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1、汽车工程2017年(第39卷)第4期AutomotiveEngineering2017(Vol.39)No.4doi:10.19562/j.chinasae.qcgc.2017.04.010∗SUV前端造型对行人下肢损伤影响的定量研究张冠军,秦勤,陈峥,曹立波(湖南大学,汽车车身先进设计制造国家重点实验室,长沙410082)[摘要]为在造型设计阶段充分考虑汽车的行人碰撞安全性能,以提高汽车的开发效率和行人安全性,提取了77款SUV侧视图的轮廓线及其特征参数,构建并验证了SUV前端造型的简化有限元模型,并依据EuroNCAP评价
2、规则进行行人安全性能仿真。以造型特征参数为自变量,损伤参数为因变量,采用多重线性回归分析方法分别对有无扰流板的两类车型筛选出对下肢损伤有显著影响的造型特征参数,并建立回归模型。分析结果表明,有前保险杠扰流板的SUV在造型设计时应增大保险杠中心离地高度、保险杠宽度和扰流板相对于保险杠的前伸量;无扰流板的SUV则应增大保险杠上参考线离地高度、进气格栅曲率半径,减小保险杠下参考线离地高度。建立在量产车型造型特征基础上的汽车前部简化模型通过EuroNCAP试验数据的验证,不仅能表征造型信息,也具备结构属性,对于结构设计前的造型设计具有
3、指导作用。关键词:SUV;行人下肢损伤;造型;有限元方法;多重线性回归分析QuantitativeStudyontheEffectsoftheFrontendStylingofSUVonPedestrianLowerLimbsInjuryZhangGuanjun,QinQin,ChenZheng&CaoLiboHunanUniversity,StateKeyLaboratoryofAdvancedDesignandManufacturingforVehiclebody,Changsha410082[Abstract]Forfu
4、llyconsideringthepedestriansafetyperformanceofvehicleincrashaccidentinordertoenhancethedevelopmentefficiencyandpedestriansafety,theside-viewcontoursof77SUVsandtheirstylingfea-tureparametersareabstracted,thesimplifiedFEmodelforthefront-endofSUVsaresetupandverified,an
5、dasimulationonthepedestriansafetyperformanceofvehicleisconductedbasedonEuroNCAPevaluationrule.Withstylingfeatureandinjuryparametersasindependentanddependentvariablesrespectively,thestylingfeatureparam-etersofbothcategoriesofvehiclewithandwithoutbumperspoiler,havinga
6、pparenteffectsonthelowerlimbsinju-riesofpedestrianareselectedbyusingmultiplelinearregressionanalysiswithcorrespondingregressionmodelestab-lished.TheresultsofanalysissuggestthatSUVswithbumperspoilershouldchoosehigherheightofbumpercenter,widerbumperwidthandlargerprotr
7、usionofspoilerrelativetobumperinstyling,whileSUVswithoutspoilershouldincreasetheheightofbumperupperreferencelineandthecurveradiusofairinletgrilleandreducetheheightofbumperlowerreferenceline.Thesimplifiedmodelforvehiclefront-end,verifiedbyEuroNCAPtestdataandbasedonth
8、estylingfeaturesofmass-producedvehicles,cannotonlycharacterizestylinginformation,butalsohasstruc-turalattributes,playingaguidingroleinstyl