轻型载重汽车正面碰撞控制结构分析与改进

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1、大连理工大学硕士学位论文轻型载重汽车正面碰撞控制结构分析与改进姓名：王晓峰申请学位级别：硕士专业：车辆工程指导教师：王健20081201轻型载重汽车正面碰撞控制结构分析与改进TheStructureAnalysisandImprovementforLight—DutyTruckImpactSafetyAbstractThestructureofthelightdutytruckdecidesthatthedistancebetweenthepassengersandthefrontfaceisSOshort．Sothepassengerswouldbepresseda

2、ndleadtodeathwhenaccidentoccurred．Inourcountry，commercialvehicledropsbehindpassengercarevidentlyinsafetytechnologyandequipment．Insufficientattentionispaidtocommercialvehiclepassivesafetyandnocompellingruleiscarriedoutforthemoment．Itbecomesamoreandmoreseriousproblemthatpassivesecurityofc

3、ommercialvehiclebecausethedemandoftruckofhi吐speedandburden．Toprotectthepassengersandpromoteourcountrytransportationindustryandtheautomotiveindustry，theresearchonsecurityoflight—dutytruckisneeded．Onthereferenceoftheresearchaboutvehicle’Ssecurityathomeandabroad,itestablishesawayforcouplin

4、gthevehicledecelerationand也eoccupantrestraintsystem．thethesisdidcomputersimulationbasedonnon-linerFEMfora1ightdutytruckwhichisdesignedbyadomesticcorporation．Atonetime，particularanalysisWasaccomplishedforthevarietycharacteristicsofdisplacementoftruckandthemainparts．Aimingattheformerdesig

5、n’Scrashingsafetydef-ects，theenergy-absorptiondevice丽mthemulti-celltubehasbeendesignedandthecorrespondingsubstructureofthetruckhasbeenimproved．Thetruck’Scrashingsecurityhasbeenincreasednotablyshownfromthedummycrashingtestresult．StablefoldingmodeofvehiclefrontrailsduringfrontalimpactiSth

6、ekeytoachievedesireddecelerationpulse．AtlaSt．thedifferenceenergyabsorptiondevicehasbeencomparativestudiedandoptimized．Using矗niteelementsimulationandtestvalidation．bendingstiffnessofthin．Wallsquaretubesandthecharacteristicsofthedeformationinitiatorsarestudiedforachievingappropriateenergy

7、absorption．Anewconstrained-initiatedsquaretubeisdesignedforfrontframedeformationandcreatesaprocessfordesigningandimprovingvehiclefrontalcrashperformance．KeyWords：LightDutyTruck；Safety；Simulation；Energy-absorptionComponent—II—大连理工大学学位论文独创性声明作者郑重声明：所呈交的学位论文，是本人在导师的指导下进行研究工作所取得的成果