CN112131717A - Suspension and plate spring motion analysis method and system - Google Patents
Suspension and plate spring motion analysis method and system Download PDFInfo
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Abstract
The invention discloses a method and a system for analyzing the motion of a suspension and a plate spring, wherein the method comprises the following steps: performing segmented simulation processing on the plate spring to obtain a plate spring equivalent model; calculating data parameters of a leaf spring equivalent model; acquiring a dynamic simulation hard point skeleton model of a suspension; and inputting the data parameters of the leaf spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model to obtain the kinematic characteristic data corresponding to the suspension and the leaf spring. The invention can simplify the plate spring into a plate spring equivalent model so as to combine the plate spring with the whole suspension mechanism, is beneficial to realizing the dynamic simulation of the whole suspension system, thereby realizing the high-approximation plate spring motion simulation, realizing the dynamic analysis of the suspension inclination run-out and being beneficial to playing a guiding role in the design of peripheral parts at the front part.
Description
Technical Field
The invention relates to the field of dynamic analysis of an automobile design suspension system, in particular to a suspension and plate spring motion analysis method and system.
Background
At the present stage, the research on the suspension and the leaf spring kinematic simulation is less in the industry, and the traditional leaf spring track method, leaf spring parametric modeling and other analysis methods cannot combine the leaf spring with the whole suspension mechanism, so that certain difficulties are brought to the integrity of suspension system dynamic analysis, subsequent boundary setting and other work, and a related guidance effect on the design of front peripheral parts cannot be achieved.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, an object of the present invention is to provide a suspension and a leaf spring motion analysis method, which can simplify a leaf spring into a leaf spring equivalent model, so as to combine the leaf spring with the whole suspension mechanism, and facilitate realization of dynamic simulation of the whole suspension system, thereby realizing high-approximation leaf spring motion simulation, and also can realize dynamic analysis of suspension tilt bounce, and facilitate guidance on design of front peripheral components.
Therefore, a second object of the present invention is to provide a suspension and a leaf spring motion analysis system.
To this end, a third object of the invention is to propose a computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention discloses a suspension and a leaf spring motion analysis method, including the following steps: carrying out segmented simulation processing on the plate spring to obtain a plate spring equivalent model; calculating data parameters of the plate spring equivalent model; acquiring a dynamic simulation hard point skeleton model of a suspension; and inputting the data parameters of the leaf spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model to obtain the kinematic characteristic data corresponding to the suspension and the leaf spring.
According to the suspension and the leaf spring motion analysis method provided by the embodiment of the invention, the leaf spring is subjected to sectional simulation processing to obtain a leaf spring equivalent model; calculating data parameters of a leaf spring equivalent model; acquiring a dynamic simulation hard point skeleton model of a suspension; and inputting the data parameters of the leaf spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model to obtain the kinematic characteristic data corresponding to the suspension and the leaf spring. Therefore, the method can simplify the plate spring into a plate spring equivalent model so as to combine the plate spring with the whole suspension mechanism, is favorable for realizing dynamic simulation of the whole suspension system, realizes high-approximation plate spring motion simulation, can realize dynamic analysis of suspension inclination bounce, and is favorable for guiding the design of peripheral parts at the front part.
In addition, the suspension and the leaf spring motion analysis method according to the above embodiment of the present invention may further include the following additional technical features:
in some examples, the performing a piecewise simulation process on the leaf spring to obtain a leaf spring equivalent model includes: according to the actual parameters of the plate spring under the action of the vertical load, the plate spring is simplified into a plate spring equivalent model, wherein the plate spring equivalent model is configured into a three-link mechanism, and the three-link mechanism comprises a first connecting rod, a second connecting rod and a lifting lug, wherein the first connecting rod, the second connecting rod and the third connecting rod are sequentially connected, and the lifting lug is connected with one end of the third connecting rod.
In some examples, the calculating data parameters of the leaf spring equivalent model includes:
calculating the length of the first connecting rod by equation (1):
Ra＝0.75(a-m) (1)
in the formula (1), Ra is the length of the first connecting rod, a is the arc length of the front half section of the plate spring, and m is the length of the front part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by the formula (2):
Rb＝0.75(b-n) (2)
in the formula (2), Rb is the length of the second connecting rod, b is the arc length of the rear half section of the plate spring, and n is the length of the rear part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by formula (3):
Rc＝L-(Ra+Rb) (3)
in the formula (2), Rc is the length of the third connecting rod, and L is the arc length of the first plate spring;
and taking the length corresponding to the lifting lug of the plate spring as the length of the lifting lug.
In some examples, a point corresponding to a center of the leaf spring in the leaf spring equivalent model is located on the second link, and a distance between the point corresponding to the center of the leaf spring and a connection point of the first link and the second link is:
d＝a-Ra
wherein d is a distance between the point corresponding to the center of the plate spring and a connection point of the first link and the second link.
In some examples, the preset suspension dynamics parameters include at least: a bounce drive parameter applied to the front and rear suspensions, a corner drive parameter applied to the steering system, and a traverse drive parameter applied to the front axle.
In some examples, the kinematic characteristic data of the suspension and leaf springs include at least: the motion trail of the plate spring and the motion boundary of the suspension under different working conditions.
In order to achieve the above object, an embodiment of a second aspect of the present invention discloses a suspension and leaf spring motion analysis system, including: the simulation module is used for carrying out segmented simulation processing on the plate spring to obtain a plate spring equivalent model; the calculating module is used for calculating data parameters of the plate spring equivalent model; the acquisition module is used for acquiring a dynamic simulation hard point skeleton model of the suspension; and the analysis module is used for inputting the data parameters of the plate spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model to obtain the kinematic characteristic data corresponding to the suspension and the plate spring.
According to the suspension and the leaf spring motion analysis system provided by the embodiment of the invention, the leaf spring is subjected to sectional simulation processing to obtain a leaf spring equivalent model; calculating data parameters of a leaf spring equivalent model; acquiring a dynamic simulation hard point skeleton model of a suspension; and inputting the data parameters of the leaf spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model to obtain the kinematic characteristic data corresponding to the suspension and the leaf spring. Therefore, the system can simplify the plate spring into a plate spring equivalent model, so that the plate spring is combined with the whole suspension mechanism, the dynamic simulation of the whole suspension system is facilitated, the motion simulation of the plate spring with high approximation degree is realized, the dynamic analysis of the inclination and the bounce of the suspension is realized, and the design of peripheral parts at the front part is facilitated to be guided.
In addition, the suspension and leaf spring motion analysis system of the above embodiment of the present invention may further include the following additional technical features;
in some examples, the simulation module is to: according to the actual parameters of the plate spring under the action of the vertical load, the plate spring is simplified into a plate spring equivalent model, wherein the plate spring equivalent model is configured into a three-link mechanism, and the three-link mechanism comprises a first connecting rod, a second connecting rod and a lifting lug, wherein the first connecting rod, the second connecting rod and the third connecting rod are sequentially connected, and the lifting lug is connected with one end of the third connecting rod.
In some examples, the computing module is to:
calculating the length of the first connecting rod by equation (1):
Ra＝0.75(a-m) (1)
in the formula (1), Ra is the length of the first connecting rod, a is the arc length of the front half section of the plate spring, and m is the length of the front part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by the formula (2):
Rb＝0.75(b-n) (2)
in the formula (2), Rb is the length of the second connecting rod, b is the arc length of the rear half section of the plate spring, and n is the length of the rear part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by formula (3):
Rc＝L-(Ra+Rb) (3)
in the formula (2), Rc is the length of the third connecting rod, and L is the arc length of the first plate spring;
and taking the length corresponding to the lifting lug of the plate spring as the length of the lifting lug.
In some examples, a point corresponding to a center of the leaf spring in the leaf spring equivalent model is located on the second link, and a distance between the point corresponding to the center of the leaf spring and a connection point of the first link and the second link is:
d＝a-Ra
wherein d is a distance between the point corresponding to the center of the plate spring and a connection point of the first link and the second link.
To achieve the above object, an embodiment of a third aspect of the present invention discloses a computer-readable storage medium having a suspension and leaf spring motion analysis program stored thereon, which when executed by a processor, implements a suspension and leaf spring motion analysis method according to the above embodiment of the present invention.
According to the computer-readable storage medium provided by the embodiment of the invention, the leaf spring can be simplified into a leaf spring equivalent model, so that the leaf spring and the whole suspension mechanism are combined, the dynamic simulation of the whole suspension system is favorably realized, the motion simulation of the leaf spring with high approximation degree is further realized, the dynamic analysis of the inclination and the bounce of the suspension is realized, and the design of peripheral parts at the front part is favorably guided.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
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The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow diagram of a suspension and leaf spring motion analysis method according to one embodiment of the present invention;
FIG. 2 is a schematic view of a leaf spring lead according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a leaf spring equivalent model according to one embodiment of the invention;
FIG. 4 is a schematic view of a three-bar linkage mechanism according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a suspension and leaf spring motion analysis system according to one embodiment of the present invention;
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A suspension and leaf spring motion analysis method and system according to an embodiment of the present invention is described below with reference to fig. 1-5.
FIG. 1 is a flow diagram of a suspension and leaf spring motion analysis method according to one embodiment of the present invention. As shown in fig. 1, the suspension and leaf spring motion analysis method includes the following steps:
step S1: and carrying out segmented simulation treatment on the plate spring to obtain a plate spring equivalent model.
In an embodiment of the present invention, the performing a piecewise simulation process on the leaf spring to obtain a leaf spring equivalent model includes: according to the actual parameters of the plate spring under the action of the vertical load, the plate spring is simplified into a plate spring equivalent model, wherein the plate spring equivalent model is configured into a three-link mechanism, and the three-link mechanism comprises a first connecting rod, a second connecting rod and a lifting lug which are sequentially connected, and the lifting lug is connected with one end of the third connecting rod.
Specifically, based on the fact that the leaf springs (leaf springs) are in an ideal arc shape under the action of a vertical load, the dimensions of the first leaf spring are as shown in fig. 2, for example. In order to reduce the number of objects in the leaf spring equivalent model, the embodiment of the invention adopts a three-link mechanism to approximately simplify the leaf spring, i.e. the leaf spring is simplified into the leaf spring equivalent model, and the leaf spring equivalent model is configured into the three-link mechanism, specifically, for example, the equivalent linkage mechanism shown in fig. 3, wherein a lifting lug is included. The three-link mechanism can approximately describe the kinematic characteristics such as the motion trail of a relevant point when the leaf spring deforms, the leaf spring is simplified into three rods in the leaf spring equivalent model, the length of each rod and the center of the leaf spring can be determined by subsequent calculation, and the length of the lifting lug is the actual length of the lifting lug.
Step S2: and calculating data parameters of the plate spring equivalent model.
In one embodiment of the present invention, the process of calculating the data parameters of the leaf spring equivalent model includes:
calculating the length of the first connecting rod by formula (1):
Ra＝0.75(a-m) (1)
in the formula (1), Ra is the length of the first connecting rod, a is the arc length of the front half section of the plate spring, and m is the length of the front part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by the formula (2):
Rb＝0.75(b-n) (2)
in the formula (2), Rb is the length of the second connecting rod, b is the arc length of the rear half section of the plate spring, and n is the length of the rear part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by formula (3):
Rc＝L-(Ra+Rb) (3)
in formula (2), Rc is the length of the third link, and L is the arc length of the first leaf spring.
And taking the actual length corresponding to the lifting lug of the plate spring as the length of the lifting lug in the equivalent model of the plate spring.
Further, referring to fig. 3, in the leaf spring equivalent model, a point corresponding to the center of the leaf spring is located on the second link, and a distance between the point corresponding to the center of the leaf spring and a connection point of the first link and the second link is:
d＝a-Ra
wherein d is a distance between a point corresponding to the center of the leaf spring and a connection point of the first link and the second link.
That is, through the above calculation, the plate spring is divided into three sections of Ra, Rb and Rc, for example, as shown in fig. 4, that is, a first link, a second link and a third link corresponding to an equivalent model of the plate spring, so that the plate spring structure is greatly simplified, the plate spring is combined with the whole suspension mechanism, dynamic simulation of the whole suspension system is facilitated, high-approximation plate spring motion simulation is achieved, dynamic analysis of suspension tilt bounce can be achieved, and guidance is facilitated for design of front peripheral parts.
Step S3: and acquiring a dynamic simulation hard point skeleton model of the suspension.
In a specific embodiment, the process of obtaining a dynamically simulated hard point skeleton-level model of a suspension comprises: the method comprises the steps of obtaining a corresponding dynamic simulation hard point skeleton model of a suspension from a preset model database, wherein the preset model database comprises a plurality of simulation models and at least comprises the dynamic simulation hard point skeleton model of the suspension. In other words, the dynamic simulation hard point skeleton model of the suspension is preset, and can be called and used according to requirements through the model database when in actual use.
Step S4: and inputting the data parameters of the leaf spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model to obtain the kinematic characteristic data corresponding to the suspension and the leaf spring.
In one embodiment of the present invention, the preset suspension dynamic parameters at least include: a bounce drive parameter applied to the front and rear suspensions, a corner drive parameter applied to the steering system, and a traverse drive parameter applied to the front axle.
That is, the data parameters of the leaf spring equivalent model calculated in step S2, and the preset suspension dynamic parameters such as the bounce drive parameter applied to the front and rear suspensions, the corner drive parameter applied to the steering system, and the lateral movement drive parameter applied to the front axle are input to the dynamic simulation hard point skeleton model, and the kinematics characteristic data corresponding to the suspension and the leaf spring are obtained through model arithmetic analysis. In a specific example, the kinematic characteristic data of the suspension and the leaf spring comprise at least: the motion trail of the plate spring and the motion boundary of the suspension under different working conditions. Therefore, the plate spring and the whole suspension mechanism are combined conveniently, integrity and subsequent boundary setting of dynamic analysis of the suspension system are facilitated, dynamic simulation of the whole suspension system is facilitated, high-approximation degree plate spring motion simulation is achieved, dynamic analysis of suspension inclination jumping is achieved, and guiding effect on design of front peripheral parts is facilitated.
In a specific embodiment, for example, after obtaining a leaf spring equivalent model, such as a three-bar linkage, the three-segment leaf spring is put into a dynamic simulation hard point skeleton model of a suspension, such as a simulation mechanism of a double-front-axle suspension system, the leaf spring and other parts are constrained, bouncing drive is applied to front and rear suspensions, corner drive is applied to a steering system, and traversing drive is applied to two front axles, so that the leaf spring is combined with the whole suspension mechanism, a simulation analysis process is completed, kinematic characteristic data such as a motion track of the leaf spring and motion boundaries of the suspension under different working conditions are accurately obtained, and guidance effect on design of parts around the front is facilitated.
Therefore, the embodiment of the invention can simplify the arc shape of the plate spring into a rod-type structure, and design the dynamic mechanism according to the thought, namely, the steel plate spring is combined with the whole suspension mechanism, so that the dynamic simulation of the whole suspension system is facilitated, the motion analysis of the plate spring with high approximation degree is realized, and the dynamic analysis of the suspension inclination bounce is realized.
According to the suspension and the leaf spring motion analysis method provided by the embodiment of the invention, the leaf spring is subjected to sectional simulation processing to obtain a leaf spring equivalent model; calculating data parameters of a leaf spring equivalent model; acquiring a dynamic simulation hard point skeleton model of a suspension; and inputting the data parameters of the leaf spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model to obtain the kinematic characteristic data corresponding to the suspension and the leaf spring. Therefore, the method can simplify the plate spring into a plate spring equivalent model so as to combine the plate spring with the whole suspension mechanism, is favorable for realizing dynamic simulation of the whole suspension system, realizes high-approximation plate spring motion simulation, can realize dynamic analysis of suspension inclination bounce, and is favorable for guiding the design of peripheral parts at the front part.
The embodiment of the invention also provides a suspension and a leaf spring motion analysis system.
Figure 5 is a schematic diagram of a suspension and leaf spring motion analysis system according to one embodiment of the present invention. As shown in fig. 5, the suspension and leaf spring motion analysis system 100 includes: a simulation module 110, a calculation module 120, an acquisition module 130, and an analysis module 140.
The simulation module 110 is configured to perform a piecewise simulation process on the leaf spring to obtain a leaf spring equivalent model.
In an embodiment of the present invention, the simulation module 110 performs a piecewise simulation process on the leaf spring to obtain a leaf spring equivalent model, including: according to the actual parameters of the plate spring under the action of the vertical load, the plate spring is simplified into a plate spring equivalent model, wherein the plate spring equivalent model is configured into a three-link mechanism, and the three-link mechanism comprises a first connecting rod, a second connecting rod and a lifting lug which are sequentially connected, and the lifting lug is connected with one end of the third connecting rod.
Specifically, based on the fact that the leaf springs (leaf springs) are in an ideal arc shape under the action of a vertical load, the dimensions of the first leaf spring are as shown in fig. 2, for example. In order to reduce the number of objects in the leaf spring equivalent model, the embodiment of the invention adopts a three-link mechanism to approximately simplify the leaf spring, i.e. the leaf spring is simplified into the leaf spring equivalent model, and the leaf spring equivalent model is configured into the three-link mechanism, specifically, for example, the equivalent linkage mechanism shown in fig. 3, wherein a lifting lug is included. The three-link mechanism can approximately describe the kinematic characteristics such as the motion trail of a relevant point when the leaf spring deforms, the leaf spring is simplified into three rods in the leaf spring equivalent model, the length of each rod and the center of the leaf spring can be determined by subsequent calculation, and the length of the lifting lug is the actual length of the lifting lug.
The calculation module 120 is used for calculating data parameters of the plate spring equivalent model.
In an embodiment of the present invention, the process of calculating the data parameters of the leaf spring equivalent model by the calculation module 120 includes:
calculating the length of the first connecting rod by formula (1):
Ra＝0.75(a-m) (1)
in the formula (1), Ra is the length of the first connecting rod, a is the arc length of the front half section of the plate spring, and m is the length of the front part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by the formula (2):
Rb＝0.75(b-n) (2)
in the formula (2), Rb is the length of the second connecting rod, b is the arc length of the rear half section of the plate spring, and n is the length of the rear part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by formula (3):
Rc＝L-(Ra+Rb) (3)
in the formula (2), Rc is the length of the third connecting rod, and L is the arc length of the first plate spring;
and taking the actual length corresponding to the lifting lug of the plate spring as the length of the lifting lug in the equivalent model of the plate spring.
Further, referring to fig. 3, in the leaf spring equivalent model, a point corresponding to the center of the leaf spring is located on the second link, and a distance between the point corresponding to the center of the leaf spring and a connection point of the first link and the second link is:
d＝a-Ra
wherein d is a distance between a point corresponding to the center of the leaf spring and a connection point of the first link and the second link.
That is, through the above calculation, the plate spring is divided into three sections of Ra, Rb and Rc, for example, as shown in fig. 4, that is, a first link, a second link and a third link corresponding to an equivalent model of the plate spring, so that the plate spring structure is greatly simplified, the plate spring is combined with the whole suspension mechanism, dynamic simulation of the whole suspension system is facilitated, high-approximation plate spring motion simulation is achieved, dynamic analysis of suspension tilt bounce can be achieved, and guidance is facilitated for design of front peripheral parts.
The acquisition module 130 is used to acquire a dynamically simulated hard-point skeleton-level model of the suspension.
In a specific embodiment, the process of obtaining a dynamically simulated hard point skeleton-level model of a suspension comprises: the method comprises the steps of obtaining a corresponding dynamic simulation hard point skeleton model of a suspension from a preset model database, wherein the preset model database comprises a plurality of simulation models and at least comprises the dynamic simulation hard point skeleton model of the suspension. In other words, the dynamic simulation hard point skeleton model of the suspension is preset, and can be called and used according to requirements through the model database when in actual use.
The analysis module 140 is configured to input data parameters of the leaf spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model, so as to obtain kinematic characteristic data corresponding to the suspension and the leaf spring.
In one embodiment of the present invention, the preset suspension dynamic parameters at least include: a bounce drive parameter applied to the front and rear suspensions, a corner drive parameter applied to the steering system, and a traverse drive parameter applied to the front axle.
That is, the data parameters of the leaf spring equivalent model calculated by the calculation module 120, and the preset suspension dynamic parameters such as the bounce driving parameters applied to the front and rear suspensions, the corner driving parameters applied to the steering system, and the sideslip driving parameters applied to the front axle are input into the dynamic simulation hard point skeleton model, and the kinematic characteristic data corresponding to the suspension and the leaf spring are obtained through model operation and analysis. In a specific example, the kinematic characteristic data of the suspension and the leaf spring comprise at least: the motion trail of the plate spring and the motion boundary of the suspension under different working conditions. Therefore, the plate spring and the whole suspension mechanism are combined conveniently, integrity and subsequent boundary setting of dynamic analysis of the suspension system are facilitated, dynamic simulation of the whole suspension system is facilitated, high-approximation degree plate spring motion simulation is achieved, dynamic analysis of suspension inclination jumping is achieved, and guiding effect on design of front peripheral parts is facilitated.
In a specific embodiment, for example, after obtaining a leaf spring equivalent model, such as a three-bar linkage, the three-segment leaf spring is put into a dynamic simulation hard point skeleton model of a suspension, such as a simulation mechanism of a double-front-axle suspension system, the leaf spring and other parts are constrained, bouncing drive is applied to front and rear suspensions, corner drive is applied to a steering system, and traversing drive is applied to two front axles, so that the leaf spring is combined with the whole suspension mechanism, a simulation analysis process is completed, kinematic characteristic data such as a motion track of the leaf spring and motion boundaries of the suspension under different working conditions are accurately obtained, and guidance effect on design of parts around the front is facilitated.
Therefore, the embodiment of the invention can simplify the arc shape of the plate spring into a rod-type structure, and design the dynamic mechanism according to the thought, namely, the steel plate spring is combined with the whole suspension mechanism, so that the dynamic simulation of the whole suspension system is facilitated, the motion analysis of the plate spring with high approximation degree is realized, and the dynamic analysis of the suspension inclination bounce is realized.
It should be noted that the specific implementation manner of the suspension and the leaf spring motion analysis system is similar to that of the suspension and the leaf spring motion analysis method described in any of the above embodiments of the present invention, and please refer to the description of the method section specifically, and details are not described here again in order to reduce redundancy.
According to the suspension and the leaf spring motion analysis system provided by the embodiment of the invention, the leaf spring is subjected to sectional simulation processing to obtain a leaf spring equivalent model; calculating data parameters of a leaf spring equivalent model; acquiring a dynamic simulation hard point skeleton model of a suspension; and inputting the data parameters of the leaf spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model to obtain the kinematic characteristic data corresponding to the suspension and the leaf spring. Therefore, the system can simplify the plate spring into a plate spring equivalent model, so that the plate spring is combined with the whole suspension mechanism, the dynamic simulation of the whole suspension system is facilitated, the motion simulation of the plate spring with high approximation degree is realized, the dynamic analysis of the inclination and the bounce of the suspension is realized, and the design of peripheral parts at the front part is facilitated to be guided.
A further embodiment of the present invention also provides a computer-readable storage medium having a suspension and leaf spring motion analysis program stored thereon, which when executed by a processor, implements the suspension and leaf spring motion analysis method as described in any one of the above-mentioned embodiments of the present invention.
According to the computer-readable storage medium provided by the embodiment of the invention, the leaf spring can be simplified into a leaf spring equivalent model, so that the leaf spring and the whole suspension mechanism are combined, the dynamic simulation of the whole suspension system is favorably realized, the motion simulation of the leaf spring with high approximation degree is further realized, the dynamic analysis of the inclination and the bounce of the suspension is realized, and the design of peripheral parts at the front part is favorably guided.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "a plurality" means two or more.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. A suspension and a leaf spring motion analysis method are characterized by comprising the following steps:
carrying out segmented simulation processing on the plate spring to obtain a plate spring equivalent model;
calculating data parameters of the plate spring equivalent model;
acquiring a dynamic simulation hard point skeleton model of a suspension;
and inputting the data parameters of the leaf spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model to obtain the kinematic characteristic data corresponding to the suspension and the leaf spring.
2. The suspension and leaf spring motion analysis method of claim 1, wherein the step of performing a piecewise simulation on the leaf spring to obtain a leaf spring equivalent model comprises:
according to the actual parameters of the plate spring under the action of the vertical load, the plate spring is simplified into a plate spring equivalent model, wherein the plate spring equivalent model is configured into a three-link mechanism, and the three-link mechanism comprises a first connecting rod, a second connecting rod and a lifting lug, wherein the first connecting rod, the second connecting rod and the third connecting rod are sequentially connected, and the lifting lug is connected with one end of the third connecting rod.
3. The suspension and leaf spring motion analysis method of claim 2, wherein the calculating data parameters of the leaf spring equivalent model comprises:
calculating the length of the first connecting rod by equation (1):
Ra＝0.75(a-m) (1)
in the formula (1), Ra is the length of the first connecting rod, a is the arc length of the front half section of the plate spring, and m is the length of the front part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by the formula (2):
Rb＝0.75(b-n) (2)
in the formula (2), Rb is the length of the second connecting rod, b is the arc length of the rear half section of the plate spring, and n is the length of the rear part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by formula (3):
Rc＝L-(Ra+Rb) (3)
in the formula (2), Rc is the length of the third connecting rod, and L is the arc length of the first plate spring;
and taking the length corresponding to the lifting lug of the plate spring as the length of the lifting lug.
4. The suspension and leaf spring motion analysis method according to claim 3, wherein a point corresponding to a leaf spring center in the leaf spring equivalent model is located on the second link, and a distance between the point corresponding to the leaf spring center and a connection point of the first link and the second link is:
d＝a-Ra
wherein d is a distance between the point corresponding to the center of the plate spring and a connection point of the first link and the second link.
5. The suspension and leaf spring motion analysis method of claim 1, wherein the predetermined suspension dynamics parameters include at least: a bounce drive parameter applied to the front and rear suspensions, a corner drive parameter applied to the steering system, and a traverse drive parameter applied to the front axle.
6. The suspension and leaf spring motion analysis method of claim 1, wherein the kinematic characteristic data of the suspension and leaf spring at least comprises: the motion trail of the plate spring and the motion boundary of the suspension under different working conditions.
7. A suspension and leaf spring motion analysis system comprising:
the simulation module is used for carrying out segmented simulation processing on the plate spring to obtain a plate spring equivalent model;
the calculating module is used for calculating data parameters of the plate spring equivalent model;
the acquisition module is used for acquiring a dynamic simulation hard point skeleton model of the suspension;
and the analysis module is used for inputting the data parameters of the plate spring equivalent model and preset suspension dynamic parameters into the dynamic simulation hard point skeleton model to obtain the kinematic characteristic data corresponding to the suspension and the plate spring.
8. The suspension and leaf spring motion analysis system of claim 7, wherein the simulation module is configured to:
according to the actual parameters of the plate spring under the action of the vertical load, the plate spring is simplified into a plate spring equivalent model, wherein the plate spring equivalent model is configured into a three-link mechanism, and the three-link mechanism comprises a first connecting rod, a second connecting rod and a lifting lug, wherein the first connecting rod, the second connecting rod and the third connecting rod are sequentially connected, and the lifting lug is connected with one end of the third connecting rod.
9. The suspension and leaf spring motion analysis system of claim 8, wherein the computing module is configured to:
calculating the length of the first connecting rod by equation (1):
Ra＝0.75(a-m) (1)
in the formula (1), Ra is the length of the first connecting rod, a is the arc length of the front half section of the plate spring, and m is the length of the front part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by the formula (2):
Rb＝0.75(b-n) (2)
in the formula (2), Rb is the length of the second connecting rod, b is the arc length of the rear half section of the plate spring, and n is the length of the rear part of the U-shaped bolt of the plate spring;
calculating the length of the second connecting rod by formula (3):
Rc＝L-(Ra+Rb) (3)
in the formula (2), Rc is the length of the third connecting rod, and L is the arc length of the first plate spring;
and taking the length corresponding to the lifting lug of the plate spring as the length of the lifting lug.
10. The suspension and leaf spring motion analysis system of claim 9, wherein the leaf spring equivalent model has a point corresponding to the center of the leaf spring on the second link, and the distance between the point corresponding to the center of the leaf spring and the connection point of the first link and the second link is:
d＝a-Ra
wherein d is a distance between the point corresponding to the center of the plate spring and a connection point of the first link and the second link.
11. A computer-readable storage medium, wherein a suspension and leaf spring motion analysis program is stored thereon, and when executed by a processor, implements the suspension and leaf spring motion analysis method according to any one of claims 1 to 6.
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