CN116628855A

CN116628855A - Method, device, system, equipment and medium for designing body suspension based on benchmarking

Info

Publication number: CN116628855A
Application number: CN202310624420.6A
Authority: CN
Inventors: 左剑
Original assignee: Deli New Energy Vehicle Co ltd
Current assignee: Deli New Energy Vehicle Co ltd
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-08-22

Abstract

Target-based vehicle body suspension design method, device, system, equipment and medium, wherein the method comprises the following steps: acquiring space arrangement of the target vehicles and the design vehicles, and determining the suspension quantity of the design vehicles based on the space arrangement of the target vehicles; determining the suspension type of each point of the design vehicle based on the result of the modal vibration of the frame of the design vehicle; determining the deformation of the suspension based on the static load stress and the spatial arrangement of the suspension of the design vehicle, and determining the static rigidity of the suspension of the design vehicle based on the deformation; and determining the dynamic stiffness of the target vehicle suspension based on the vibration isolation transmissibility of the target vehicle suspension, the self-vibration frequency obtained by calculation and analysis of the design vehicle suspension and the decomposition mass of the design vehicle suspension. According to the invention, the suspension parameters and types of the design vehicle are determined according to the suspension parameters of the standard vehicle, the vibration isolation transmissibility of the design vehicle is set according to the static stiffness and the vibration isolation transmissibility of the suspension of the standard vehicle, and the self-vibration frequency and the dynamic stiffness of the design vehicle are calculated, so that the rapid design of the suspension is realized, the stability and NVH performance of the suspension are improved, and the disassembly and repair during adjustment are reduced.

Description

Method, device, system, equipment and medium for designing body suspension based on benchmarking

Technical Field

The invention belongs to the technical field of vehicle target design, and particularly relates to a target-based vehicle body suspension design method, device, system, equipment and medium.

Background

The existing non-bearing type car body has the advantages of high strength, good trafficability, small jolting feeling and the like, is widely applied to pick-up cards, off-road vehicles and trucks, and has important effects on NVH noise, vibration and harshness (Noise, vibration, harshness) and operation stability of the whole car when the car body is suspended to serve as a tie for connecting the frame and the car body. In addition, the vehicle body suspension is used as a connection point of the vehicle body and the vehicle frame and is mainly used for absorbing vibration transmitted from the chassis so as to ensure the running stability of the vehicle. The existing new vehicle type vehicle body suspension is generally designed by an old vehicle type or directly designed by a standard vehicle type, and the quality and suspension positions and distribution of different vehicle bodies are different, so that the stability and NVH performance of the actual vehicle body type operation in the later stage are often reduced due to the difference of the suspension positions and the suspension distribution, and the problems that the actual designed vehicle type needs to be frequently disassembled and repaired in the matching and adjusting process are solved.

Disclosure of Invention

The invention provides a target-based vehicle body suspension design method, which comprises the following steps: acquiring space arrangement of the target vehicles and the design vehicles, and determining the number of the suspension bodies of the design vehicles based on space arrangement parameters of the target vehicles; determining the type of each point body suspension of the design vehicle based on an analysis result of computer-aided engineering analysis of the modal vibration of the frame of the design vehicle; determining actual deformation of each point of the vehicle body suspension based on static load stress of each point of the vehicle body suspension of the design vehicle and space arrangement of the frame and the vehicle body of the design vehicle, and determining static rigidity of the vehicle body suspension of the design vehicle based on the actual deformation; based on vibration isolation transmissibility of each point suspension of the standard vehicle, self-vibration frequency obtained by computer-aided engineering analysis of each point suspension of the design vehicle and decomposition quality of each point vehicle body suspension of the design vehicle, dynamic stiffness of the design vehicle body suspension is determined, so that the problems that the design vehicle body suspension is difficult to design quickly, stability and NVH performance of the design vehicle body suspension are poor, and disassembly and repair are often required during adjustment are solved.

The aim and the technical problems of the invention are realized by adopting the following technical proposal.

The invention provides a target-based vehicle body suspension design method, which comprises the following steps:

acquiring space arrangement of the target vehicles and the design vehicles, and determining the number of the suspension bodies of the design vehicles based on space arrangement parameters of the target vehicles;

determining the type of each point body suspension of the design vehicle based on an analysis result of computer-aided engineering analysis of the modal vibration of the frame of the design vehicle;

determining actual deformation of each point of the vehicle body suspension based on static load stress of each point of the vehicle body suspension of the design vehicle and space arrangement of the frame and the vehicle body of the design vehicle, and determining static rigidity of the vehicle body suspension of the design vehicle based on the actual deformation;

and determining the dynamic stiffness of the body suspension of the design vehicle based on the vibration isolation transmissibility of the body suspension of each point of the standard vehicle, the self-vibration frequency obtained by computer-aided engineering analysis of the body suspension of each point of the design vehicle and the decomposition mass decomposed into the body suspension of each point of the design vehicle.

Optionally, the determining the number of the body suspensions of the design vehicle based on the spatial arrangement parameters of the target vehicle includes:

and determining the number of the body suspensions of the design vehicle as three to five pairs based on the spatial arrangement parameters of the target vehicle.

Optionally, the computer aided engineering analysis of the modal vibration of the frame of the design vehicle comprises:

and determining the type of each suspension point of the design vehicle based on the deformation condition of the design vehicle under the stress of each suspension point under the working conditions of torsion bending vibration mode, vertical bending vibration mode, transverse bending vibration mode and lateral bending vibration mode.

Optionally, the determining the actual deformation of each point of the suspension based on the static load stress of each point of the suspension and the spatial arrangement of the frame and the body of the design vehicle, and determining the static stiffness of the suspension based on the actual deformation includes:

in the no-load and full-load states, respectively acquiring the static load of the suspension of the vehicle body mass to each point as the static load stress of the suspension of the vehicle body of each point of the design vehicle;

calculating the actual deformation of the size between the frame and the vehicle body after each point of vehicle body suspension compression respectively based on the arrangement space of the designed vehicle frame and the vehicle body;

calculating the static rigidity of the suspension of the designed vehicle body based on a calculation formula (1) of matching the static rigidity with the actual deformation;

wherein K is _{Static state} For the static rigidity of the suspension of the design vehicle, M is the decomposition mass of the design vehicle in the vertical direction of the suspension; g is gravity acceleration; delta is the actual deflection of the design vehicle suspension.

Optionally, the determining the dynamic stiffness of the design vehicle body suspension based on the vibration isolation transmissibility of the target vehicle point suspension and the self-vibration frequency obtained by the computer-aided engineering analysis of the design vehicle point suspension and the decomposition mass of the design vehicle point body suspension includes:

acquiring dynamic stiffness of a target vehicle suspension and modal frequency of a vehicle frame based on a part test of the target vehicle;

calculating the self-vibration frequency of the vehicle frame of the target vehicle according to the (2) based on the dynamic stiffness of the suspension of the target vehicle and the decomposition mass of the target vehicle in the vertical direction of the suspension of each point of the target vehicle;

calculating vibration isolation transmissibility of the target vehicle suspension according to the mode frequency of the target vehicle frame and the self-vibration frequency of the target vehicle according to the formula (3);

wherein beta is _{Label (C)} For vibration isolation transmissibility of the standard vehicle suspension, K _{Dynamic mark} For the dynamic rigidity of the suspension of the target vehicle, M _{Label (C)} F for decomposing the target vehicle to a decomposition mass in the vertical direction of suspension _{n is marked} To aim at the self-vibration frequency of the standard vehicle, F _{f mark} The mode frequency of the opposite vehicle frame.

Optionally, the determining the dynamic stiffness of the design vehicle body suspension based on the vibration isolation transmissibility of the target vehicle point suspension, the self-vibration frequency obtained by the computer-aided engineering analysis of the design vehicle point suspension, and the decomposition mass of the design vehicle point body suspension further comprises:

Calculating the self-vibration frequency of the design vehicle according to the mode frequency (4) by combining the vibration isolation transmissibility of each point suspension of the design vehicle and the computer-aided engineering analysis of the frame of the design vehicle; and

determining the dynamic stiffness of the suspension of the design vehicle according to the method (5) based on the self-vibration frequency of the design vehicle and the decomposition mass of the suspension of each point of the design vehicle;

wherein beta is _{Is provided with} To design the vibration isolation transmissibility of the vehicle suspension, beta _{Is provided with} ≤β _{Label (C)} ，K _{Movable device} To design the dynamic stiffness of the vehicle suspension, M _{Is provided with} To design the decomposition mass of the vehicle to the vertical direction of the suspension of each point of the vehicle body, F _{n is provided with} To design the self-vibration frequency of the vehicle F _{f is provided with} To design the modal frequency of the vehicle frame.

Alternatively, the suspension of the design vehicle is arranged in the form of a rubber suspension.

The invention also provides a vehicle body suspension design device based on the calibration, which comprises:

the suspension number setting unit is used for obtaining the space arrangement of the target vehicle and the design vehicle and determining the vehicle body suspension number of the design vehicle based on the space arrangement parameters of the target vehicle;

the suspension type judging unit is used for determining the type of suspension of each point of the vehicle body of the design vehicle based on the analysis result of the computer-aided engineering analysis of the modal vibration of the frame of the design vehicle;

the static stiffness design unit is used for determining the actual deformation of each point of the vehicle body suspension based on the static load stress of each point of the vehicle body suspension of the design vehicle and the space arrangement of the frame and the vehicle body of the design vehicle, and determining the static stiffness of the vehicle body suspension of the design vehicle based on the actual deformation;

And the dynamic stiffness design unit is used for determining the dynamic stiffness of the body suspension of the design vehicle based on the vibration isolation transmissibility of the point suspension of the standard vehicle, the self-vibration frequency obtained by the computer-aided engineering analysis of the point suspension of the design vehicle and the decomposition mass of the body suspension of the point of the design vehicle.

The invention also provides a target-based vehicle body suspension design system, which comprises the target-based vehicle body suspension design device, wherein the system comprises:

the acquisition unit is used for acquiring and reporting data information of at least one unit of the suspension quantity setting unit, the suspension type judging unit, the static stiffness design unit and the dynamic stiffness design unit;

the processing unit is used for acquiring the data information reported by the acquisition unit, analyzing and processing the data based on the reported data information, generating control instruction information based on the processing result and outputting the control instruction information;

and the control unit is used for acquiring the control instruction information output by the processing unit and controlling at least one of the suspension quantity setting unit, the suspension type judging unit, the static stiffness design unit and the dynamic stiffness design unit so that the controlled unit can complete the corresponding design in suspension design.

The invention also provides an electronic device, comprising:

a memory for storing non-transitory computer readable instructions; and

a processor for executing the computer readable instructions such that the computer readable instructions when executed by the processor implement the benchmarking-based vehicle body suspension design method of any of the above.

The present invention also provides a computer readable storage medium comprising computer instructions which, when run on an apparatus, cause the apparatus to perform a benchmarking-based body suspension design method as described above.

Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the invention has at least one of the following advantages and beneficial effects:

1. the invention provides a target-based vehicle body suspension design method, which comprises the following steps: acquiring space arrangement of the target vehicles and the design vehicles, and determining the number of the suspension bodies of the design vehicles based on space arrangement parameters of the target vehicles; determining the type of each point body suspension of the design vehicle based on an analysis result of computer-aided engineering analysis of the modal vibration of the frame of the design vehicle; determining actual deformation of each point of the vehicle body suspension based on static load stress of each point of the vehicle body suspension of the design vehicle and space arrangement of the frame and the vehicle body of the design vehicle, and determining static rigidity of the vehicle body suspension of the design vehicle based on the actual deformation; based on vibration isolation transmissibility of each point suspension of the standard vehicle, self-vibration frequency obtained by computer-aided engineering analysis of each point suspension of the design vehicle and decomposition quality of each point vehicle body suspension of the design vehicle, dynamic stiffness of the design vehicle body suspension is determined, so that the problems that the design vehicle body suspension is difficult to design quickly, stability and NVH performance of the design vehicle body suspension are poor, and disassembly and repair are often required during adjustment are solved. According to the invention, the vehicle body suspension parameters and types of the design vehicle are determined according to the standard vehicle suspension parameters, the vibration isolation transmissibility of each point suspension of the design vehicle is set according to the static rigidity and the vibration isolation transmissibility of the vehicle body suspension of the standard vehicle, and the self-vibration frequency and the dynamic rigidity of the design vehicle are calculated, so that the rapid design of the vehicle body suspension of the design vehicle is realized, the stability and NVH performance of the vehicle body suspension of the design vehicle are improved, and the disassembly and repair during the adjustment of the vehicle body suspension of the design vehicle are reduced.

2. The method for determining the number of the suspension bodies of the design vehicle based on the space arrangement parameters of the target vehicle comprises the following steps: determining three to five pairs of body suspension numbers of the design vehicle based on the space arrangement parameters of the target vehicle; and based on the deformation conditions of the design vehicle under the working conditions of torsion bending vibration mode, vertical bending vibration mode, transverse bending vibration mode and lateral bending vibration mode of each suspension point stress, the type of each suspension point vehicle body suspension of the design vehicle is determined, so that the type of each suspension point vehicle body suspension of the design vehicle is determined according to the stress of each suspension point and the corresponding actual deformation quantity conditions, the matching performance of each suspension point vehicle body suspension of the design vehicle is ensured, the stability and NVH performance of the suspension point vehicle body suspension of the design vehicle are improved, and the disassembly and repair during the adjustment of the suspension point vehicle body suspension of the design vehicle are reduced.

3. The invention provides a vehicle body suspension design device based on a target, which comprises: the suspension number setting unit is used for obtaining the space arrangement of the target vehicle and the design vehicle and determining the vehicle body suspension number of the design vehicle based on the space arrangement parameters of the target vehicle; the suspension type judging unit is used for determining the type of suspension of each point of the vehicle body of the design vehicle based on the analysis result of the computer-aided engineering analysis of the modal vibration of the frame of the design vehicle; the static stiffness design unit is used for determining the actual deformation of each point of the vehicle body suspension based on the static load stress of each point of the vehicle body suspension of the design vehicle and the space arrangement of the frame and the vehicle body of the design vehicle, and determining the static stiffness of the vehicle body suspension of the design vehicle based on the actual deformation; and the dynamic stiffness design unit is used for determining the dynamic stiffness of the body suspension of the design vehicle based on the vibration isolation transmissibility of the point suspension of the standard vehicle, the self-vibration frequency obtained by the computer-aided engineering analysis of the point suspension of the design vehicle and the decomposition mass of the body suspension of the point of the design vehicle. According to the design device for the vehicle body suspension based on the calibration, the rapid design of the vehicle body suspension of the design vehicle is realized, the stability and NVH performance of the vehicle body suspension of the design vehicle are improved, and the disassembly and repair during the adjustment are reduced.

4. The invention provides a target-based vehicle body suspension design system, which comprises the target-based vehicle body suspension design device, wherein the system comprises: the acquisition unit is used for acquiring and reporting data information of at least one unit of the suspension quantity setting unit, the suspension type judging unit, the static stiffness design unit and the dynamic stiffness design unit; the processing unit is used for acquiring the data information reported by the acquisition unit, analyzing and processing the data based on the reported data information, generating control instruction information based on the processing result and outputting the control instruction information; and the control unit is used for acquiring the control instruction information output by the processing unit and controlling at least one of the suspension quantity setting unit, the suspension type judging unit, the static stiffness design unit and the dynamic stiffness design unit so that the controlled unit can complete the corresponding design in suspension design. According to the design system for the vehicle body suspension based on the calibration, the rapid design of the vehicle body suspension of the design vehicle is realized, the stability and NVH performance of the vehicle body suspension of the design vehicle are improved, and the disassembly and repair during the adjustment are reduced.

5. The present invention provides an electronic device including: a memory for storing non-transitory computer readable instructions; and a processor configured to execute the computer readable instructions such that the computer readable instructions, when executed by the processor, implement the benchmarking-based vehicle body suspension design method described above.

6. The present invention provides a computer readable storage medium comprising computer instructions which, when run on a device, cause the device to perform the above-described benchmarking-based body suspension design method.

The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.

Drawings

FIG. 1 is a schematic flow chart of a method for designing a target-based body suspension according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of a design of a target-based body suspension according to an embodiment of the present invention;

FIG. 3 is a schematic illustration of a target-based body suspension design system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the invention with reference to the attached drawings and the preferred embodiments.

The invention provides a method for designing a vehicle body suspension based on a target, as shown in fig. 1, comprising the following steps:

s1, acquiring space arrangement of a target vehicle and a design vehicle, and determining the vehicle body suspension number of the design vehicle based on space arrangement parameters of the target vehicle;

s2, determining the type of each point of the vehicle body suspension of the design vehicle based on an analysis result of computer-aided engineering analysis of the modal vibration of the frame of the design vehicle;

s3, determining actual deformation of each point of the vehicle body suspension based on static load stress of each point of the vehicle body suspension of the design vehicle and space arrangement of the frame and the vehicle body of the design vehicle, and determining static rigidity of the vehicle body suspension of the design vehicle based on the actual deformation;

s4, determining the dynamic stiffness of the body suspension of the design vehicle based on vibration isolation transmissibility of the point suspension of the standard vehicle, self-vibration frequency obtained by computer-aided engineering analysis of the point suspension of the design vehicle and decomposition quality of the body suspension of the point suspension of the design vehicle.

In the embodiment of the present invention, a pickup truck type is used as a target truck, and a truck suspension of a design vehicle type corresponding to the pickup truck type is designed, and referring to the target pickup truck type truck suspension as an example, the target pickup truck type is subjected to a computer aided engineering-based mode simulation for frame mode vibration according to actual spatial arrangement and parameters (such as a whole car size, a car head size, a car body size, a cabin size, and spatial positions near the car head, the car body, the cabin, the passenger cabin, the a pillar and the B pillar) of the target pickup truck type, and A, B, C, D four-group-position truck suspensions are respectively arranged at four spatial positions near the front cabin front end, the a pillar, the passenger cabin and the B pillar, wherein the A, B, C, D four-group-position truck suspensions are subjected to a computer aided engineering-based mode simulation for frame mode vibration, and the A, B, C, D four-group-position truck suspension results are respectively compared and analyzed. The simulation of the vehicle body suspension modes at the positions of the A and C groups is not limited to the mode simulation of multiple types and multiple groups by at least one of a custom type or a torsional bending vibration mode, a vertical bending vibration mode, a transverse bending vibration mode and a lateral bending vibration mode, and the simulation data of the vehicle body suspension modes at the positions of the A, B, C, D four groups are obtained. According to the results of calculating A, B, C, D vehicle body suspension mode simulation data of four groups of positions of A, B, C, D and analyzing the actual deformation of the vehicle body suspension points of the four groups of positions of A, B, C, D, the analysis shows that the point A and the point C are suspended in the first-order torsion and first-order vertical bending mode simulation of the vehicle frame and mainly deform vertically, and the suspension type of the spatial arrangement of the point A and the point C is set to be a compression suspension type according to the vertical deformation type in the mode simulation. Similarly, it is found through analysis that the suspension of the point B and the point D generates larger lateral deformation in the simulation process of the first-order lateral bending mode of the vehicle frame, so that the suspension type of the spatial arrangement of the positions of the point B and the point D is set to be a shear type suspension type with larger lateral rigidity, and the suspension stress conditions of the vehicle body at the four positions A, B, C, D are respectively counted and analyzed as shown in the following table 1:

Table 1: decomposition mass corresponding to full-load and empty vehicle body suspension points of standard pick-up truck at A, B, C and D four groups

	Whole vehicle quality	First suspension point A	Second suspension B point	Third suspension C point	Fourth suspension D point
						Full load decomposition mass (kg)	1000	235	255	255	255
No-load decomposition mass (kg)	600	141	153	153	153

In the embodiment of the present invention, as shown in table 1, taking the stiffness of the design fourth suspension point D as an example, and taking the actual preset spatial arrangement as a limitation, if the free height of the shear suspension is 40mm, the deformation of the rubber suspension is generally 15% -30% in the free state, so the compression deformation is 6mm-12mm, and the fourth suspension static stiffness is 333N/mm (considering 15% of manufacturing errors) can be calculated according to the following calculation formula (1) in which the static stiffness is matched with the actual deformation;

wherein K is _{Static state} For the static rigidity of the suspension of the design vehicle, M is the decomposition mass of the design vehicle in the vertical direction of the suspension; g is gravity acceleration; delta is the actual deflection of the design vehicle suspension. If the decomposition masses without load and with full load are respectively brought into (1) in turn to calculate the static rigidity K _{Empty space} And K _{Full of} The following are provided:

respectively calculating the static stiffness K of the no-load decomposition mass and the full-load decomposition mass _{Empty space} And K _{Full of} Calculating the mean value to obtain a static stiffness value K of the designed fourth suspension point D _{Static state} 。

According to vibration isolation transmissibility beta of points of the opposite vehicle, such as a first suspension A point, a second suspension B point, a third suspension C point and a fourth suspension D point _{Label (C)} Performing part test on the target vehicle to obtain the dynamic stiffness K of the target vehicle suspension _{Dynamic mark} And modal frequency F of the frame _{f mark} Calculating the self-vibration frequency of the standard vehicle frame through the following formula (2); and calculating vibration isolation transmissibility beta of the target vehicle suspension through a vibration isolation transmission calculation formula (3) _{Label (C)} ；

Vibration isolation transmissibility beta of a pickup truck type suspension _{Label (C)} Based on bench test and calculation, at this time, the vibration isolation transmissibility β for the design of the pick-up truck type suspension was 20% _{Is provided with} Selected from vibration isolation transmissibility beta _{Label (C)} Values within the range of (i.e. beta) _{Is provided with} ≤β _{Label (C)} Less than or equal to 20 percent, so the vibration isolation transmissibility beta of the suspension of the pickup truck is designed _{Is provided with} The modal frequency F of the first-order torsional rigidity design vehicle frame of the vehicle frame is less than or equal to 20 percent _{f is provided with} At 20Hz, vibration isolation transmissibility beta based on suspension of each point of design vehicle _{Is provided with} The self-vibration frequency F of the designed pick-up car model is calculated according to the formula (4) by combining the mode frequency of the computer aided engineering analysis of the designed car frame _{n is provided with} 。

That is to say,and the self-oscillation frequency F based on the design vehicle and calculated according to the bench test _{n is provided with} And a decomposition mass M decomposed to the suspension of each point of the design vehicle _{Is provided with} Determining the dynamic stiffness K of the suspension of the design vehicle according to the formula (5) _{Movable device} The following are provided:

wherein beta is _{Is provided with} To design the vibration isolation transmissibility of the vehicle suspension, beta _{Is provided with} ≤β _{Label (C)} ，K _{Movable device} To design the dynamic stiffness of the vehicle suspension, M _{Is provided with} To design the decomposition mass of the vehicle to the vertical direction of the suspension of each point of the vehicle body, F _{n is provided with} To design the self-vibration frequency of the vehicle F _{f is provided with} In order to design the modal frequency of the frame of the vehicle, the dynamic stiffness K of the suspension D point at the fourth point of the vehicle is designed _{Movable device} I.e.By combining the suspension performance of the rubber, the static rigidity of the suspension of the rubber is 333 (1+/-15%) N/mm according to the dynamic-static ratio (the ratio of dynamic rigidity to static rigidity) of 1.32-2.2, so that the dynamic rigidity value is (440-733) (1+/-15%) N/mm, wherein (+/-15%) is the manufacturing error of 15% is considered.

Under the condition that the excitation of the vibration source is the same, the lower the dynamic stiffness is, the better the vibration isolation rate is, so the dynamic stiffness of the design of the pickup suspension is smaller than 406N/mm. Similarly, the dynamic stiffness and static stiffness values of the suspension of other points such as the first suspension point A, the second suspension point B and the third suspension point C can be calculated by adopting the calculation method until the dynamic stiffness and static stiffness values of the suspension of the design pick-up car model meeting the requirements at the first suspension point A, the second suspension point B, the third suspension point C and the third suspension point D are designed, and the specific calculation process is referred to the calculation steps and is not repeated herein.

In the design process of the invention, each suspension point selected in the design process can be referred to and compared and analyzed according to a certain space arrangement rule to determine whether the suspension performance in a specific space arrangement area of the design meets the design requirement. If the passenger cabin area at the front end of the vehicle can be selected for research design, the suspension points in the middle of the passenger cabin, the suspension points near the A column at the left side of the passenger cabin and the suspension points near the B column at the right side of the passenger cabin are spatially arranged according to the positions of the three suspension points, so that suspension parameters such as self-vibration frequency, modal frequency, static rigidity, dynamic rigidity, vibration isolation transmissibility of suspensions at corresponding positions of a target vehicle and vibration isolation transmissibility value of suspension of the designed vehicle can be known after the design, and whether the suspension performance in the passenger cabin meets the design requirements (including the stability and NVH performance of the vehicle body suspension) in the designed specific spatially arranged area can be known by analyzing and comparing the suspension parameter values of the three suspension points. In the design process of the invention, the method also comprises reliable road test verification of the mileage of more than 15000km on the pick-up truck type designed based on the target vehicle body suspension design method, and the appearance and the structure of the designed pick-up truck type vehicle body suspension can be known to be in a normal state after the reliable road test verification; and further measuring and calculating the dynamic stiffness and the static stiffness values of the first suspension A point, the second suspension B point, the third suspension C point and the third suspension D point, wherein the dynamic stiffness and the static stiffness values of the road test verification have smaller changes, and the road test verification meets the design requirements of the vehicle body suspension based on the standard.

The invention solves the problem of vehicle body suspension design of a main engine factory, and provides a reliable vehicle body suspension design method. According to the invention, the vehicle body suspension parameters and types of the design vehicle are determined through the vehicle body suspension parameters of the target vehicle, the vibration isolation transmissibility of each point suspension of the design vehicle is set according to the static rigidity and the vibration isolation transmissibility of the vehicle body suspension of the target vehicle, the self-vibration frequency and the dynamic rigidity of the design vehicle are calculated, and the vibration isolation transmissibility beta of the suspension of the design vehicle is enabled through the target alignment of the dynamic rigidity of the target vehicle _{Is provided with} Reaching the level of the trolley and above,the rapid design process of the designed vehicle body suspension is realized, the stability and NVH performance of the designed vehicle body suspension are improved through the design method through the matching design process of the steps and the subsequent reliable road test verification through long mileage.

According to the design method for the vehicle body suspension based on the standard, the characteristics of the suspension are referred to for the design of the static rigidity of the vehicle body suspension, for example, the deformation of the rubber suspension is adopted to participate in actual design and development, so that the strength and the rigidity of the design Picard vehicle body suspension are ensured, and the rigidity of the design vehicle frame meets the requirement of stable running.

According to the design vehicle model designed based on the target vehicle body suspension design method, in the subsequent actual use process, if the stability and NVH performance of the vehicle body suspension are found to be reduced, the static stiffness and dynamic stiffness values and the range of the static stiffness values of the selected or designed point suspensions can be tested, so that the spatial layout and structural connection near the target suspension point can be quickly confirmed and calibrated, the cost of the new vehicle type suspension design is saved, the problem that the vehicle body suspension requirement of the actual vehicle type in the later period is poor in matching due to the fact that the suspension of the new vehicle type directly imitates the suspension of other vehicle types is effectively avoided, and the problem that the vehicle body suspension needs to be frequently disassembled and repaired in the actual use process is solved.

In the design process of the target-based vehicle body suspension, the number of suspension points is determined according to the attributes and attribute values of the length, the quality, the application, the installation mode and the like of the designed vehicle power assembly. When the number of the designed vehicle body suspensions is three pairs based on the spatial arrangement parameters of the target vehicle, each pair of vehicle body suspension numbers calibrate one vehicle body suspension point, and the three pairs of vehicle body suspension numbers calibrate three vehicle body suspension points. The number of the suspended bodies adopts a three-point (namely 3 pairs) mode, the three suspended points of the bodies determine a plane, the influence of deformation of the designed vehicle body frame is avoided, the natural frequency of the bodies is low, and the anti-torsion vibration effect is good. It may be further preferable that the front cabin is suspended in such a manner that two points of front left and front right sides are obliquely arranged and one point of rear end is abutted against the main axis of inertia, and the number of three-point vehicle body suspensions of this form has a good vibration isolation performance. Also, the arrangement of the front end with a point close to the main inertia shaft and the rear left and rear right inclined ends is not limited, and the vibration isolation performance can be better.

In an embodiment of the invention, the number of corresponding vehicle body suspensions can be selected based on the model number of the cylinder of the designed vehicle engine, for example, the four-cylinder engine and the six-cylinder engine have larger torque reaction force, the required torsional rigidity is large, the low-frequency vibration characteristic is obvious, the four-point vehicle body suspensions are respectively and symmetrically arranged at two points at two sides of the front end of the designed vehicle, and the two sides of the rear end of the designed vehicle are respectively and symmetrically arranged at two points. Preferably four-point symmetrical arrangement, the spatial arrangement has the advantage of overcoming larger torque reaction force and simultaneously can keep good stability.

In an embodiment of the invention, a space arrangement mode for increasing the suspension quantity to five points can be adopted for a heavy vehicle, for example, in the suspension design of a heavy truck, the mass and the length of a power assembly are large, a large bending moment is easily generated between an engine and a flywheel shell surface, and an auxiliary fulcrum is additionally arranged on a speed changer to form a suspension arrangement mode with five points (namely five pairs) in suspension quantity, so that the damage to the speed changer or suspension caused by the deformation of a frame is prevented.

The mode, that is, the vibration mode when the structure is free to vibrate, is also called a vibration mode. The natural frequency of each free vibration corresponds to one vibration mode, and the natural frequencies are compared with the degrees of freedom of the vehicle and the designed vehicle model. The actual comparison vehicle and the design vehicle model are complete continuous bodies, have infinite degrees of freedom, so the mode of the model has infinite orders, the model of the comparison vehicle is simplified, and the natural frequency corresponding to the degrees of freedom is solved by adopting an approximate method. If the finite element method is adopted to carry out the approximation method of simulation, enough structural vibration modes can be calculated more accurately, the 'orders' of the structural vibration modes are analyzed, the obtained characteristic values are arranged from small to large according to the orders, the embodiment of the invention comprises the steps of determining the mode parameters of the target vehicle by adopting the first-order torsional rigidity, and comparing, analyzing and processing the natural frequency and the vibration mode of the first order of the target vehicle.

In the invention, analysis, calculation and analysis simulation software (CAE) in engineering design is adopted to carry out modal simulation and modal analysis. Firstly, a three-dimensional CAE geometric model is established, a created parameter Solid format file of a target vehicle is output, parameters of suspension points selected by the target vehicle are collected, vehicle body axis position coordinates and torsion angle curves of the target vehicle are depicted, calculation files of the target vehicle parameters are submitted to a solver, modal analysis comparison, calculation processing and analysis of bending and torsion vibration modes of the target vehicle are carried out, the result of the target vehicle calculation analysis is transmitted to a front processing unit and a rear processing unit, and deformation conditions of the stress of the suspension points of the target vehicle under working conditions of the torsion bending vibration mode, the vertical bending vibration mode, the transverse bending vibration mode and the lateral bending vibration mode are evaluated to determine the type of suspension of each vehicle body of the target vehicle.

Before determining the type of suspension of each point of the design vehicle, setting the number of suspension points selected by the design vehicle, respectively collecting parameters of each suspension point, submitting calculation files for collecting the parameters of the design vehicle to a solver for calculation and analysis, and transmitting the calculation and analysis results of the design vehicle to a front-rear processing unit; and (3) carrying out analysis, comparison and calculation processing on the results of the calculation and the analysis of the standard car and the results of the calculation and the analysis of the standard car before, and carrying out visual output on the results of the analysis, comparison and calculation processing so as to determine the type of the suspension of each point of the design car. The CAE analysis of the frame mode vibration of the design vehicle comprises working conditions of torsional bending vibration mode, vertical bending vibration mode and lateral bending vibration mode, deformation quantity received by each suspension point is mainly analyzed, if the deformation quantity is mainly vertical, the suspension type which is usually selected is a compression type suspension type, the lateral deformation quantity received by the suspension point is larger, and the shearing type suspension type is selected.

When calculating the static stiffness of the target vehicle or the design vehicle, the static stiffness is the ratio of the force variation to the displacement variation in the force-displacement curve, and the actual deformation of the vehicle body suspension during static deformation is adopted to participate in calculation. If the design of the vehicle body suspension is designed, the problems of static deformation, rigid mode frequency and vibration mode distribution, vibration boundary position under the limit working condition and the like must be considered, when the vehicle body suspension matching calculation is carried out, the static deformation of the suspension is firstly considered, and the static deformation corresponding to the static deformation is the static actual deformation of the suspension under a certain static load. The static actual deformation of the suspension can cause the power assembly to generate a certain deformation in a certain direction, and the static deformation is controlled within a certain range when the power assembly is in suspension matching so as to prevent the engine power assembly from interfering with other parts of the vehicle body, and the static rigidity is adopted to participate in calculation. In the power assembly suspension matching calculation, the maximum displacement of some key position points of the engine power assembly under the limit working condition is also needed to be predicted sometimes, and the boundary position of vibration of the engine power assembly is determined so as to prevent the vehicle from interfering with other parts on the vehicle during the driving process. At this time, the vibration actual condition of the engine is that each suspension point bears the self gravity of the engine to generate a certain deformation, and the vibration actual condition is also a form of static deformation.

wherein beta is _{Label (C)} For vibration isolation transmissibility of the standard vehicle suspension, K _{Dynamic mark} For the dynamic rigidity of the suspension of the target vehicle, M _{Label (C)} To decompose the target car to the vertical direction of suspensionMass, F _{n is marked} To aim at the self-vibration frequency of the standard vehicle, F _{f mark} The mode frequency of the opposite vehicle frame.

When the self-vibration frequency of the target vehicle is measured and calculated, the vibration isolation transmissibility of the target vehicle suspension at each point is obtained by performing part test on the target vehicle and obtaining the dynamic stiffness K of the target vehicle suspension through the part test on the target vehicle _{Dynamic mark} And the modal frequency F of the standard vehicle frame _{f mark} Obtaining the self-vibration frequency F of the target vehicle through the self-vibration frequency calculation formula (2) and the vibration isolation transmission calculation formula (3) respectively _{n is marked} And vibration isolation transmissibility beta of the opposite vehicle suspension _{Label (C)} . In order to improve the measurement accuracy, in the embodiment of the invention, when the self-vibration frequency of the target vehicle is measured in a static environment, the self-vibration frequency of the target vehicle in the static rigidity environment can be correspondingly calculated by measuring the curves of the target vehicle body and the deformation; or when the total disturbance degree is unchanged and the ratio of the self-vibration frequency of the standard vehicle characteristic parameter in a static state to the self-vibration frequency of the standard vehicle in a moving state is unchanged, measuring an acceleration curve of the standard vehicle bogie or the rotating frame to obtain the self-vibration frequency of the standard vehicle in the moving state. Thus, the static rigidity K of the target vehicle can be improved by measurement and calculation _{Static state} And K _{Dynamic mark} Lower standard vehicle self-vibration frequency F _{n is marked} Is a precision of (a). Or in addition, the dynamic stiffness K of the target vehicle suspension can be obtained through the test of parts during the movement of the target vehicle _{Dynamic mark} And the modal frequency F of the standard vehicle frame _{f mark} Thus, the self-vibration frequency F of the target vehicle is calculated _{n is marked} And suspended vibration isolation transmissibility beta _{Label (C)} The self-vibration frequency F of the target vehicle can be conveniently and accurately obtained in a mode simulation mode _{n is marked} And suspended vibration isolation transmissibility beta _{Label (C)} 。

vibration isolation transmissibility based on suspension of each point of design vehicle and mode frequency according mode frequency of computer-aided engineering analysis combined with frame of design vehicle(4) Calculating the self-vibration frequency F of the design vehicle _{n is provided with} The method comprises the steps of carrying out a first treatment on the surface of the And

determining dynamic stiffness K of the suspension of the design vehicle according to the method (5) based on the self-vibration frequency of the design vehicle and the decomposition mass of the suspension of each point of the design vehicle _{Movable device} ；

Wherein beta is _{Is provided with} To design the vibration isolation transmissibility of the vehicle suspension, beta _{Is provided with} ≤β _{Label (C)} ，K _{Movable device} To design the dynamic stiffness of the vehicle suspension, M _{Is provided with} To design the decomposition mass of the vehicle to the vertical direction of the suspension of each point of the vehicle body, F _{n is provided with} To design the self-vibration frequency of the vehicle, F _{f is provided with} To design the modal frequency of the vehicle frame.

The present invention is not limited to the vibration isolation transmissibility β by suspending the target vehicle _{Label (C)} Direct replacement as a fixed, constant design requirement, i.e. beta _{Is provided with} ＝β _{Label (C)} . At the moment, when the self-vibration frequency of the design vehicle is measured and calculated, the vibration isolation transmissibility of the suspension of each point of the design vehicle is obtained by referring to the standard vehicle and performing part test mode simulation on the design vehicle, and the decomposition mass M of the design vehicle of the standard vehicle in the vertical direction of the suspension of each point of the vehicle body is obtained by the part mode simulation test of the standard vehicle _{Is provided with} And designing modal frequencies F of the vehicle frame _{f is provided with} And then the self-vibration frequency F of the design vehicle is calculated by referring to a self-vibration frequency calculation formula (2) and a vibration isolation transmission calculation formula (3) of the target vehicle _{n is provided with} And dynamic stiffness K of the design vehicle suspension _{Movable device} 。

In one embodiment of the invention, as an alternative implementation, the vibration isolation transmissibility beta is determined by suspending the vehicle in question _{Label (C)} Vibration isolation transmissibility beta for replacement of design vehicle _{Is provided with} In this case, the vibration isolation transmissibility β of the design vehicle can be set _{Label (C)} Controlled at the standardVibration isolation transmissibility beta of vehicle suspension _{Label (C)} Within (a) range, i.e. beta _{Is provided with} ≤β _{Label (C)} At the moment, when the self-vibration frequency of the design vehicle is measured and calculated, the vibration isolation transmissibility of the suspension of each point of the design vehicle is obtained by referring to the standard vehicle and performing part test mode simulation on the design vehicle, and the decomposition mass M of the design vehicle of the standard vehicle in the vertical direction of the suspension of each point of the vehicle body is obtained by the part mode simulation test of the standard vehicle _{Is provided with} And designing modal frequencies F of the vehicle frame _{f is provided with} And then the self-vibration frequency F of the design vehicle is calculated by referring to a self-vibration frequency calculation formula (4) and a vibration isolation transmission calculation formula (5) of the design vehicle _{n is provided with} And dynamic stiffness K of the design vehicle suspension _{Movable device} . The self-oscillation frequency F of the design vehicle obtained by the calculation method _{n is provided with} F when the vehicle is designed to run dynamically _{f is provided with} The mode frequency of the high frequency is obtained by adopting a self-vibration frequency calculation formula (4) of the design vehicle, and the self-vibration frequency F of the design vehicle in the dynamic stable driving process is obtained _{n is provided with} Thereby ensuring the vibration isolation transmissibility beta of the design vehicle _{Label (C)} Vibration isolation transmissibility beta of alignment mark vehicle suspension _{Label (C)} In small cases, the vehicle has stronger stability and NVH performance during dynamic driving.

It should be noted that, when the rubber member is adopted for the vibration isolation design at each suspension point of the design vehicle, the shape of the designed rubber member is not limited, the rigidity (static rigidity or dynamic rigidity) in each direction can be freely selected within a certain range, and the design vehicle has certain space spring characteristics and can bear different loads (such as empty load and full load) in a plurality of directions; vibration and energy impact transmitted by the chassis and the bottom of the vehicle body can be well absorbed by utilizing damping effect generated by internal friction; the adhesive is easy to firmly adhere to metal or other solid material parts, so that the difficulty of fixing and the complexity of a supporting structure are greatly simplified, and the overall quality of a designed vehicle suspension structure is reduced; the structure process flow is convenient, the manufacturing cost of the suspension structure of the design vehicle is reduced, the suspension structure is suitable for batch production in factories, and the suspension structure is simple and convenient in use and maintenance at the later stage.

The present invention also provides a target-based vehicle body suspension design device, as shown in fig. 2, the target-based vehicle body suspension design device 200 includes:

a suspension number setting unit 210, configured to obtain spatial arrangements of the target vehicle and the design vehicle, and determine a vehicle body suspension number of the design vehicle based on spatial arrangement parameters of the target vehicle;

a suspension type determination unit 220 for determining the type of suspension of each point of the design vehicle based on the analysis result of the computer-aided engineering analysis of the modal vibration of the frame of the design vehicle;

the static stiffness design unit 230 is configured to determine an actual deformation of each point of the vehicle body suspension based on a static load stress of each point of the vehicle body suspension and a spatial arrangement of the vehicle frame and the vehicle body of the design vehicle, and determine a static stiffness of the vehicle body suspension of the design vehicle based on the actual deformation;

the dynamic stiffness design unit 240 is configured to determine the dynamic stiffness of the design vehicle body suspension based on the vibration isolation transmissibility of the target vehicle suspension at each point, the self-vibration frequency obtained by computer-aided engineering analysis of the design vehicle suspension at each point, and the decomposition mass of the design vehicle body suspension at each point.

It should be noted that, in the step flow of the method for designing a target-based vehicle body suspension, the method for designing a target-based vehicle body suspension 200 of the present invention includes a suspension number setting unit 210, a suspension type determining unit 220, a static stiffness designing unit 230, and a dynamic stiffness designing unit 240 for executing each step of the method for designing a target-based vehicle body suspension, and specific operation and execution modes are described in detail in the method for designing a target-based vehicle body suspension, and are not repeated herein. The invention fully considers the proper distribution relation of the structural rigidity of the design vehicle (through the static rigidity and the dynamic rigidity of the vehicle body and the modal simulation of the vehicle body) between the vehicle frame and the vehicle body by presetting and judging the number, the position and the type of the suspension points of the design vehicle body in the structural design, selecting the form of the suspension point structure (the form of a rubber piece matched with the suspension point structure) of the suspension point of the design vehicle body and determining the elasticity and the damping characteristic of the rubber pad, thereby ensuring the stability and the strong NVH performance of the transmission of the rigidity of the design vehicle and improving the accuracy of the assembly connection position of the frame and the vehicle body of the design vehicle; the designed vibration isolation effect is improved, and meanwhile, the stability of the designed vehicle body is higher than that of a standard vehicle in running. The frame of the design vehicle is executed in a mode simulation mode, the matching degree of the vibration characteristic and the selected vibration point is high, the stress and vibration isolation conditions of a rubber part or a rubber pad based on the fixation of the target vehicle body suspension are better, the durability and the maintainability of the rubber part or the rubber pad are stronger, and the stress condition of the frame of the design vehicle is more uniform and stable.

The present invention also provides a target-based vehicle body suspension design system, as shown in fig. 3, the target-based vehicle body suspension design system includes the target-based vehicle body suspension design device 200, and the target-based vehicle body suspension design system 300 includes:

the acquisition unit 310 is configured to acquire and report data information of at least one of the suspension number setting unit, the suspension type determining unit, the static stiffness design unit, and the dynamic stiffness design unit;

the processing unit 320 is configured to obtain the data information reported by the acquisition unit, perform analysis and processing of data based on the reported data information, generate control instruction information based on a processing result, and output the control instruction information;

and the control unit 330 is configured to obtain control instruction information output by the processing unit, and control at least one of the suspension number setting unit, the suspension type determining unit, the static stiffness design unit, and the dynamic stiffness design unit, so that the controlled unit completes a corresponding design in suspension design.

It should be noted that, the above-mentioned target-vehicle-suspension-based design system 300 includes an acquisition unit 310, a processing unit 320, and a control unit 330 that are respectively in communication connection with the vehicle suspension design device 200, where the acquisition unit 310 is configured to acquire data information of the target vehicle and/or the design vehicle suspension and report the acquired data information to the processing unit 320, and the processing unit invokes at least one corresponding calculation formula in the corresponding formulas (1) to (5) to perform corresponding analysis and calculation processing under a proper condition, and generates control instruction information based on a result of the analysis and processing, and then outputs the control instruction information to the control unit 330 to perform instruction control and operation control on at least one of the target vehicle and/or the design vehicle suspension number setting unit, the suspension type determining unit, the static stiffness design unit, and the dynamic stiffness design unit, so that the controlled units complete the design operation of the corresponding steps in the design vehicle suspension design method. In the target-based vehicle body suspension design system of the present invention, specific operation and execution process refer to the description of the target-based vehicle body suspension design method, and the description thereof is omitted herein.

The present invention also provides an electronic device, as shown in fig. 4, the electronic device 400 includes:

memory 410 for storing non-transitory computer-readable instructions 430; and

a processor 420 configured to execute the computer readable instructions 430 such that the computer readable instructions 430 when executed by the processor 420 implement the benchmarking-based body suspension design method described in any of the above embodiments.

It should be noted that any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and that preferred embodiments of the present invention include additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium may even be paper or other suitable medium upon which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

Those of ordinary skill in the art will appreciate that all or part of the steps included in the method implementing the above embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and the program includes one or a combination of the steps of the method embodiments when executed.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in part in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

The present invention is not limited to the above embodiments, but is capable of modification and variation in all aspects, including all modifications and variations, without departing from the spirit and scope of the present invention.

Claims

1. A benchmarking-based vehicle body suspension design method, the method comprising:

2. The method of claim 1, wherein determining the number of body suspensions of the design vehicle based on the spatial arrangement parameters of the target vehicle comprises:

3. The method of claim 1, wherein the computer aided engineering analysis of the designed vehicle frame modal vibrations comprises:

4. The method of claim 1, wherein determining an actual deformation of each point of the vehicle body suspension based on the static load stress of each point of the vehicle and the spatial arrangement of the vehicle frame and the vehicle body, and determining the static stiffness of the vehicle body suspension based on the actual deformation comprises:

5. The method of claim 1, wherein determining the dynamic stiffness of the design vehicle body mount based on the vibration isolation transmissibility for the target vehicle body mount and the self-vibration frequency obtained from the computer-aided engineering analysis for the design vehicle body mount and the decomposition mass into the design vehicle body mount comprises:

6. The method of claim 5, wherein determining the dynamic stiffness of the design vehicle body mount based on the vibration isolation transmissibility for the target vehicle point mount and the self-vibration frequency obtained from the computer-aided engineering analysis for the design vehicle point mount and the decomposition mass into the design vehicle point body mount further comprises:

7. A benchmarking-based vehicle body suspension design apparatus, said apparatus comprising:

8. A benchmarking-based body suspension design system including the benchmarking-based body suspension design apparatus of claim 8, said system comprising:

9. An electronic device, comprising:

a memory for storing non-transitory computer readable instructions; and

a processor for executing the computer readable instructions such that the computer readable instructions when executed by the processor implement the method of any one of claims 1 to 6.

10. A computer readable storage medium comprising computer instructions which, when run on a device, cause the device to perform the method of any one of claims 1 to 6.