energy loss in vehicle to vehicle oblique impact

《energy loss in vehicle to vehicle oblique impact》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、InternationalJournalofImpactEngineering36(2009)512–521ContentslistsavailableatScienceDirectInternationalJournalofImpactEngineeringjournalhomepage:www.elsevier.com/locate/ijimpengEnergylossinvehicletovehicleobliqueimpactDarioVangiDepartmentofMechanicandIndus

2、trialTechnologies,UniversityofFlorence,ViaS.Marta,3,50139Florence,ItalyarticleinfoabstractArticlehistory:Sincetheseventies,manymethodologieshavebeendevelopedforestimatingfromenergylossthedeltaReceived8April2007Vproducedinavehicletovehicleimpact.Normalenergy

3、loss,iscalculatedbyadiscretenumberofReceivedinrevisedform1September2008residualcrushmeasurementsinthedirectionparalleltothevehicle’saxis,usingthestiffnesscoefficients.Accepted4September2008Inthecaseofobliqueimpact,acorrectionfactorisappliedtothenormalenergyl

4、osstodetermineenergyAvailableonline16September2008lossintheimpulsedirection.Inthispapertheconceptofprincipaldirectionofdeformationisintro-duced,presentinganewmethodforestimatingenergylossinvehicletovehiclecollision,startingfromKeywords:adiscretenumberofcrus

5、hmeasurements,whichare,however,performedconsideringtheeffectiveVehicletovehiclecollisiondisplacementofthepointsduringthecrush.Thisnovelapproach,inadditiontoprovidingamoreObliqueimpactEnergylossrigorousmodelofthephysicalphenomena,leadstoimprovementintheresul

6、ts:withthenewapproach,Residualcrushmeasurementthemeanerrorcommittedinestimatingenergylossisabout10%,ascomparedtothe20%ofthepreviousPrincipaldirectionofdeformationmethodology.Ó2008ElsevierLtd.Allrightsreserved.1.Introductiongenerallyapplicable,butfewercrasht

7、estsareneededtodeterminethevehicle’sstiffness.TheresidualdeformationsinavehiclehavelongbeenusedtoThedataacquiredfromcrashtestsareprocessedtoobtaintheassesstheseverityoftheimpactonthevehicle.Infact,therearestiffnesscoefficientsinthehypothesisoflinearapproxima

8、tionofmanymethodsforestimatingtherelativevelocityordeltaVoftwotheforce-crushcurveasF¼AþBC,withthecoefficientsAandBcollidingvehiclesatimpact,bysimplyevaluatingenergylossandwiththecrushmeasurementC[8,9].d