CN114936424A - Multi-degree-of-freedom analysis method and related device for vehicle rubber part - Google Patents
Multi-degree-of-freedom analysis method and related device for vehicle rubber part Download PDFInfo
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Abstract
The application discloses a vehicle rubber part multi-degree-of-freedom analysis method and a related device, aiming at a target vehicle comprising an auxiliary frame bushing, a first dynamic analysis model corresponding to a starting force assembly is established, a second dynamic analysis model corresponding to an auxiliary frame, a third dynamic analysis model corresponding to a vehicle body and a fourth dynamic analysis model corresponding to a tire are also established. The method can analyze not only the power assembly, but also the auxiliary frame and the suspension, namely, the multi-mode related to the target vehicle is decoupled as much as possible, and multi-degree-of-freedom analysis is carried out on the target vehicle from the whole, so that the mode distribution is reasonable, and the resonance problem is avoided. Therefore, through an integrated modeling mode of the power assembly, the auxiliary frame, the suspension and the tire, the interference of the power assembly (excitation source) and the auxiliary frame and other traditional path modes is avoided through the mode of analyzing the target vehicle more objectively with multiple degrees of freedom, and the accuracy of degree of freedom analysis and calculation is improved.
Description
Technical Field
The invention relates to the technical field of automobile control, in particular to a multi-degree-of-freedom analysis method for a vehicle rubber part and a related device.
Background
With the progress of the automobile industry and the further improvement of the requirement of consumers on commodities, the noise in the automobile gradually becomes an important factor for the selection of the consumers on the automobile. And each brand starts to mute the NVH of the whole vehicle. Among them, NVH, Noise, Vibration and Harshness (Noise, Vibration) is a comprehensive standard for measuring the quality of automobile manufacture. The quality of NVH is directly related to the experience of passengers in the vehicle, the noise and vibration in the vehicle are comprehensively fed back, and the feeling given to a common driver is even more direct than that of a chassis and a steering system.
The engine is used as a power device of a vehicle, and the vibration isolation performance of a suspension system of the engine has great influence on the NVH (noise, vibration and harshness) characteristic of the whole vehicle. In the related art, the suspension system is generally calculated by using a six-degree-of-freedom analysis method as shown in fig. 1, that is, the suspension system is regarded as a spring unit.
However, the precondition of the method is that the rigidity of the side of the suspended vehicle body is ignored, and the power assembly body mode and decoupling can only be relatively roughly analyzed and the precision is relatively low by looking at the paired ground, and the influence of the rigidity of the side of the vehicle body and other rubber parts is ignored.
Disclosure of Invention
In order to solve the problems, the application provides a vehicle rubber part multi-degree-of-freedom analysis method and a related device, and the accuracy of degree-of-freedom analysis and calculation is improved.
Based on this, the embodiment of the application discloses the following technical scheme:
in one aspect, an embodiment of the present application provides a method for analyzing multiple degrees of freedom of a vehicle rubber part, where the method includes:
establishing a first dynamic analysis model according to a powertrain of a target vehicle, the first dynamic analysis model including six degrees of freedom, the target vehicle including a subframe bushing;
establishing a second dynamic analysis model according to the auxiliary frame of the target vehicle, wherein the second dynamic analysis model comprises six degrees of freedom;
establishing a third dynamic analysis model according to the body of the target vehicle, wherein the third dynamic analysis model comprises three degrees of freedom;
establishing a fourth dynamical analysis model according to the tire of the target vehicle, wherein the fourth dynamical analysis model comprises four degrees of freedom;
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model and the fourth dynamics analysis model.
Optionally, the method further includes:
establishing a rear suspension pull rod model according to a rear pull rod of the target vehicle, wherein the rear suspension pull rod model comprises a degree of freedom;
the performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamic analysis model, the second dynamic analysis model, the third dynamic analysis model and the fourth dynamic analysis model includes:
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamic analysis model, the second dynamic analysis model, the third dynamic analysis model, the fourth dynamic analysis model and the rear suspension pull rod model.
Optionally, the method further includes:
establishing a fifth kinetic analysis model according to a rear pull rod of the target vehicle, wherein the fifth kinetic analysis model comprises six degrees of freedom;
the performing a multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, and the fourth dynamics analysis model includes:
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model.
Optionally, the performing the multiple degree of freedom analysis on the target vehicle according to the first dynamic analysis model, the second dynamic analysis model, the third dynamic analysis model, the fourth dynamic analysis model, and the fifth dynamic model includes:
establishing a twenty-five degree of automation dynamics calculation model according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model;
performing multi-degree-of-freedom analysis on the target vehicle according to the twenty-five-degree-of-automation dynamics calculation model;
wherein the twenty-five degree of automation dynamics calculation model is as follows:
wherein M is a mass matrix consisting of twenty-five degrees of freedom;
is the second derivative of the acceleration, or displacement X; k is a principal stiffness and coupling stiffness matrix consisting of rubber parts; x is a displacement.
In another aspect, the present application provides a vehicle rubber part multiple degree of freedom analysis device, which is characterized in that the device includes: the device comprises a first establishing unit, a second establishing unit, a third establishing unit, a fourth establishing unit and an analyzing unit;
the first establishing unit is used for establishing a first dynamic analysis model according to a power assembly of a target vehicle, the first dynamic analysis model comprises six degrees of freedom, and the target vehicle comprises a subframe bushing;
the second establishing unit is used for establishing a second dynamic analysis model according to the auxiliary frame of the target vehicle, and the second dynamic analysis model comprises six degrees of freedom;
the third establishing unit is used for establishing a third dynamic analysis model according to the body of the target vehicle, and the third dynamic analysis model comprises three degrees of freedom;
the fourth establishing unit is used for establishing a fourth dynamic analysis model according to the tire of the target vehicle, and the fourth dynamic analysis model comprises four degrees of freedom;
the analysis unit is used for carrying out multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model and the fourth dynamics analysis model.
Optionally, the apparatus further includes a fifth establishing unit, configured to:
establishing a rear suspension pull rod model according to a rear pull rod of the target vehicle, wherein the rear suspension pull rod model comprises a degree of freedom;
the analysis unit is specifically configured to:
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamic analysis model, the second dynamic analysis model, the third dynamic analysis model, the fourth dynamic analysis model and the rear suspension pull rod model.
Optionally, the apparatus further includes a fifth establishing unit, configured to:
establishing a fifth kinetic analysis model according to a rear pull rod of the target vehicle, wherein the fifth kinetic analysis model comprises six degrees of freedom;
the analysis unit is specifically configured to:
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model.
Optionally, the analysis unit is specifically configured to:
establishing a twenty-five degree of automation dynamics calculation model according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model;
performing multi-degree-of-freedom analysis on the target vehicle according to the twenty-five-degree-of-automation dynamics calculation model;
wherein the twenty-five degree of automation dynamics calculation model is as follows:
wherein M is a mass matrix consisting of twenty-five degrees of freedom;
is the second derivative of the acceleration, or displacement X; k is a principal stiffness and coupling stiffness matrix consisting of rubber parts; x is a displacement.
In another aspect, the present application provides a computer device comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to perform the method of the above aspect according to instructions in the program code.
In another aspect the present application provides a computer readable storage medium for storing a computer program for performing the method of the above aspect.
In another aspect, the present application provides a computer program product or a computer program, which includes computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the computer device to perform the method of the above aspect.
The above technical scheme of this application's advantage lies in:
aiming at a target vehicle comprising a subframe bushing, a first dynamic analysis model corresponding to a starting force assembly is established, and a second dynamic analysis model corresponding to a subframe, a third dynamic analysis model corresponding to a vehicle body and a fourth dynamic analysis model corresponding to a tire are also established. The method can analyze not only the power assembly, but also the auxiliary frame and the suspension, namely, the multi-mode related to the target vehicle is decoupled as much as possible, and multi-degree-of-freedom analysis is carried out on the target vehicle from the whole, so that the mode distribution is reasonable, and the resonance problem is avoided. Therefore, through an integrated modeling mode of the power assembly, the auxiliary frame, the suspension and the tires, the mode of the target vehicle is analyzed more objectively through multiple degrees of freedom, the interference of the power assembly (excitation source) and the auxiliary frame and other traditional path modes is avoided, and the accuracy of degree of freedom analysis and calculation is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a six degree-of-freedom computational model;
fig. 2 is a flowchart of a method for analyzing multiple degrees of freedom of a rubber part of a vehicle according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a six degree of freedom according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a twenty-five degree-of-freedom analytical model provided in an embodiment of the present application;
fig. 5 is a schematic view of a multi-degree-of-freedom analysis apparatus for a rubber member of a vehicle according to an embodiment of the present disclosure;
fig. 6 is a block diagram of a computer device according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The following describes a method for analyzing multiple degrees of freedom of a rubber part of a vehicle according to an embodiment of the present application with reference to fig. 2. Referring to fig. 2, which is a flowchart illustrating a method for analyzing multiple degrees of freedom of a rubber member of a vehicle according to an embodiment of the present application, the method may include S201-S205.
S201: a first dynamics analysis model is established based on a powertrain of a target vehicle.
A space rectangular coordinate system is established by taking the power assembly as the center, and three mutually perpendicular axes Ox, Oy and Oz all take O as the origin and have the same length unit. These three axes are referred to as the x-axis (horizontal axis), the y-axis (vertical axis), and the z-axis (vertical axis), respectively, and are collectively referred to as coordinate axes.
Referring to fig. 3, the figure is a schematic diagram of a six-degree-of-freedom according to an embodiment of the present disclosure. The first kinetic analysis model includes six degrees of freedom, namely three translation directions and three rotation directions, namely Forward (Forward) and backward (Back) along the X axis, Left (Left) and Right (Right) along the Y axis, Up (Up) and Down (Down) along the Z axis, rotation (rolling and Rol) around the X axis, Forward and backward rotation (pitching and Pitch) around the Y axis, and Left and Right rotation (Yaw and Yaw) around the Z axis.
S202: and establishing a second dynamic analysis model according to the auxiliary frame of the target vehicle.
Along with the updating iteration of automobile products, not only the power assembly is provided with the bushing, but also the auxiliary frame is provided with the bushing so as to improve the high-frequency performance. However, in the freedom degree analysis method in the related art, the rigidity of the side of the suspended vehicle body is ignored, and the side of the suspended vehicle body can only relatively roughly analyze the mode and the decoupling of the power assembly body in pairs, so that the precision is relatively low, and the influence of the rigidity of the side of the vehicle body and other rubber parts is ignored.
Based on this, the embodiment of the application is directed to a target vehicle including a subframe bushing, and a second dynamics analysis model is established with the subframe as a center, and the second dynamics analysis model includes six degrees of freedom, as shown in fig. 3, and is respectively a forward and backward movement along an X axis, a left and right movement along a Y axis, a up and down movement along a Z axis, a rotation around the X axis, a forward and backward rotation around the Y axis, and a left and right rotation around the Z axis. Therefore, the second dynamic analysis model is established for the auxiliary frame, and can analyze the operations of torsion, turning and the like of the steering mechanism of the target vehicle, so that the mode distribution is reasonable, and the resonance problem is avoided.
S203: and establishing a third dynamic analysis model according to the body of the target vehicle.
And establishing a third dynamic analysis model by taking the vehicle body as a center, wherein the third dynamic analysis model comprises three degrees of freedom which are respectively front and back movement along an X axis, left and right movement along a Y axis and up and down movement along a Z axis. Therefore, the third dynamic analysis model is established for the vehicle body, so that the power assembly is not considered as the ground, the influence of the vehicle body rigidity factor on the analysis accuracy is not ignored, and the analysis accuracy is improved.
S204: and establishing a fourth dynamic analysis model according to the tire of the target vehicle.
And respectively establishing a space rectangular coordinate system by taking each tire as a center, wherein the fourth dynamics analysis model comprises four degrees of freedom, and the four tires of the target vehicle respectively move up and down along the Z axis. Therefore, the fourth dynamic analysis model is established for the tire, so that the power assembly is not considered as the ground, the influence of the vehicle body rigidity factor on the analysis accuracy is not ignored, and the analysis accuracy is improved.
S205: and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model and the fourth dynamics analysis model.
Nineteen degrees of freedom are obtained through the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model and the fourth dynamics analysis model, nineteen degree of freedom analysis is carried out on the target vehicle, the analysis includes a power assembly, an auxiliary frame, a suspension, a tire mode and decoupling performance, and the accuracy of the analysis and calculation of the degree of freedom of the target vehicle is improved.
According to the technical scheme, the first dynamic analysis model corresponding to the starting force assembly, the second dynamic analysis model corresponding to the auxiliary frame, the third dynamic analysis model corresponding to the vehicle body and the fourth dynamic analysis model corresponding to the tire are established for the target vehicle comprising the auxiliary frame bushing. The method can analyze not only the power assembly, but also the auxiliary frame and the suspension, namely, the multi-mode related to the target vehicle is decoupled as much as possible, and multi-degree-of-freedom analysis is carried out on the target vehicle from the whole, so that the mode distribution is reasonable, and the resonance problem is avoided. Therefore, through an integrated modeling mode of the power assembly, the auxiliary frame, the suspension and the tire, the interference of the power assembly (excitation source) and the auxiliary frame and other traditional path modes is avoided through the mode of analyzing the target vehicle more objectively with multiple degrees of freedom, and the accuracy of degree of freedom analysis and calculation is improved.
As one possible implementation, the multiple degree of freedom analysis of the target vehicle may also be extended to twenty. Specifically, a rear suspension pull rod model is established according to a rear pull rod of the target vehicle, the rear suspension pull rod model comprises a degree of freedom, the rear pull rod model state is reflected, multi-degree-of-freedom analysis can be subsequently performed on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the rear suspension pull rod model, and the accuracy of the degree of freedom analysis and calculation of the target vehicle is further improved.
As a possible implementation, the multiple degree of freedom analysis of the target vehicle may also be extended to twenty-five. Specifically, a fifth dynamics analysis model is established according to the rear pull rod of the target vehicle, that is, the fifth dynamics analysis model is established with the rear pull rod as the center, and the fifth dynamics analysis model includes six degrees of freedom, as shown in fig. 3, which are respectively forward and backward movement along the X axis, leftward and rightward movement along the Y axis, upward and downward movement along the Z axis, rotation around the X axis, forward and backward rotation around the Y axis, and left and right rotation around the Z axis. Compared with the rear suspension pull rod model with only one degree of freedom, the mode distribution of the fifth kinetic analysis model with six degrees of freedom is more reasonable.
Furthermore, multi-degree-of-freedom analysis can be performed on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model. Referring to fig. 4, the figure is a schematic diagram of a twenty-five degree-of-freedom analysis model provided in the embodiment of the present application. The power assembly can be analyzed, the auxiliary frame, the suspension and the rear pull rod can be analyzed, multi-modes related to a target vehicle are further decoupled, multi-degree-of-freedom analysis is carried out on the target vehicle from the whole, and the reasonability of mode distribution is improved so as to avoid the resonance problem. Therefore, through an integrated modeling mode of the power assembly, the auxiliary frame, the suspension, the rear pull rod and the tire, the mode of the target vehicle is analyzed more objectively through multiple degrees of freedom, the interference of the power assembly (an excitation source) and the traditional path modes such as the auxiliary frame and the pull rod is avoided, a model is more accurate on the basis of twenty-five degree-of-freedom analysis modes, decoupling and dynamic reaction force calculation, and the degree-of-freedom analysis calculation precision is improved.
The following describes a multi-degree-of-freedom analysis of a target vehicle based on five dynamics analysis models and twenty-five degrees of freedom.
According to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model, a twenty-five automatic degree dynamics calculation model is established, and the following steps are performed:
wherein M is a mass matrix consisting of 25 degrees of freedom;
is the second derivative of the acceleration, or displacement X; k is a main rigidity and coupling rigidity matrix consisting of rubber parts; x is a displacement.
M is a mass matrix composed of 25 degrees of freedom, and the 25 degrees of freedom are derived from twenty-five degrees of freedom obtained by the first kinetic analysis model, the second kinetic analysis model, the third kinetic analysis model, the fourth kinetic analysis model and the fifth kinetic analysis model, and are represented as follows:
wherein M is 1 Is a power assembly inertia parameter matrix; m 2 Is a back pull rod inertia parameter matrix; m 3 An auxiliary frame inertia parameter matrix; m 4 An inertia parameter matrix of the suspended mass block, namely an inertia parameter matrix corresponding to the vehicle body; m 5 Is a tire weight matrix.
K is a main stiffness and coupling stiffness matrix consisting of rubber parts and is expressed as follows:
wherein, K 1 Is at M 1 Suspension stiffness under a coordinate system; k 2 Is at M 2 The rigidity of a large bushing of the rear pull rod under a coordinate system; k 3 Is at M 3 Subframe bushings in a coordinate system; k 4 Is at M 4 Suspension bushing stiffness in a coordinate system; k 5 Is at M 5 Tire stiffness in a coordinate system; k ij Is at M i K in the coordinate system i And K j I and j are natural numbers from 1 to 5.
It should be noted that after the stiffness and mass matrix is locked, the mode and the decoupling may be calculated by using a matrix iteration method, and the dynamic reaction force may be calculated by using a Newmark- β method, which is not specifically limited in this embodiment of the present application.
According to the scheme, the method for establishing the quality matrix and the rigidity matrix with 25 degrees of freedom is provided, rigid body modes corresponding to chassis rubbers are analyzed in a more systematic mode, the rigid body modes comprise a power assembly, an auxiliary frame, a rear pull rod, a suspension and tire parts, and the total degree of freedom is 25. And on this basis, the model, decoupling and dynamic reaction force are analyzed and calculated, and compared with other freedom degree models, the model of the embodiment of the application is more accurate and is more suitable for development of the vehicle chassis rubber system with the auxiliary frame bushing.
The embodiment of the application provides a multi-degree-of-freedom analysis method for a rubber part of a vehicle, and also provides a multi-degree-of-freedom analysis device for a rubber part of a vehicle, as shown in fig. 5, the device comprises: a first establishing unit 501, a second establishing unit 502, a third establishing unit 503, a fourth establishing unit 504 and an analyzing unit 505;
the first establishing unit 501 is configured to establish a first dynamic analysis model according to a powertrain of a target vehicle, where the first dynamic analysis model includes six degrees of freedom, and the target vehicle includes a subframe bushing;
the second establishing unit 502 is configured to establish a second dynamics analysis model according to the subframe of the target vehicle, where the second dynamics analysis model includes six degrees of freedom;
the third establishing unit 503 is configured to establish a third dynamical analysis model according to the body of the target vehicle, where the third dynamical analysis model includes three degrees of freedom;
the fourth establishing unit 504 is configured to establish a fourth dynamical analysis model according to the tire of the target vehicle, where the fourth dynamical analysis model includes four degrees of freedom;
the analysis unit 505 is configured to perform a multiple degree of freedom analysis on the target vehicle according to the first dynamic analysis model, the second dynamic analysis model, the third dynamic analysis model, and the fourth dynamic analysis model.
As a possible implementation manner, the apparatus further includes a fifth establishing unit, configured to:
establishing a rear suspension pull rod model according to a rear pull rod of the target vehicle, wherein the rear suspension pull rod model comprises a degree of freedom;
the analysis unit 505 is specifically configured to:
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamic analysis model, the second dynamic analysis model, the third dynamic analysis model, the fourth dynamic analysis model and the rear suspension pull rod model.
As a possible implementation manner, the apparatus further includes a fifth establishing unit, configured to:
establishing a fifth kinetic analysis model according to a rear pull rod of the target vehicle, wherein the fifth kinetic analysis model comprises six degrees of freedom;
the analysis unit 505 is specifically configured to:
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model.
As a possible implementation manner, the analysis unit 505 is specifically configured to:
establishing a twenty-five degree of automation dynamics calculation model according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model;
performing multi-degree-of-freedom analysis on the target vehicle according to the twenty-five-degree-of-automation dynamics calculation model;
wherein the twenty-five degree of automation dynamics calculation model is as follows:
wherein M is a mass matrix consisting of twenty-five degrees of freedom;
is the second derivative of the acceleration, or displacement X; k is a principal stiffness and coupling stiffness matrix consisting of rubber parts; x is a displacement.
According to the technical scheme, the first dynamic analysis model corresponding to the starting force assembly, the second dynamic analysis model corresponding to the auxiliary frame, the third dynamic analysis model corresponding to the vehicle body and the fourth dynamic analysis model corresponding to the tire are established for the target vehicle comprising the auxiliary frame bushing. The method can analyze not only the power assembly, but also the auxiliary frame and the suspension, namely, the multi-mode related to the target vehicle is decoupled as much as possible, and multi-degree-of-freedom analysis is carried out on the target vehicle from the whole, so that the mode distribution is reasonable, and the resonance problem is avoided. Therefore, through an integrated modeling mode of the power assembly, the auxiliary frame, the suspension and the tire, the interference of the power assembly (excitation source) and the auxiliary frame and other traditional path modes is avoided through the mode of analyzing the target vehicle more objectively with multiple degrees of freedom, and the accuracy of degree of freedom analysis and calculation is improved.
An embodiment of the present application further provides a computer device, referring to fig. 6, which shows a structure diagram of a computer device provided in an embodiment of the present application, and as shown in fig. 6, the computer device includes a processor 610 and a memory 620:
the memory 610 is used for storing program codes and transmitting the program codes to the processor;
the processor 620 is configured to execute any one of the vehicle rubber multiple degree of freedom analysis methods provided in the above embodiments according to the instructions in the program code.
The embodiment of the application provides a computer-readable storage medium, which is used for storing a computer program, and the computer program is used for executing any one of the vehicle rubber part multiple freedom degree analysis methods provided by the embodiments.
Embodiments of the present application also provide a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to enable the computer device to execute the vehicle rubber part multiple degree of freedom analysis method provided in the various optional implementation modes of the above aspects.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the system or the device disclosed by the embodiment, the description is simple because the system or the device corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A multi-degree-of-freedom analysis method for a vehicle rubber part is characterized by comprising the following steps of:
establishing a first dynamic analysis model from a powertrain of a target vehicle, the first dynamic analysis model including six degrees of freedom, the target vehicle including a subframe bushing;
establishing a second dynamic analysis model according to the auxiliary frame of the target vehicle, wherein the second dynamic analysis model comprises six degrees of freedom;
establishing a third dynamic analysis model according to the body of the target vehicle, wherein the third dynamic analysis model comprises three degrees of freedom;
establishing a fourth dynamical analysis model according to the tire of the target vehicle, wherein the fourth dynamical analysis model comprises four degrees of freedom;
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model and the fourth dynamics analysis model.
2. The method of claim 1, further comprising:
establishing a rear suspension pull rod model according to a rear pull rod of the target vehicle, wherein the rear suspension pull rod model comprises a degree of freedom;
the performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamic analysis model, the second dynamic analysis model, the third dynamic analysis model and the fourth dynamic analysis model includes:
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamic analysis model, the second dynamic analysis model, the third dynamic analysis model, the fourth dynamic analysis model and the rear suspension pull rod model.
3. The method of claim 1, further comprising:
establishing a fifth kinetic analysis model according to a rear pull rod of the target vehicle, wherein the fifth kinetic analysis model comprises six degrees of freedom;
the performing a multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, and the fourth dynamics analysis model includes:
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model.
4. The method of claim 3, wherein the performing a multiple degree of freedom analysis on the target vehicle based on the first kinetic analysis model, the second kinetic analysis model, the third kinetic analysis model, the fourth kinetic analysis model, and the fifth kinetic model comprises:
establishing a twenty-five degree of automation dynamics calculation model according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model;
performing multi-degree-of-freedom analysis on the target vehicle according to the twenty-five automation dynamics calculation model;
wherein the twenty-five degree of automation dynamics calculation model is as follows:
wherein M is a mass matrix consisting of twenty-five degrees of freedom;
is the second derivative of the acceleration, or displacement X; k is a main rigidity and coupling rigidity matrix consisting of rubber parts; x is a displacement.
5. A multi-degree-of-freedom analysis device for a vehicle rubber part is characterized by comprising: the device comprises a first establishing unit, a second establishing unit, a third establishing unit, a fourth establishing unit and an analyzing unit;
the first establishing unit is used for establishing a first dynamic analysis model according to a power assembly of a target vehicle, the first dynamic analysis model comprises six degrees of freedom, and the target vehicle comprises an auxiliary frame lining;
the second establishing unit is used for establishing a second dynamic analysis model according to the auxiliary frame of the target vehicle, and the second dynamic analysis model comprises six degrees of freedom;
the third establishing unit is used for establishing a third dynamic analysis model according to the body of the target vehicle, and the third dynamic analysis model comprises three degrees of freedom;
the fourth establishing unit is used for establishing a fourth dynamic analysis model according to the tire of the target vehicle, and the fourth dynamic analysis model comprises four degrees of freedom;
the analysis unit is used for performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model and the fourth dynamics analysis model.
6. The apparatus according to claim 5, wherein the apparatus further comprises a fifth establishing unit configured to:
establishing a rear suspension pull rod model according to a rear pull rod of the target vehicle, wherein the rear suspension pull rod model comprises a degree of freedom;
the analysis unit is specifically configured to:
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamic analysis model, the second dynamic analysis model, the third dynamic analysis model, the fourth dynamic analysis model and the rear suspension pull rod model.
7. The apparatus according to claim 5, wherein the apparatus further comprises a fifth establishing unit configured to:
establishing a fifth kinetic analysis model according to a rear pull rod of the target vehicle, wherein the fifth kinetic analysis model comprises six degrees of freedom;
the analysis unit is specifically configured to:
and performing multi-degree-of-freedom analysis on the target vehicle according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model.
8. The apparatus according to claim 7, wherein the analysis unit is specifically configured to:
establishing a twenty-five degree of automation dynamics calculation model according to the first dynamics analysis model, the second dynamics analysis model, the third dynamics analysis model, the fourth dynamics analysis model and the fifth dynamics analysis model;
performing multi-degree-of-freedom analysis on the target vehicle according to the twenty-five-degree-of-automation dynamics calculation model;
wherein the twenty-five degree of automation dynamics calculation model is as follows:
wherein M is a mass matrix consisting of twenty-five degrees of freedom;
is the second derivative of the acceleration, or displacement X; k is a main rigidity and coupling rigidity matrix consisting of rubber parts; x is the displacement.
9. A computer device, the device comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to perform the method of any of claims 1-4 according to instructions in the program code.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium is used to store a computer program for performing the method of any of claims 1-4.
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| CN117408092A (en) * | 2023-12-14 | 2024-01-16 | 陕西汽车集团股份有限公司 | Robustness optimization method and system for commercial vehicle power assembly suspension system |
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| CN117408092A (en) * | 2023-12-14 | 2024-01-16 | 陕西汽车集团股份有限公司 | Robustness optimization method and system for commercial vehicle power assembly suspension system |
| CN117408092B (en) * | 2023-12-14 | 2024-02-23 | 陕西汽车集团股份有限公司 | Robustness optimization method and system for commercial vehicle power assembly suspension system |
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