机械毕业设计英文外文翻译下控制臂橡胶衬套刚度对双横臂独立悬架影响.docx

机械毕业设计英文外文翻译下控制臂橡胶衬套刚度对双横臂独立悬架影响.docx

《机械毕业设计英文外文翻译下控制臂橡胶衬套刚度对双横臂独立悬架影响.docx》由会员分享，可在线阅读，更多相关《机械毕业设计英文外文翻译下控制臂橡胶衬套刚度对双横臂独立悬架影响.docx（17页珍藏版）》请在冰豆网上搜索。

机械毕业设计英文外文翻译下控制臂橡胶衬套刚度对双横臂独立悬架影响

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InfluenceofFrontDoublewishboneIndependentSuspensionPerformanceonFrontRubberBushingStiffnessofLowerControlArm

LiuXintian，HungHu,WangJichang，ZhaoLihui，GaoHui，WangYansong

Abstract--FrontdoublewishboneIndependentsuspensionisbuiltaccordingtohardpointparametersofacar.Aftertherubberbushingstiffnessoflowercontrolarmischanged．ThesuspensionperformanceisanalyzedanddiscussedwithmultibodydynamicandSuspensionKinematicstheory.Theconclusioncanbedrawnasfollows：

whenwheelsarehoping,Allthestiffnessoflowercontrolarmhavenoeffectoncamberangle，casterangleandkingpin_incl_angle，andtorsionstiffnessofrubberbushinghasheavyeffectontoeangle，butaxial，radialstiffnesshavenoeffect,Whilesteering，allthestiffnessoflowercontrolarmrubberbushinghavenoeffectoncamberangleandtoeangle，torsionstiffnesshasaffectsoncamberangle,axialstiffnesshasalittleandradialstiffnesshasheavy,axialandtorsionstiffnesshavenoneonkingpin_incl_angle，butradialstiffnesshasheavy．Duringtheanalyzeoftractionforceandbrakeforce,torsionstiffnessoflowercontrolarmrubberbushinghasnoeffectoncamberangle,kingpin_incl_angleandtoeangle,axialstiffnesshasalittle,andradialstiffnessheavy,AccordingtothecurveofcasterangleVSbrakeforce,radialandaxialstiffnessofrubberbushinghavealittleaffectsoncasterangle,buttorsionstiffnessnone

Keywords-FrontDoubleWishboneIndependentSuspension,rubberbushing,stiffness

I.INTRODUCTION

Doublewishboneindependentsuspensioniswidelyusedonautomobilenow.Twowishboneshaveequallengthornot.EquallengthofdoublewishboneindependentsuspensionisNotusuallyusednow,Unequallengthofdoublewishboneindependentsuspensioncankeepgoodroadabilityandreducetheinterferencebetweensuspensionandsteerbar,withreasonablestructuralparametersandProperarrangementstomaketheparameterofwheelspinandwheellocationfloatinginPermissiblerange.therefore,itiswidelyusedinfrontsuspensionofcarandsmalltruck.Frontdoublewishboneindependentsuspensionisregardasresearchobjectusingmulti—bodydynamicsandSuspensionKinematicstheorytoanalyzeanddiscustheinfluenceofsuspensionperformancebyaxial,torsion,radicalstiffnessofrubberbushing.

IITHEMODELOFTHEMULTI—BODYDYNAMICS

Multibodydynamicstheoryisthesubjectthatstudyonthemovementruleoftheobjectinsystem.Itiscomposedofmulti_rigid_bodydynamicsandmulti_fexible_bodydynamics:

Whereq,,aresystem’ssystemposition,speed,accelerationvector,islangrangemultiplier,tRdenotethetime,Mdenoteinertiamatrixofmechanicalsystem,deonteconstraintjaclbianmatrix,Qdenoteoutsideforcevector,denotelocationconstraintequation.

;

;

Wherev（q,t）isspeedrightside,isacclerationrightside.

Initialcondition

q（0）=

（0）=

Puttingtheinitialconditioninto

（2）and（3）,therigidmovementcanbecalculatedbyabovefunctions

IIIFRONTDOUBLEWISHBONEINDEPENDENTSUSPENSIONMODEL

Figure1,frontdoublewishboneindependentsuspensionmodel

Accordingtothesuspensionkeyhardpointvalueofacertaincar,frontdoublewishboneindependentsuspensionKinematicsmodelisbuiltasshownFigure1.Thecharacteristicsoflocationparametersareanalyzedinsomeoperatingconditions.Duringtheanalysis,axial,torsion,radicalstiffnessofrubberbushingisrespectivelyincreasingto5timesoforiginal,andthencomparisonandanalysiswiththeoriginal.

IVTHEINFLUENCEOFWHEELLOCATIONPARAMETERSBYLOWERCONTROLARMFRONTBUSHINGSTIFFNESS

Whenfrontrubberbushingstiffnessoflowercontrolarmischanged，theinfluenceofwheellocationparametersarediscussedseparatelyundertheconditionsofwheelhop,steering,tractionforceandbrakingforce.

A.Wheelhop

CamberangleVSwheeltravel

CasterangleVSwheeltravel

Kingpin_incl_angleVSWheeltravel

ToeangleVSWheeltravel

Figure2.Thecurveofrubberbushingstiffnessoflowercontrolarm,wheellocationparametersandwheeltravel.

Infig2,thefourcurvesareundertheconditionsofunchanginglowercontrolarmrubberbushingstiffnessandradial，axial，torsionstiffnessincreasing5times（thechangesoflowercontrolarmrubberbushingstiffnessarealsolikethisinfig.3,4and5）.Infig.2whilewheelsishoping,accordingtothecurveofcamberanglevswheeltravel,casteranglevswheeltravelandkingpin_incl_anglevswheeltravel,theconclusionisdrawnthatradial,axialandtorsionstiffnessofrubberbushinghasnothetoeangle,Radicalstiffnessofrubberbushinghasheavyonthetoeangle,butaxialandtorisionstiffnesshavealittlefromthecurveoftoeanglevswheeltravel.

BSteeringanalyze

CamberangleVSSteeringangle

CasterangleVSStee