CN106599358A - Method for recognizing car suspension vibration transmission path and contribution amount - Google Patents
Method for recognizing car suspension vibration transmission path and contribution amount Download PDFInfo
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- CN106599358A CN106599358A CN201610981576.XA CN201610981576A CN106599358A CN 106599358 A CN106599358 A CN 106599358A CN 201610981576 A CN201610981576 A CN 201610981576A CN 106599358 A CN106599358 A CN 106599358A
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention discloses a method for recognizing a car suspension vibration transmission path and contribution amount. The method comprises the steps of building a car suspension multi-body dynamics analysis model by using simulation software; setting an input output channel in a virtual test bench and performing vibration simulation; acquiring system speed admittance; calculating response of force and speed input into a car body; calculating to obtain a power flow input into the car body from each path; and performing list ranking on total power flow values of all paths that are obtained through calculation and are within a frequency research range, so as to analyze impact of each path on the vibration response of the suspension system. According to the method, the power flow is used as a uniform value to describe the vibration transmission process of the suspension system, the power flow represents vibration response in a form of scalar, and different transmission paths are not limited by directions and units any longer; and an absolute value of vibration transmission is obtained by using the power flow, and the power flow of a connection interface focused by the system is lowered so as to achieve shock absorption.
Description
Technical field
The present invention relates to the solution of automobile vibration and noise problem, is especially to vibrate automobile suspension system
Transmit the method for being identified, sorting and find out main bang path with contribution amount in path.
Background technology
As the riding comfort of automobile obtains the attention of people so that with noise, vibration and sound vibration roughness as representative
NVH performances become one of important indicator of automobile competitiveness.Impact of the anti-vibration performance of suspension to car load NVH performances is very big.
Various vibrational excitations from road surface support (Top by suspension bushes (rubber bushing or hydraulic bushing), vibroshock upper end
The Top Mount of Mount, rubber or hydraulic pressure pattern) etc. rubber absorber (or) vehicle body of incoming automobile, how to design outstanding
Frame bushing, the rigidity of Top Mount and drag characteristic, are one of important process of suspension design.
When suspension system is by from road excitation, vibration many bushings of Jing are delivered to body structure along different directions,
Form multipath transmission.Each bang path is different for the contribution of the vibratory response of body structure.By different transmission roads
The contribution amount in footpath, it can be determined that go out the contribution that each bang path is responded to body vibrations.In order to recognize on vibratory response affect compared with
Big bang path, it is necessary to which many bang path vibrational systems are analyzed.Analysis excitation source structure, bang path and acceptance
Vibrational energy may be transmitted in structure and produce the latency for affecting, necessary basis is provided for vibrational energy transmission control.
For linear time invariant system, the structural vibration response of certain point is the coefficient result of multiple driving sources,
And equal to the superposition of structural response during single driving source independent role.In vehicular vibration system, conventional transmission path analysis side
Method generally using generalized force or generalized acceleration as variable, but due to direction and the difference of unit, the force-responsive in different paths and
Acceleration responsive directly can not be superimposed.In the essence of system vibration, vibrational system is substantially vibrational energy to shake
Dynamic form is transmitted between different structures or medium, therefore can be more as the method for research variable using vibrational energy
Reflect well the transmission essence of the vibration of system, and as energy is scalar, solve each bang path direction different from unit
Caused confinement problems.
The content of the invention
The technical problem to be solved is：A kind of Vehicle Suspension Vibration bang path and contribution amount identification side are provided
Method, the method can analyze the vibration feelings that automotive suspension is transferred to vehicle body under different road excitation operating modes by each path
Condition, identifies main vibration transfer path, provides to automotive suspension vibration and noise reducing and instructs.
To solve above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of Vehicle Suspension Vibration bang path and contribution amount recognition methodss, comprise the following steps：
Step 1, sets up automotive suspension Transfer path analysis model, sets up vapour using multi-body Dynamic Analysis software ADAMS
The multi-body Dynamics Model of suspension system, the main driving source in Definition Model are the six direction for being applied to wheel disk
Exciting force, the response impact point of suspension system include at vehicle body and Suspension control arm bush junction point and vehicle body and vibroshock upper end
Support at junction point, bang path specifically includes the six direction by core wheel along all bushings of irs control arm and responds mesh to correspondence
Punctuate, by core wheel along suspension shock-absorber upper end support six direction to correspondence response impact point；
Step 2, arranges I/O channel, and the Input Channel in ADAMS/Vibration modules arrange excitation
The direction of power and size, are selected specifically to unit force frequency sweep, direction be vertical road surface upwards；Arrange in Output Channel
Output is the generalized force and generalized velocity of the six direction at each impact point, in Perform Vibration Analysis
Input and output channel that selection sets, start simulation analysis after setting analysis frequency and step-length；
Step 3, obtains system speed admittance, comes for having p bushing and the suspension system of q vibroshock upper end support
Say, its vibration transfer path has N=3 × (p+q) bar bang path, each side at impact point is obtained in PostProcessor
Speed responsive V upwardsi, it is possible to obtain the velocity admittance by core wheel to each impact point under every pathsIn the same manner, repeat the step and can obtain the transfer admittance between system any two pointsShould
Result obtained by step also can be obtained by testing；
Step 4, calculates the response of input to vehicle body power and speed, according to formula
Vc,1=Hc,11Fc,1 (3)
[Fs,2Fb,2Vs,2Vb,2]T=[- Fb,1-Fc,1Vb,1Vc,1]T (4)
Can be calculated F is encouraged in given core wheels,1、Vs,1The respectively response of suspension frame structure input power and speed, Fs,1
The lower response F being input into vehicle body end power and speedc,1、Vc,1,
In formula：
Fs,2、Vs,2The respectively response of suspension frame structure outfan power and speed,
Fb,1、Vb,1The respectively response of bushing input power and speed,
Fb,2、Vb,2The respectively response of bushing outfan power and speed,
Hc,11For the speed point admittance of vehicle body,
Hm,ij(m=s, b；I, j=1,2) for suspension frame structure and bushing input and outfan between transfer admittance；
Step 5, according to formulaIt is calculated the power being input into by each path to vehicle body
Stream, in specified research frequency range, according to formulaIt is calculated whole research frequency model
The total power flow of vehicle body is transferred in enclosing by each path；For the suspension system for having N bar bang paths, then basisIt is calculated the total power flow sum for being transferred to vehicle body by all paths in research frequency range；
Step 6, carries out list ordering to general power flow valuve of the calculated each path in research frequency range, and will
Which receives the contribution amount of total power flow as vehicle body, according to the difference of contribution amount size, you can analyze each paths for outstanding
The influence degree of frame system vibration response.
Further, the parameter of the model set up in the step 1 and moulding are from actual vehicle suspension, and examine
The elasticity of vehicle body is considered, has been Coupled Rigid-flexible modeling process.
Further, the acquisition of the admittance of the step 3 is carried out by analytic method, laboratory method or simulation analysis method, described
Analytic method needs by setting up the many-body dynamics equation group of system to realize；The experiment rule needs to survey using operating mode response
Power and the speed responsive at impact point at measurement core wheel are put in trial assembly.
Further, the step of response of input to vehicle body power and speed is calculated described in step 4, which has returned vibration
Essence, from the angle of energy, characterizes the situation of vibration transmission by with the size of transmission power；Due to each transmission
The effect of intercoupling in path, its transfer admittance can just can be born, therefore the transmission power between suspension system each several part is also for can
Can just bear.
Further, in the step 5 each bang path contribution amount be according to be transferred to vehicle body total power flow size and
Numerical value being judged, if Jing paths are transferred to the general power flow valuve of vehicle body just, to illustrate the vibrational energy from bushing just
To inflow vehicle body；Otherwise it is then from vehicle body to bushing reverse flow.
Further, the total power flow that vehicle body receives is the algebraical sum of the power flow of a certain instantaneous each paths transmission.
Further, vibration transmission contribution amount when list ordering is carried out in the step 6 using different paths passes through one
Individual unified standard ignores that numerical value is less or part bang path for negative differentiating, takes the larger conduct of its numerical value main
Bang path, provides guidance for suspension system noise and vibration control.
The present invention compared with prior art, with advantages below：
1) using power flow as unified value come describe suspension system vibration transmittance process, analysing energy bang path,
It is workable, it is fast and simple；
2) power contain power and speed and between them phase contrast information, characterized in the form of scalar vibration ring
Should, the restriction of direction and unit is no longer influenced by between different bang paths；
3) absolute magnitude of vibration transmission is given by power flow, the work(of reduction system linkage interface of interest can be passed through
Rate stream is reaching the purpose of vibration damping.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Fig. 2 is suspension system multi-body Dynamics Model (ADAMS/View modelings) in the present invention.
Fig. 3 is medium velocity mechanical admittance curves figure of the present invention.
Fig. 4 is total power flow curve chart in the present invention.
Fig. 5 is the response schematic diagram of the input between suspension frame structure, bushing and body structure and outfan and speed.
Specific embodiment
The present invention is described in further detail below in conjunction with example of the accompanying drawing with a certain McPherson suspension.
As shown in figure 1, a kind of Vehicle Suspension Vibration bang path and contribution amount recognition methodss, the method is by the essence vibrated
Set out, based on Vibratory power flow analysis, the vibration transmissibility of automobile suspension system with the angle analysis of energy, including it is following
Step：
Step 1, sets up automotive suspension Transfer path analysis model, sets up vapour using multi-body Dynamic Analysis software ADAMS
The multi-body Dynamics Model (see Fig. 2) of car McPherson suspension system, lower control arm point are connected by bushing B1, B2 with vehicle body, are subtracted
The device that shakes is connected with vehicle body by Top Mount (being represented with TM below) with bearing spring upper extreme point.Control arm outer end passes through ball
Hinge is connected with knuckle, and knuckle is connected with ball pivot with track rod.Vibroshock hypomere and knuckle pass through a bushing or
Person rotates and is hinged, it is assumed here that for rigid rotating hinge.In the suspension system, in addition to rubber bushing, TM and vehicle body, its
Its part may be regarded as rigid body.Main driving source in Definition Model is the exciting force of the six direction for being applied to wheel disk.System
The response impact point of system has multiple, specifically includes at vehicle body and Suspension control arm bush junction point and vehicle body and vibroshock upper end
At support junction point.Bang path is specifically included：Mesh is responded to correspondence by six direction of the core wheel along all bushings of irs control arm
Punctuate, by core wheel along suspension shock-absorber upper end support six direction to correspondence response impact point.
Step 2, arranges I/O channel, and the Input Channel in ADAMS/Vibration modules arrange excitation
The direction of power and size, are selected specifically to unit force frequency sweep, direction be vertical road surface upwards；Arrange in Output Channel
Output is the generalized force and generalized velocity of the six direction at each impact point；In Perform Vibration Analysis
Input and output channel that selection sets, start simulation analysis after setting analysis frequency and step-length.
Step 3, obtains system speed admittance (see Fig. 3), for the suspension for having 2 bushings and 1 vibroshock upper end to support
For system, its vibration transfer path has N=3 × (2+1)=18 bang path, obtains target in PostProcessor
The speed responsive V in all directions at pointi, it is possible to obtain the velocity admittance by core wheel to each impact point under every pathsIn the same manner, repeat the step and can obtain the transfer admittance between system any two points
Step 4, calculates the response (see Fig. 5) of input to vehicle body power and speed, according to formula
Vc,1=Hc,11Fc,1 (3)
[Fs,2Fb,2Vs,2Vb,2]T=[- Fb,1-Fc,1Vb,1Vc,1]T (4)
Can be calculated F is encouraged in given core wheels,1The lower response F being input into vehicle body end power and speedc,1、Vc,1。
In formula：
Fs,1、Vs,1The respectively response of suspension frame structure input power and speed,
Fs,2、Vs,2The respectively response of suspension frame structure outfan power and speed,
Fb,1、Vb,1The respectively response of bushing input power and speed,
Fb,2、Vb,2The respectively response of bushing outfan power and speed,
Hc,11For the speed point admittance of vehicle body,
Hm,ij(m=s, b；I, j=1, are 2) transfer admittance between suspension frame structure and bushing input and outfan, return
The essence of vibration, from the angle of energy, characterizes the situation that vibration is transmitted by using the size of transmission power；Due to
The effect of intercoupling of each bang path, its transfer admittance can just can be born, therefore the transmission work(between suspension system each several part
Rate is also can just to bear.
Step 5, according to formulaIt is calculated the power being input into by each path to vehicle body
Stream, in specified research frequency range, can be according to formulaIt is calculated whole research frequency
The total power flow of vehicle body is transferred in the range of rate by each path；For the McPherson suspension system for having 18 bang paths, can
With basisIt is calculated the total power flow for being transferred to vehicle body by all paths in research frequency range
Sum (see Fig. 4), each bang path contribution amount be according to the size and numerical value of vehicle body total power flow is transferred to being judged,
If the general power flow valuve that Jing paths are transferred to vehicle body flows into vehicle body from bushing is positive just, to illustrate vibrational energy；Otherwise then
It is from vehicle body to bushing reverse flow.
Step 6, carries out list ordering (such as table to general power flow valuve of the calculated each path in research frequency range
Shown in 1), and receive the contribution amount of total power flow as vehicle body.According to the difference of contribution amount size, Ge Tiao roads can be analyzed
Footpath is for the influence degree of suspension system vibratory response.Vibration transmission contribution amount when carrying out list ordering using different paths is led to
Cross a unified standard to differentiate, ignore that numerical value is less or part bang path for negative, take the larger conduct of its numerical value
Main bang path, provides guidance for suspension system noise and vibration control.
Table 1 is delivered to the power flow (W) of body structure from different bushings and direction
The above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to the present invention
Embodiment restriction.For those of ordinary skill in the field, can also make on the basis of the above description
The change or variation of other multi-forms.There is no need to be exhaustive to all of embodiment.It is all the present invention
Any modification, equivalent and improvement made within spirit and principle etc., should be included in the protection of the claims in the present invention
Within the scope of.
Claims (7)
1. a kind of Vehicle Suspension Vibration bang path and contribution amount recognition methodss, it is characterised in that：Comprise the following steps：
Step 1, sets up automotive suspension Transfer path analysis model, sets up automobile using multi-body Dynamic Analysis software ADAMS and hangs
The multi-body Dynamics Model of frame system, the main driving source in Definition Model are the excitation of the six direction for being applied to wheel disk
Power, the response impact point of suspension system include at vehicle body and Suspension control arm bush junction point and vehicle body and the support of vibroshock upper end
At junction point, bang path specifically includes the six direction by core wheel along all bushings of irs control arm and responds target to correspondence
Point, by core wheel along suspension shock-absorber upper end support six direction to correspondence response impact point；
Step 2, arranges I/O channel, and the Input Channel in ADAMS/Vibration modules arrange exciting force
Direction and size, are selected specifically to unit force frequency sweep, direction be vertical road surface upwards；Output is set in Output Channel
The generalized force and generalized velocity for the six direction at each impact point is measured, is chosen in Perform Vibration Analysis
The input for setting and output channel, start simulation analysis after setting analysis frequency and step-length；
Step 3, obtains system speed admittance, for the suspension system for having p bushing and q vibroshock upper end support, its
Vibration transfer path has N=3 × (p+q) bar bang path, in all directions that PostProcessor obtains at impact point
Speed responsive Vi, it is possible to obtain the velocity admittance by core wheel to each impact point under every paths
In the same manner, repeat the step and can obtain the transfer admittance between system any two pointsResult obtained by the step can also be led to
Cross experiment to obtain；
Step 4, calculates the response of input to vehicle body power and speed, according to formula
Vc,1=Hc,11Fc,1 (3)
[Fs,2 Fb,2 Vs,2 Vb,2]T=[- Fb,1 -Fc,1 Vb,1 Vc,1]T (4)
Can be calculated F is encouraged in given core wheels,1、Vs,1The respectively response of suspension frame structure input power and speed, Fs,1Under it is defeated
Enter the response F to vehicle body end power and speedc,1、Vc,1,
In formula：
Fs,2、Vs,2The respectively response of suspension frame structure outfan power and speed,
Fb,1、Vb,1The respectively response of bushing input power and speed,
Fb,2、Vb,2The respectively response of bushing outfan power and speed,
Hc,11For the speed point admittance of vehicle body,
Hm,ij(m=s, b；I, j=1,2) for suspension frame structure and bushing input and outfan between transfer admittance；
Step 5, according to formulaThe power flow being input into by each path to vehicle body is calculated,
For in specified research frequency range, according to formula PC, i=∫ΔωPC, i(ω) d ω are calculated whole research frequency range
The interior total power flow that vehicle body is transferred to by each path；For the suspension system for having N bar bang paths, then basisIt is calculated the total power flow sum for being transferred to vehicle body by all paths in research frequency range；
Step 6, carries out list ordering to general power flow valuve of the calculated each path in research frequency range, and is made
Receive the contribution amount of total power flow for vehicle body, according to the difference of contribution amount size, you can each paths are analyzed for suspension system
The influence degree of system vibratory response.
2. Vehicle Suspension Vibration bang path according to claim 1 and contribution amount recognition methodss, it is characterised in that：It is described
The parameter of the model set up in step 1 and moulding are from actual vehicle suspension, and consider the elasticity of vehicle body, are hard and soft
Coupling method process.
3. Vehicle Suspension Vibration bang path according to claim 1 and contribution amount recognition methodss, it is characterised in that：It is described
The acquisition of the admittance of step 3 is carried out by analytic method, laboratory method or simulation analysis method, and the analytic method is needed by setting up system
Many-body dynamics equation group realizing；The experiment rule need using the power at operating mode response test measurement device core wheel and
Speed responsive at impact point.
4. Vehicle Suspension Vibration bang path according to claim 1 and contribution amount recognition methodss, it is characterised in that：Step
The step of response of input to vehicle body power and speed is calculated described in 4, which has returned the essence of vibration, goes out from the angle of energy
Send out, the situation of vibration transmission is characterized by with the size of transmission power；Due to the effect of intercoupling of each bang path,
Its transfer admittance can just can be born, therefore the transmission power between suspension system each several part is also can just to bear.
5. Vehicle Suspension Vibration bang path according to claim 1 and contribution amount recognition methodss, it is characterised in that：It is described
In step 5, each bang path contribution amount is being judged, if Jing according to the size and numerical value of vehicle body total power flow is transferred to
Certain paths is transferred to the general power flow valuve of vehicle body and flows into vehicle body from bushing is positive just, to illustrate vibrational energy；Otherwise be then from
Vehicle body is to bushing reverse flow.
6. Vehicle Suspension Vibration bang path according to claim 1 and contribution amount recognition methodss, it is characterised in that：Vehicle body
The total power flow of acceptance is the algebraical sum of the power flow of a certain instantaneous each paths transmission.
7. Vehicle Suspension Vibration bang path according to claim 1 and contribution amount recognition methodss, it is characterised in that：It is described
Vibration when list ordering is carried out in step 6 using different paths transmits contribution amount by a unified standard to differentiate, suddenly
Slightly numerical value is less or part bang path for negative, takes the main bang path of the larger conduct of its numerical value, is that suspension system is made an uproar
Sound and vibration control provides guidance.
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| CN107748072A (en) * | 2017-05-25 | 2018-03-02 | 西南交通大学 | Shock absorber of automobile suspension impact noise recognition methods |
| CN107818216A (en) * | 2017-10-30 | 2018-03-20 | 广西科技大学 | Vehicle cab body frame structure for automotive optimization method |
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| CN113183711A (en) * | 2021-06-04 | 2021-07-30 | 合肥工业大学 | Vibration and impact fusion control method |
| CN116502343A (en) * | 2023-06-29 | 2023-07-28 | 江铃汽车股份有限公司 | Automobile suspension optimal design method, system, storage medium and equipment |
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| CN106996828A (en) * | 2017-05-04 | 2017-08-01 | 安徽江淮汽车集团股份有限公司 | The method for predicting the in-car noise contribution amount size of accelerating mode |
| CN107229785A (en) * | 2017-05-24 | 2017-10-03 | 中国汽车工程研究院股份有限公司 | A kind of commercial car steeraxle, vehicle frame and connector dynamics simulation device |
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| CN107818216A (en) * | 2017-10-30 | 2018-03-20 | 广西科技大学 | Vehicle cab body frame structure for automotive optimization method |
| CN110749406A (en) * | 2018-07-24 | 2020-02-04 | 上汽通用五菱汽车股份有限公司 | Analysis method for vibration transmission path of vehicle body |
| CN110175392A (en) * | 2019-05-22 | 2019-08-27 | 中国民航大学 | Aero-engine vibration transfer path analysis method based on OTPA method and modeling in kind |
| CN110175392B (en) * | 2019-05-22 | 2022-12-13 | 中国民航大学 | Aero-engine vibration transmission path analysis method based on OTPA method and physical modeling |
| CN110472344A (en) * | 2019-08-19 | 2019-11-19 | 西北工业大学 | A kind of sinking support gear train layering Transfer Path Analysis Method of Automobile |
| CN113183711A (en) * | 2021-06-04 | 2021-07-30 | 合肥工业大学 | Vibration and impact fusion control method |
| CN113183711B (en) * | 2021-06-04 | 2022-03-15 | 合肥工业大学 | Vibration and impact fusion control method |
| CN116502343A (en) * | 2023-06-29 | 2023-07-28 | 江铃汽车股份有限公司 | Automobile suspension optimal design method, system, storage medium and equipment |
| CN116502343B (en) * | 2023-06-29 | 2023-10-31 | 江铃汽车股份有限公司 | Automobile suspension optimal design method, system, storage medium and equipment |
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