100 includes:

[0118] The system modeling unit is used to perform finite element modeling on the front suspension system according to the design data of the front suspension system to obtain a system model.

[0119] The tire modeling unit is used to perform finite element modeling on the tire connected to the front suspension system to obtain a tire model.

[0120] The model connection unit is used to set connection constraints between the system model and the tire model to connect the system model and the tire model to obtain a finite element model.

[0121] 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.

[0122] The steering knuckle abnormal noise finite element 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, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0123] See also Figure 12 , Figure 121 is a structural diagram of a computer device provided by an embodiment of the present application. As shown in the figure, 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. The 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 graphical information of a GUI on an external input / output device (such as a display device coupled to an interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and 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 12 A processor 10 is taken as an example.

[0124] 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 an application-specific 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.

[0125] The memory 20 stores instructions that can be executed by at least one processor 10, so as to enable at least one processor 10 to execute the method shown in the above embodiment.

[0126] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created based on 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 located 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.

[0127] 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.

[0128] The computer device further includes a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0129] The embodiments of the present application also provide a computer-readable storage medium. The above-mentioned method according to the embodiment of the present application can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and downloaded through a network and will be stored in a local storage medium, 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 drive, etc.; further, the storage medium can also include a combination of the above-mentioned types of memory. 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.

[0130] An embodiment of the present application provides a computer program product, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform a method according to any embodiment of the present application.

[0131] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

[0132] It is understandable that before using the technical solutions disclosed in the various embodiments of this disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved in this disclosure should be informed to the user and the user's authorization should be obtained in an appropriate manner in accordance with relevant laws and regulations.

[0133] For example, in response to a user's active request, a prompt message is sent to the user to clearly inform the user that the operation requested will require the acquisition and use of the user's personal information. This allows the user to independently choose whether to provide personal information to the electronic device, application, server, storage medium, or other software or hardware that performs the operations of the disclosed technical solution based on the prompt message.

[0134] As an optional but non-limiting implementation, in response to receiving a user's active request, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. Furthermore, the pop-up window may also contain a selection control for the user to select "agree" or "disagree" to provide personal information to the electronic device.

[0135] It is understandable that the above notification and user authorization process are merely illustrative and do not limit the implementation of the present disclosure. Other methods that comply with relevant laws and regulations may also be applied to the implementation of the present disclosure.

[0136] It is understandable that the data involved in this technical solution (including but not limited to the data itself, the acquisition or use of the data) must comply with the requirements of relevant laws, regulations and relevant provisions.

[0137] It is understandable that in the specific implementation of this application, related data such as user information, location information, navigation data, etc. are involved. When the above embodiments of this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of relevant data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0138] The systems, devices, modules, or units described in the above embodiments may be implemented by computer chips or entities, or by products having certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0139] For the convenience of description, the above devices are described as being divided into various units according to their functions. Of course, when implementing this application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0140] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0141] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0142] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0143] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0144] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0145] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0146] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

[0147] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A finite element analysis method for abnormal noise of steering knuckle, characterized in that: The method comprises: Establishing a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, and the initial steering knuckle model and the bearing flange model are pre-tightened together by a bolt model; Applying a load corresponding to a preset working condition to the finite element model to determine pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model; specifically, using the pressure on the contact surface after preload as a reference, detecting the pressure change on the contact surface after the load is applied to obtain the pressure change data; wherein the pressure change data is used to indicate whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model; if the pressure change data exceeds a set threshold, it is determined that a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model; When it is determined through the pressure change data that the contact surface separation phenomenon has occurred, the first cause of the abnormal noise generated by the steering knuckle is determined; specifically, if it is determined that the contact surface separation phenomenon has occurred between the initial steering knuckle model and the bearing flange model, it is determined that the first cause is that the contact surface separation phenomenon causes the abnormal knocking noise, and the source of the abnormal noise is located on the contact surface of the initial steering knuckle model; wherein, the first cause is used to guide the update of the contact surface of the initial steering knuckle model.

2. The method according to claim 1, characterized in that The method further comprises: Obtaining, based on the pressure change data, a pressure anomaly width at a specific location where the contact surface separation phenomenon occurs; A noise reduction groove is provided on the contact surface of the initial steering knuckle model to obtain a slotted steering knuckle model; wherein the width of the noise reduction groove is the same as the width of the pressure anomaly.

3. The method according to claim 1 or 2, characterized in that The method further comprises: Applying a load corresponding to a preset working condition to the finite element model to determine deformations of the initial steering knuckle model and the bearing flange model, respectively; wherein the deformations are used to indicate whether contact friction occurs between the initial steering knuckle model and the bearing flange model; When the contact friction phenomenon is determined to have occurred through the deformation amount, a second reason for the abnormal noise generated by the steering knuckle is determined; wherein the second reason is used to guide the update of the dimensions of the initial steering knuckle model and the bearing flange model.

4. The method according to claim 3, characterized in that When the occurrence of the contact friction phenomenon is determined by the deformation amount, determining a second cause of the abnormal noise generated by the steering knuckle includes: If it is determined that contact friction occurs between the initial steering knuckle model and the bearing flange model, the second cause is determined to be that contact friction occurs between the initial steering knuckle model and the bearing flange model, resulting in abnormal friction noise, and the source of the abnormal noise is located at the position where the initial steering knuckle model and the bearing flange model contact due to deformation.

5. The method according to claim 4, characterized in that The method further comprises: determining a dimensional deviation between the initial steering knuckle model and the bearing flange model according to the deformation amounts of the initial steering knuckle model and the bearing flange model; According to the dimensional deviation, the design data of the bearing flange model is modified to obtain a bearing flange model with a new size.

6. The method according to claim 1, characterized in that The establishing of the finite element model of the front suspension system includes: Performing finite element modeling on the front suspension system according to the design data of the front suspension system to obtain a system model; Performing finite element modeling on a tire connected to the front suspension system to obtain a tire model; A connection constraint is set between the system model and the tire model to connect the system model and the tire model to obtain the finite element model.

7. A finite element analysis device for abnormal noise of steering knuckle, characterized in that: The device comprises: A model building module, configured to build a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, wherein the initial steering knuckle model and the bearing flange model are pre-tightened together by a bolt model; a first load simulation module, configured to apply a load corresponding to a preset working condition to the finite element model to determine pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model; specifically, using the pressure on the contact surface after preload as a reference, detecting the pressure change on the contact surface after the load is applied to obtain the pressure change data; wherein the pressure change data is used to indicate whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model; if the pressure change data exceeds a set threshold, it is determined that a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model; The first abnormal noise analysis module is used to determine the first cause of the abnormal noise generated by the steering knuckle when it is determined through the pressure change data that the contact surface separation phenomenon has occurred; specifically, if it is determined that the contact surface separation phenomenon has occurred between the initial steering knuckle model and the bearing flange model, it is determined that the first cause is the knocking noise caused by the contact surface separation phenomenon, and the source of the abnormal noise is located on the contact surface of the initial steering knuckle model; wherein, the first cause is used to guide the update of the contact surface of the initial steering knuckle model.

8. 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 method according to any one of claims 1 to 6 by executing the computer instructions.

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