王爱华-白车身扭转刚度对整车操控性能的影响说课材料.ppt

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1、白车身扭转和横向刚度对整车操控性能的影响姓名：王爱华学号：31503082参考文献HariKrishnanM,NSreeraj,CBhaskar,GNagarajuandRMugundaram，MarutiSuzukiIndia,Ltd.“EstablishingCorrelationbetweenTorsionalandLateralStiffnessParametersofBIWandVehicleHandlingPerformance,”SAETechnicalPaper2011-01-0089,2011,doi:10.4271/2011-01-0089扭转刚度扭转工况下车身抵抗变形的

2、能力CorneringPassingsteps扭转刚度的意义静态或动态扭转工况下车上部件不受影响，比如车门可以整车开关，密封依然良好等。整车的操控性，NVH，耐撞性，耐久性等。Asaresultofmanyearlierstudies,itisknownthatincreaseinstiffnessofthevehiclebodyimprovesthehandlingofthevehicle.But,therehasbeennoattemptmadetopredicthowmuchimprovementinhandlingoccursforaparticularincreaseinbodys

3、tiffness.Processflow仿真&实验主观评价&客观测试大胆的假设，小心的求证。NEWBILITYCAE(TorsionalStiffness)Load&BoundaryStrainEnergyContourCAE(TorsionalStiffness)IterationsdoneinCAECAE(LateralStiffness)Load&BoundaryStrainEnergyContourCAE(LateralStiffness)FABRICATIONSFABRICATIONS控制变量法Effectofincreaseintorsionalstiffnessonlatera

4、lstiffnessSininputtestAnopen-looptestmethodfordeterminingthetransientresponsebehaviorofroadvehiclesISO/TR872580kmphinastraightlineRangeof−30degto+30deg,0.5HzExperttestdriversSubjectiveevaluation-Torsionalstiffnesseffect扭转刚度小大Objectiveevaluation-TorsionalstiffnesseffectCorrelationofTorsionalstiffnes

5、sYawgainincreasesby1.77%andtimelagdecreasesby4.12%with10%increaseinbodytorsionalstiffness.Subjectiveevaluation-LateralstiffnesseffectObjectiveevaluation-LateralstiffnesseffectCorrelationofLateralstiffnessYawgainincreasesby2.41%andtimelagdecreasesby4.57%with10%increaseinbodylateralstiffness.Validati

6、onBIWtorsionalstiffnessincreasedby29%SubjectiveevaluationValidationmodelTorsionalstiffnessConclusionOverallresponseofthevehiclehasimprovedduetotheincreaseintorsionalstiffnessoftheBIW.Theincreaseinlateralstiffnessofthefrontlowerarmattachmentpointsleadstosignificantimprovementinoverallvehicleresponse

7、butnomuchchangeisthereinthereturn-abilityofthevehicle.Reason提高横向刚度提高左右轮同步性讨论测量扭转刚度时，载荷为什么加到避震器安装点上？对于这类悬挂布置这种测试方法是否还有意义？这种方法是不是更通用？谢谢