Shock absorber, vehicle performance analysis method and device and storage medium

Abstract

The invention discloses a shock absorber, a vehicle performance analysis method and device and a storage medium, which can improve the accuracy of shock absorber performance analysis, and the method comprises the following steps: pre-constructing a shock absorber model corresponding to a target shock absorber, the shock absorber model comprises a shock absorber sleeve, a piston rod, a piston, a support, a support connecting piece and a piston connecting piece, the piston rod is connected with the piston through the piston connecting piece, the geometric center of the piston is located on the axis of the shock absorber sleeve, and the piston connecting piece is arranged on the shock absorber support. The axis of the piston rod is restrained to pass through the geometric center of the shock absorber support all the time, and the shock absorber support is connected with the shock absorber sleeve through the support connecting piece. Obtaining structural parameters of the shock absorber model; and determining the performance of the target shock absorber according to the structural parameters.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a shock absorber, a vehicle performance analysis method, a device and a storage medium. Background Art

[0002] Automobile comfort is receiving more and more attention, and shock absorbers are important components that affect automobile comfort. Therefore, when designing shock absorbers, it is very necessary to conduct a comprehensive analysis of their internal structure and its forces.

[0003] At present, OEMs use a simple structure shock absorber model for analysis when designing and evaluating shock absorber performance. However, this model can only reflect the impact of damping force on performance, but cannot accurately reflect the position, force, deformation, friction of the shock absorber piston and the force at the shock absorber sleeve support during vehicle movement, resulting in reduced accuracy of vehicle performance analysis.

[0004] It can be seen that the traditional solution reduces the accuracy of shock absorber performance analysis. Summary of the invention

[0005] The present invention provides a shock absorber, a vehicle performance analysis method, a device and a storage medium to solve the technical problem of reduced accuracy of shock absorber performance analysis in traditional solutions.

[0006] In a first aspect, a shock absorber performance analysis method is provided, comprising:

[0007] Pre-constructing a shock absorber model corresponding to a target shock absorber, the shock absorber model comprising a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector, the piston rod and the piston are connected by the piston connector, the geometric center of the piston is located on the axis of the shock absorber sleeve, at the shock absorber support position, the axis of the piston rod is constrained to always pass through the geometric center of the shock absorber support, and the shock absorber support and the shock absorber sleeve are connected by the support connector;

[0008] Acquiring structural parameters of the shock absorber model;

[0009] The performance of the target shock absorber is determined according to the structural parameters.

[0010] Furthermore, the piston connector includes a piston bushing, and the piston rod and the piston are connected by the piston bushing.

[0011] Furthermore, the shock absorber support and the shock absorber sleeve are connected by the support bushing.

[0012] Furthermore, the shock absorber model comprises a shock absorber outer cylinder and a shock absorber inner cylinder, and the shock absorber support is connected to the shock absorber outer cylinder by the support connector.

[0013] Further, calculating the performance parameters of the target shock absorber according to the structural parameters includes:

[0014] Calculating target stiffness parameters of the shock absorber model according to the structural parameters, wherein the target stiffness parameters include at least one or more of the following stiffness parameters: equivalent stiffness at the piston, torsional stiffness and equivalent stiffness of the support;

[0015] The target shock absorber performance is determined according to the target stiffness parameter.

[0016] Further, the calculating the target stiffness parameter of the shock absorber model according to the structural parameter includes:

[0017] Decomposing the shock absorber model into a plurality of decomposed parts;

[0018] Using the structural parameters respectively, calculating the deformation of the stress point caused by each of the decomposed parts;

[0019] The deformation amounts of the force bearing points caused by the decomposed parts are correspondingly superimposed to obtain the deformation amounts of the support and the deformation amounts of the piston;

[0020] The target stiffness parameter of the shock absorber model is calculated according to the deformation of the support and the deformation of the piston.

[0021] Further, determining the performance of the target shock absorber according to the target stiffness parameter includes:

[0022] Acquiring stiffness test result data of the target shock absorber;

[0023] According to the stiffness test result data, the target stiffness parameter is corrected;

[0024] The performance of the target shock absorber is determined according to the corrected target stiffness parameter.

[0025] In a second aspect, a vehicle simulation analysis method is provided, the method comprising:

[0026] Pre-constructing a shock absorber model corresponding to a target shock absorber, the shock absorber model comprising a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector, the piston rod and the piston are connected by the piston connector, the geometric center of the piston is located on the axis of the shock absorber sleeve, at the shock absorber support position, the axis of the piston rod is constrained to always pass through the geometric center of the shock absorber support, and the shock absorber support and the shock absorber sleeve are connected by the support connector;

[0027] Based on the shock absorber model, a simulation analysis is performed on the vehicle to obtain a simulation result of the vehicle.

[0028] In a third aspect, a shock absorber performance analysis device is provided, the device comprising:

[0029] A construction module is used to pre-construct a shock absorber model corresponding to a target shock absorber, wherein the shock absorber model comprises a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector, wherein the piston rod is connected to the piston by the piston connector, the geometric center of the piston is located on the axis of the shock absorber sleeve, and at the shock absorber support position, the axis of the piston rod is constrained to always pass through the geometric center of the shock absorber support, and the shock absorber support is connected to the shock absorber sleeve by the support connector;

[0030] The analysis module is used to obtain the structural parameters of the shock absorber model and determine the performance of the target shock absorber according to the structural parameters.

[0031] In a fourth aspect, a computer device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the vehicle simulation analysis or shock absorber performance analysis method as described in any one of the above items are implemented.

[0032] In a fifth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the vehicle simulation analysis or shock absorber performance analysis method as described in any of the above items are implemented.

[0033] In one of the solutions provided above, after the shock absorber model is constructed, the shock absorber model includes a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector. The piston connector can reflect the deformation of the piston seal and the piston rod. The shock absorber support is connected to the shock absorber sleeve with a support connector. The support connector can reflect the flexible deformation of the shock absorber cylinder. Therefore, the force position, size and movement mode of the shock absorber can be consistent with the actual situation. Therefore, the performance of the target shock absorber can be accurately determined based on the structural parameters of the shock absorber model, thereby improving the accuracy of the shock absorber performance analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 It is a comparison diagram between the traditional shock absorber model and the actual shock absorber structure;

[0036] Figure 2 is a schematic diagram of a model structure of a shock absorber model in one embodiment of the present invention;

[0037] Figure 3 yes Figure 2 An enlarged schematic diagram of a piston position structure of a shock absorber model;

[0038] Figure 4 It is a schematic diagram of a flow chart of a shock absorber performance analysis method in one embodiment of the present invention;

[0039] Figure 5 It is a calculation schematic diagram of a decomposition calculation principle of a stiffness calculation in one embodiment of the present invention;

[0040] Figure 6 is a simplified force diagram of a piston rod in one embodiment of the present invention;

[0041] Figure 7 is a simplified force diagram of the inner cylinder of the shock absorber in one embodiment of the present invention;

[0042] Figure 8 is a simplified force diagram of the outer cylinder of the shock absorber in one embodiment of the present invention;

[0043] Fig. 9 It is a schematic diagram of a flow chart of a shock absorber performance analysis method in one embodiment of the present invention;

[0044] Fig.10 It is a structural schematic diagram of a computer device in one embodiment of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The embodiments of the present application mainly provide a shock absorber performance analysis method and a vehicle simulation analysis method. The above methods are implemented based on a new shock absorber model provided by the present application. To facilitate the understanding of the present application, the new shock absorber model provided by the embodiments of the present application is first introduced here.

[0047] It should be understood that the conventional shock absorber generally has a very simple structure, such as Figure 1 As shown, Figure 1 The left picture shows the traditional shock absorber model before improvement. Figure 1 The picture on the right is the actual shock absorber structure. In the actual shock absorber structure, the shock absorber includes components such as a piston rod and a piston. In this type of traditional shock absorber model, the rigid rod at the upper end is constrained to move and rotate along the axis of the rigid rod below. However, there is no piston in the shock absorber model structure, and the shock absorber does not deform when it is stressed, resulting in the inability to reflect the actual bending stiffness deformation of the shock absorber. Therefore, when using the shock absorber model for performance analysis, there will be obvious errors. The most ideal shock absorber model should use a detailed finite element model. Then, this will increase the complexity of the vehicle model, low efficiency, difficulty in meeting the development schedule, and high cost.

[0048] Based on the above reasons, the embodiment of the present application provides a new shock absorber model, which is an improved shock absorber model, such as Figure 2 and Figure 3 As shown, Figure 2 A schematic diagram of the structure of a shock absorber model provided in an embodiment of the present application, Figure 3 A schematic diagram of the piston structure of a shock absorber model provided in an embodiment of the present application shows that the shock absorber model includes a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector. The geometric center of the piston is located on the axis of the shock absorber sleeve, so that the piston can move and rotate along the axis of the shock absorber sleeve. The piston rod is connected to the piston by a piston connector, through which the deformation of the piston seal and the piston rod can be reflected. At the shock absorber support position, the axis of the piston rod is constrained to always pass through the geometric center of the shock absorber support, so that the piston rod can move and rotate. The shock absorber support is connected to the shock absorber sleeve by a support connector, through which the flexible deformation of the shock absorber cylinder can be reflected. It can be seen that the piston rod can slide up and down along the shock absorber sleeve and rotate around its own axis under the constraints of the upper and lower positions. The piston and the piston rod are respectively subjected to the forces of the shock absorber sleeve and the support. Therefore, the force position, size and movement mode of the shock absorber can be consistent with the actual situation. Based on this shock absorber model, it can be applied to applications such as vehicle simulation analysis and shock absorber performance analysis.

[0049] In one embodiment, the piston connector includes a piston bushing, and the piston rod and the piston are connected by the piston bushing. In this embodiment, in the model structure, the piston connector is directly implemented in the form of a bushing, which is in line with the structural design of a general shock absorber, so that the shock absorber is close to the actual structural form, thereby improving the rationality of the shock absorber model. The piston connector can also be modeled using other connection structures of the piston rod and the piston, such as a pin connection form, which is not specifically limited.

[0050] In one embodiment, the shock absorber support and the shock absorber sleeve are connected by a support bushing. In this embodiment, the support connector in the model structure is directly implemented in the form of a bushing, which conforms to the structural design of the actual general shock absorber, making the shock absorber close to the actual structural form, and also improving the structural rationality of the shock absorber model. Similarly, the support connector can also be modeled in other connection forms, which are not specifically limited.

[0051] It should be noted that in the embodiment of the present application, the shock absorber model is modeled in the form of a bushing, which can simplify the stiffness estimation method of the model bushing, thereby simplifying the modeling process and stiffness parameter calculation, and is also conducive to improving the efficiency of using the shock absorber model.

[0052] In one embodiment, the shock absorber model includes a shock absorber outer cylinder and a shock absorber inner cylinder. In this case, the shock absorber support is connected to the shock absorber outer cylinder by a support connector. For example, the shock absorber support is connected to the shock absorber outer cylinder by a support piston. In this embodiment, the shock absorber model can be a double-tube shock absorber model. Exemplarily, the shock absorber model can be a model of a shock absorber corresponding to a McPherson suspension. The McPherson suspension is a form of vehicle suspension. However, the shock absorber model in the embodiment of the present application is not limited to the shock absorber used in such a suspension, and is not specifically limited. It is worth noting that for the McPherson suspension, since its shock absorber will be subjected to obvious lateral force, and during the movement of the vehicle, the force on the shock absorber will change with the change of the piston position, the force and deformation of the shock absorber affect the contact between the tire and the ground, and thus have a greater impact on the performance of the shock absorber. In view of this situation, the shock absorber structure and the corresponding model provided by the present application can also accurately reflect this change. Therefore, the application of the shock absorber model provided in the embodiment of the present application has obvious advantages in improving the suspension performance design, especially the McPherson suspension. The application method provided by the present invention is described in detail through various embodiments below.

[0053] See also Figure 4 As shown, in one embodiment, a shock absorber performance analysis method is provided, which mainly includes the following steps:

[0054] S10: Pre-constructing a shock absorber model corresponding to the target shock absorber.

[0055] See also Figure 2 As shown, in this embodiment, when performing shock absorber performance analysis, it is necessary to first construct a shock absorber model corresponding to the target shock absorber, wherein the target shock absorber is also the shock absorber to be subjected to performance analysis. Exemplarily, the target shock absorber includes a shock absorber in a McPherson suspension or a shock absorber of other suspension types, without specific limitation.

[0056] Among them, the constructed shock absorber model is different from the traditional shock absorber model with a simple structure. In this embodiment, the shock absorber model includes a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector. The geometric center of the piston is located on the axis of the shock absorber sleeve, so that the piston can move and rotate along the axis of the shock absorber sleeve. The piston rod is connected to the piston by a piston connector, and the deformation of the piston seal and the piston rod can be reflected through the piston connector. At the shock absorber support position, the axis of the piston rod is constrained to always pass through the shock absorber support. The geometric center of the seat allows the piston rod to move and rotate. The shock absorber support and the shock absorber sleeve are connected with a support connector, and the flexible deformation of the shock absorber cylinder can be reflected through the support connector. It can be seen that the piston rod can slide up and down along the shock absorber sleeve and rotate around its own axis under the constraints of the upper and lower positions. The piston and the piston rod are respectively subjected to the forces of the shock absorber sleeve and the support. Therefore, the force position, size, and movement mode of the shock absorber can be consistent with the actual situation. Therefore, based on this shock absorber model, it can be applied to shock absorber performance analysis applications.

[0057] As an example, the piston connector includes a piston bushing, and the piston rod and the piston are connected by the piston bushing. In this embodiment, the piston connector is directly implemented in the form of a bushing, which is in line with the structural design of a general shock absorber, so that the shock absorber is close to the actual structural form, thereby improving the rationality of the shock absorber model. The piston connector can also be modeled using other connection structures between the piston rod and the piston, such as a pin connection form, which is not specifically limited.

[0058] As an example, the shock absorber support and the shock absorber sleeve are connected by a support bushing. In this embodiment, the support connector is directly implemented in the form of a bushing, which conforms to the structural design of the actual general shock absorber, making the shock absorber close to the actual structural form, and also improving the structural rationality of the shock absorber model. Similarly, the support connector can also be modeled in other connection forms, which are not specifically limited.

[0059] S20: Obtain structural parameters of the shock absorber model.

[0060] S30: Determine the performance of the target shock absorber according to the structural parameters.

[0061] After the shock absorber model is constructed, since the shock absorber model can make the force position, size, and movement mode of the shock absorber consistent with the actual situation, the performance of the target shock absorber can be determined based on the structural parameters of the shock absorber model, which is used for the subsequent structural optimization design of the target shock absorber.

[0062] Specifically, in step S30, the performance parameters of the target shock absorber are calculated according to the structural parameters, including:

[0063] S31: Calculating target stiffness parameters of the shock absorber model according to the structural parameters, where the target stiffness parameters include at least one or more of the following stiffness parameters: equivalent stiffness at the piston, torsional stiffness of the support, and equivalent stiffness;

[0064] S32: Determine the performance of the target shock absorber according to the target stiffness parameter.

[0065] In this embodiment, the target stiffness parameters of the shock absorber model can be calculated through the structural parameters of the model, including at least one or more of the following stiffness parameters: equivalent stiffness at the piston, torsional stiffness of the support and equivalent stiffness. It should be understood that these stiffness parameters reflect the force position, size and movement mode of the shock absorber, and reflect the influence of the deformation of the piston inside the shock absorber on the performance of the shock absorber, so that the performance of the shock absorber can be determined through these stiffness parameters. After experimental verification, especially for the McPherson suspension, the shock absorber model of this structure can accurately reflect the changes of the shock absorber, which is conducive to the performance analysis of the shock absorber, and provides a basis for optimizing the shock absorber structure, and has high practicality.

[0066] It is also worth noting that, in one embodiment, based on the shock absorber model provided in the embodiment of the present application, the calculation process of the stiffness parameter is simplified to improve the processing efficiency. Specifically, in step S31, that is, according to the structural parameters, the target stiffness parameter of the shock absorber model is calculated, including:

[0067] S311: Decompose the shock absorber model into multiple decomposition parts;

[0068] S312: using the structural parameters respectively, calculating the deformation of the stress point caused by each decomposed part;

[0069] S313: Correspondingly superimposing the deformation of the force bearing point caused by each decomposed part to obtain the deformation of the support and the deformation of the piston;

[0070] S313: Calculate the target stiffness parameter of the shock absorber model according to the deformation of the support and the deformation of the piston.

[0071] It should be understood that in order to simplify the modeling operation process, the embodiment of the present application adopts a simplified processing method of segmented modeling. Figure 5 As shown, Figure 5 This is a schematic diagram of the bending stiffness calculation principle. The superposition algorithm of structural deformation is used to simplify the operation. Taking a simply supported beam as an example, the idea of ​​segmented calculation is first described. Figure 5In the figure, the simply supported beam can be decomposed into two sections for superposition when subjected to force F. In the first step, when L1 is assumed to be completely rigid, L2 is considered to be a cantilever beam, and the angular displacement is w1. In the second step, when L2 is assumed to be completely rigid, according to the equivalent moment of F, the angular displacement of the B end caused by the bending of L1 is w2. Then the total angular displacement w of the entire simply supported beam at the B end is the superposition of w1 and w2.

[0072] Based on this segmented calculation method, the present embodiment also adopts a segmented method when calculating the stiffness of the shock absorber model. Specifically:

[0073] First, decompose the shock absorber model into multiple decomposed parts. As an example, simplify the shock absorber model into four parts: piston, piston rod, shock absorber inner cylinder and shock absorber outer cylinder. Then use the structural parameters of the shock absorber model to calculate the deformation of the force points caused by each decomposed part, and superimpose the deformation of the force points caused by each decomposed part to obtain the deformation of the support and the deformation of the piston. The target stiffness parameters of the shock absorber model are calculated through the deformation of the support and the deformation of the piston. The following takes the piston, piston rod, shock absorber inner cylinder and shock absorber outer cylinder as an example to describe the simplified calculation process of each part:

[0074] 1) Deformation caused by the piston

[0075] In this embodiment, the deformation caused by the piston can be directly calculated from the known piston stiffness at the location of the piston in the following manner: Among them, f represents the deformation at the location of the piston, K represents the piston stiffness, and F represents the force at the location of the piston (which can also be understood as stress).

[0076] 2) Simplified calculation of end deflection caused by piston rod

[0077] When the other three parts (piston, shock absorber inner tube and shock absorber outer tube) other than the piston rod are set to be completely rigid, such as Figure 6 As shown in the figure, the piston rod is simplified as a simply supported beam with one end fixed (point A) and the middle contacting the shock absorber inner cylinder (point B) as a fulcrum. The upper end point of the piston rod (point C) is subjected to a unit force F1. Then, under the action of this unit force, the deflection of the C end point can be calculated according to the material mechanics calculation formula as follows:

[0078]

[0079] Among them, y cF1 represents the deflection of end point C, F1 represents the force at end point C, E represents the elastic modulus of the piston rod, I represents the section moment of inertia of the piston rod, l represents the length of the piston rod, and a represents the distance from point A to point B.

[0080] 3) Simplified calculation of end deflection caused by the inner cylinder of the shock absorber

[0081] When the other three parts (piston, piston rod and shock absorber outer tube) other than the shock absorber inner tube are set to be completely rigid, such as Figure 7 As shown in the figure, the shock absorber inner cylinder is simplified as the lower end of the shock absorber inner cylinder is fixed (point A), the contact point between the upper end of the inner cylinder and the piston rod is used as a fulcrum (point B), and a simply supported beam is subjected to a force F transmitted from the piston rod through the piston at the position of the piston. Under the action of this pressure F, the deflection at the force point can be calculated according to the following material mechanics calculation formula:

[0082]

[0083] 4) Simplified calculation of end deflection caused by the inner tube of the shock absorber

[0084] When the other three parts (piston, piston rod and shock absorber inner tube) other than the shock absorber outer tube are set to be completely rigid, such as Figure 8 As shown in the figure, the shock absorber outer cylinder is simplified to a fixed lower end of the shock absorber outer cylinder (point A). At this time, the upper end of the shock absorber outer cylinder is subjected to a cantilever beam with a pressure F transmitted by the piston rod through the shock absorber inner cylinder. Then the deflection at the force point B under this pressure can be calculated according to the following material mechanics calculation formula:

[0085]

[0086] Where l is the distance between point A and point B.

[0087] Therefore, please refer to Figure 1 As shown in the figure on the right, the equivalent stiffness K of the piston in the shock absorber model p =F p / (f F +f), torsional stiffness K of the support θ =F*Lext / (y cF1 / Lext), equivalent stiffness K of the support s =F s / f B , where F p Indicates the force on the piston, F is the force at the upper end of the piston rod, F s is the force on the support, satisfying F=F p +F s ; F*Lext=F p *The meanings of A, Lext and A are as follows Figure 1 As shown in the picture on the right.

[0088] It can be seen that during the calculation, the stiffness estimation process requires the following design parameters as input, the coordinates of the upper end point of the piston, the coordinates of the piston rod guide point, the coordinates of the piston position point, the coordinates of the bottom end point of the shock absorber tube, the outer diameter of the piston rod, the inner diameter of the piston rod, the outer diameter of the shock absorber inner tube, the inner diameter of the shock absorber inner tube, the outer diameter of the shock absorber outer tube and the inner diameter of the shock absorber outer tube. Through these coordinates and the relationship between the inner and outer diameters, the required distance or length relationship can be calculated; it also includes the piston stiffness and elastic modulus, which are used to calculate the deformation in the material mechanics calculation formula. The above parameters are imported into the shock absorber model to participate in the above simplified calculation process.

[0089] It should be noted that in this simplified calculation example, the piston, piston rod, shock absorber inner tube and shock absorber outer tube are used as examples to illustrate the simplification process. When it is not a double-tube shock absorber, the simplified calculation principle is similar, and the details are not described here one by one.

[0090] Furthermore, the content of the simplified calculation may also be added or deleted according to the requirements of the shock absorber performance analysis, without any specific limitation.

[0091] It can be seen that in this embodiment, a simplified calculation method for the target stiffness parameters of the shock absorber is provided, which simplifies the modeling calculation process and can effectively calculate the required stiffness parameters. These stiffness parameters can be used to analyze the influence of the deformation, friction and damping force of the internal piston of the shock absorber on the performance of the shock absorber, thereby quickly and accurately determining the performance of the shock absorber based on these stiffness parameters with high efficiency.

[0092] It should be noted that, in order to further improve the accuracy, in step S313, the performance of the target shock absorber is determined according to the target stiffness, including:

[0093] S3131: Obtaining stiffness test result data of the target shock absorber;

[0094] S3132: Correct the target stiffness parameter according to the stiffness test result data;

[0095] S3133: Determine the performance of the target shock absorber according to the corrected target stiffness parameter.

[0096] In this embodiment, in order to further improve the accuracy of the shock absorber performance analysis, after calculating the target stiffness parameters according to the shock absorber model, the calculated target stiffness parameters are corrected using the stiffness test result data of the target shock absorber to obtain the corrected target stiffness parameters, and finally the corrected target stiffness parameters are used to determine the performance of the target shock absorber. Exemplarily, the above-mentioned modifications include, for example, if the calculated values ​​of some stiffness parameters differ too much from the test values, it means that there is an error, and then this part of the value is discarded, and if the difference is not particularly large, then the average is taken, etc. There is no specific limitation.

[0097] In this embodiment, by correcting the test data, the accuracy and effectiveness of the determined shock absorber performance analysis results can be further guaranteed, which is also beneficial to correcting the shock absorber model and improving the efficiency of subsequent performance analysis.

[0098] It should be noted that the above embodiment is a description of the process of analyzing the performance of the shock absorber using a shock absorber model. In addition to this application, the shock absorber model can also be applied to the simulation analysis of the whole vehicle, so as to obtain the state of the shock absorber during the movement of the whole vehicle, provide more basis for optimizing the shock absorber structure, and help improve the comfort of the whole vehicle.

[0099] In one embodiment, if Fig. 9 As shown, a vehicle simulation analysis method, characterized in that the method includes:

[0100] S101: Pre-constructing a shock absorber model corresponding to a target shock absorber.

[0101] Similarly, see Figure 2 As shown, in this embodiment, when performing vehicle performance analysis, a shock absorber model needs to be constructed first. Exemplarily, the target shock absorber includes a vehicle using a McPherson suspension or a vehicle using a shock absorber of another suspension type, without specific limitation.

[0102] Among them, the constructed shock absorber model is different from the traditional shock absorber model with a simple structure. In this embodiment, the shock absorber model includes a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector. The geometric center of the piston is located on the axis of the shock absorber sleeve, so that the piston can move and rotate along the axis of the shock absorber sleeve. The piston rod is connected to the piston by a piston connector, and the deformation of the piston seal and the piston rod can be reflected through the piston connector. At the shock absorber support position, the axis of the piston rod is constrained to always pass through the shock absorber support. The geometric center of the seat allows the piston rod to move and rotate. The shock absorber support and the shock absorber sleeve are connected with a support connector, and the flexible deformation of the shock absorber cylinder can be reflected through the support connector. It can be seen that the piston rod can slide up and down along the shock absorber sleeve and rotate around its own axis under the constraints of the upper and lower positions. The piston and the piston rod are respectively subjected to the forces of the shock absorber sleeve and the support. Therefore, the force position, size, and movement mode of the shock absorber can be consistent with the actual situation. Therefore, based on this shock absorber model, it can be applied to shock absorber performance analysis applications.

[0103] As an example, the piston connector includes a piston bushing, and the piston rod and the piston are connected by the piston bushing. In this embodiment, the piston connector is directly implemented in the form of a bushing, which is in line with the structural design of a general shock absorber, so that the shock absorber is close to the actual structural form, thereby improving the rationality of the shock absorber model. The piston connector can also be modeled using other connection structures between the piston rod and the piston, such as a pin connection form, which is not specifically limited.

[0104] As an example, the shock absorber support and the shock absorber sleeve are connected by a support bushing. In this embodiment, the support connector is directly implemented in the form of a bushing, which conforms to the structural design of the actual general shock absorber, making the shock absorber close to the actual structural form, and also improving the structural rationality of the shock absorber model. Similarly, the support connector can also be modeled in other connection forms, which are not specifically limited.

[0105] S102: Based on the shock absorber model, a simulation analysis is performed on the vehicle to obtain a simulation result of the vehicle.

[0106] After the shock absorber model is constructed, a whole vehicle model can be constructed based on the shock absorber model, and then the vehicle is simulated and analyzed using simulation software to obtain a simulation result of the vehicle.

[0107] It can be seen that this embodiment provides a vehicle simulation method based on the shock absorber model, so that the state of the shock absorber during the movement of the whole vehicle can be obtained, providing more reference basis for optimizing the shock absorber structure, and the movement status of the whole vehicle can also be obtained, which is beneficial to provide simulation data as a reference basis for improving the comfort of the whole vehicle, which is used to guide the design of the whole vehicle and has high practicality.

[0108] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0109] In one embodiment, a shock absorber performance analysis device is provided, and the automobile actuator control device corresponds one-to-one to the shock absorber performance analysis method in the above embodiment. The shock absorber performance analysis device includes a construction module and an analysis module. The functional modules are described in detail as follows:

[0110] A construction module is used to pre-construct a shock absorber model corresponding to a target shock absorber, wherein the shock absorber model comprises a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector, wherein the piston rod is connected to the piston by the piston connector, the geometric center of the piston is located on the axis of the shock absorber sleeve, and at the shock absorber support position, the axis of the piston rod is constrained to always pass through the geometric center of the shock absorber support, and the shock absorber support is connected to the shock absorber sleeve by the support connector;

[0111] The analysis module is used to obtain the structural parameters of the shock absorber model and determine the performance of the target shock absorber according to the structural parameters.

[0112] In one embodiment, a vehicle simulation analysis device is provided, which corresponds to the vehicle simulation analysis method in the above embodiment. The vehicle simulation analysis device includes a construction module and an analysis module. Each functional module is described in detail as follows:

[0113] A construction module is used to pre-construct a shock absorber model corresponding to a target shock absorber, wherein the shock absorber model comprises a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector, wherein the piston rod is connected to the piston by the piston connector, the geometric center of the piston is located on the axis of the shock absorber sleeve, and at the shock absorber support position, the axis of the piston rod is constrained to always pass through the geometric center of the shock absorber support, and the shock absorber support is connected to the shock absorber sleeve by the support connector;

[0114] The analysis module is used to perform simulation analysis on the vehicle based on the shock absorber model to obtain simulation results of the vehicle.

[0115] In combination with the above embodiment, in one embodiment, the piston connector includes a piston bushing, and the piston rod and the piston are connected by the piston bushing.

[0116] In combination with the above embodiment, in one embodiment, the shock absorber support and the shock absorber sleeve are connected by the support bushing.

[0117] In combination with the above embodiment, in one embodiment, the shock absorber model includes a shock absorber outer cylinder and a shock absorber inner cylinder, and the shock absorber support is connected to the shock absorber outer cylinder by the support connector.

[0118] In combination with the above embodiment, in one embodiment, the analysis module is further used for:

[0119] Calculating target stiffness parameters of the shock absorber model according to the structural parameters, wherein the target stiffness parameters include at least one or more of the following stiffness parameters: equivalent stiffness at the piston, torsional stiffness and equivalent stiffness of the support;

[0120] The target shock absorber performance is determined according to the target stiffness parameter.

[0121] In combination with the above embodiment, in one embodiment, the analysis module is further used for:

[0122] Decomposing the shock absorber model into a plurality of decomposed parts;

[0123] Using the structural parameters respectively, calculating the deformation of the stress point caused by each of the decomposed parts;

[0124] The deformation amounts of the force bearing points caused by the decomposed parts are correspondingly superimposed to obtain the deformation amounts of the support and the deformation amounts of the piston;

[0125] The target stiffness parameter of the shock absorber model is calculated according to the deformation of the support and the deformation of the piston.

[0126] In combination with the above embodiment, in one embodiment, the analysis module is further used for:

[0127] Acquiring stiffness test result data of the target shock absorber;

[0128] According to the stiffness test result data, the target stiffness parameter is corrected;

[0129] The performance of the target shock absorber is determined according to the corrected target stiffness parameter.

[0130] For the specific definition of the shock absorber performance analysis device or the vehicle simulation analysis device, please refer to the definition of the shock absorber performance analysis method or the vehicle simulation analysis method in the above text, which will not be repeated here. Each module in the above-mentioned shock absorber performance analysis device or the vehicle simulation analysis device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

[0131] In one embodiment, a computer device is provided, whose internal structure diagram can be as follows: Fig.10 As shown. The computer device includes a processor, a memory, and a network interface connected through a system bus. The processor of the controller is used to provide computing and control capabilities. The memory of the controller includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. When the computer program is executed by the processor, the steps or functions of a shock absorber performance analysis method or a vehicle performance analysis method are implemented.

[0132] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the shock absorber performance analysis or vehicle performance analysis method mentioned in any of the above embodiments are implemented, which will not be repeated here.

[0133] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0134] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0135] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A shock absorber performance analysis method, characterized in that: include: Pre-constructing a shock absorber model corresponding to a target shock absorber, the shock absorber model comprising a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector, the piston rod and the piston are connected by the piston connector, the geometric center of the piston is located on the axis of the shock absorber sleeve, at the shock absorber support position, the axis of the piston rod is constrained to always pass through the geometric center of the shock absorber support, and the shock absorber support and the shock absorber sleeve are connected by the support connector; Acquiring structural parameters of the shock absorber model; The performance of the target shock absorber is determined according to the structural parameters.

2. The shock absorber performance analysis method according to claim 1, characterized in that: The piston connector includes a piston bushing, and the piston rod and the piston are connected by the piston bushing.

3. The shock absorber performance analysis method according to claim 1, characterized in that: The shock absorber support and the shock absorber sleeve are connected by the support bushing.

4. The shock absorber performance analysis method according to claim 1, characterized in that: The shock absorber model comprises a shock absorber outer cylinder and a shock absorber inner cylinder, and the shock absorber support is connected to the shock absorber outer cylinder by the support connector.

5. The shock absorber performance analysis method according to claim 1, characterized in that: The step of calculating the performance parameters of the target shock absorber according to the structural parameters includes: Calculating target stiffness parameters of the shock absorber model according to the structural parameters, wherein the target stiffness parameters include at least one or more of the following stiffness parameters: equivalent stiffness at the piston, torsional stiffness and equivalent stiffness of the support; The target shock absorber performance is determined according to the target stiffness parameter.

6. The shock absorber performance analysis method according to claim 5, characterized in that: Calculating the target stiffness parameters of the shock absorber model according to the structural parameters includes: Decomposing the shock absorber model into a plurality of decomposed parts; Using the structural parameters respectively, calculating the deformation of the stress point caused by each of the decomposed parts; The deformation amounts of the force bearing points caused by the decomposed parts are correspondingly superimposed to obtain the deformation amounts of the support and the deformation amounts of the piston; The target stiffness parameter of the shock absorber model is calculated according to the deformation of the support and the deformation of the piston.

7. The shock absorber performance analysis method according to claim 5, characterized in that: Determining the performance of the target shock absorber according to the target stiffness parameter includes: Acquiring stiffness test result data of the target shock absorber; According to the stiffness test result data, the target stiffness parameter is corrected; The performance of the target shock absorber is determined according to the corrected target stiffness parameter.

8. A vehicle simulation analysis method, characterized in that: The method comprises: Pre-constructing a shock absorber model corresponding to a target shock absorber, the shock absorber model comprising a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector, the piston rod and the piston are connected by the piston connector, the geometric center of the piston is located on the axis of the shock absorber sleeve, at the shock absorber support position, the axis of the piston rod is constrained to always pass through the geometric center of the shock absorber support, and the shock absorber support and the shock absorber sleeve are connected by the support connector; Based on the shock absorber model, a simulation analysis is performed on the vehicle to obtain a simulation result of the vehicle.

9. A shock absorber performance analysis device, characterized in that: The device comprises: A construction module is used to pre-construct a shock absorber model corresponding to a target shock absorber, wherein the shock absorber model comprises a shock absorber sleeve, a piston rod, a piston, a support, a support connector and a piston connector, wherein the piston rod is connected to the piston by the piston connector, the geometric center of the piston is located on the axis of the shock absorber sleeve, and at the shock absorber support position, the axis of the piston rod is constrained to always pass through the geometric center of the shock absorber support, and the shock absorber support is connected to the shock absorber sleeve by the support connector; The analysis module is used to obtain the structural parameters of the shock absorber model and determine the performance of the target shock absorber according to the structural parameters.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the shock absorber performance analysis method according to any one of claims 1 to 7 is implemented, or the steps of the vehicle simulation analysis method according to claim 8 are implemented.

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