整理汽车安全气囊碰撞有限元分析外文翻译Word文件下载.docx

整理汽车安全气囊碰撞有限元分析外文翻译Word文件下载.docx

《整理汽车安全气囊碰撞有限元分析外文翻译Word文件下载.docx》由会员分享，可在线阅读，更多相关《整理汽车安全气囊碰撞有限元分析外文翻译Word文件下载.docx（13页珍藏版）》请在冰豆网上搜索。

整理汽车安全气囊碰撞有限元分析外文翻译@#@FINITEELEMENTANALYSISOFAUTOMOBILE@#@CRASHSENSORSFORAIRBAGSYSTEMS@#@ABSTRACT@#@Automobilespringbiascrashsensordesigntimecanbesignificantlyreducedbyusingfiniteelementanalysisasapredictiveengineeringtool.Thesensorsconsistofaballandspringscasedinaplastichousing.Twoimportantfactorsinthedesignofcrashsensorsaretheforce-displacementresponseofthesensorandstressesinthesensorsprings.Inthepast,sensorsweredesignedbybuildingandtestingprototypehardwareuntiltheforce-displacementrequirementsweremet.Prototypespringsneedtobedesignedwellbelowtheelasticlimitofthematerial.Usingfiniteelementanalysis,sensorscanbedesignedtomeetforcedisplacementrequirementswithacceptablestresslevels.Theanalysisprocedurediscussedinthispaperhasdemonstratedtheabilitytoeliminatemonthsofprototypingeffort.@#@MSC/ABAQUShasbeenusedtoanalyzeanddesignairbagcrashsensors.Theanalysiswasgeometricallynonlinearduetothelargedeflectionsofthespringsandthecontactbetweentheballandsprings.Bezier3-Drigidsurfaceelementsalongwithrigidsurfaceinterface（IRS）elementswereusedtomodelball-to-springcontact.Slidelineelementswereusedwithparallelslidelineinterface（ISL）elementsforspring-to-springcontact.@#@Finiteelementanalysisresultsfortheforce-displacementresponseofthesensorwereinexcellentagreementwithexperimentalresults.@#@INTRODUCTION@#@Animportantcomponentofanautomotiveairbagsystemisthecrashsensor.Varioustypesofcrashsensorsareusedinairbagsystemsincludingmechanical,electro-mechanical,andelectronicsensors.Anelectro-mechanicalsensor（seeFigure1）consistingofaballandtwospringscasedinaplastichousingisdiscussedinthispaper.Whenthesensorexperiencesaseverecrashpulse,theballpushestwospringsintocontactcompletingtheelectriccircuitallowingtheairbagtofire.Theforce-displacementresponseofthetwospringsiscriticalindesigningthesensortomeetvariousaccelerationinputrequirements.Stressesinthesensorspringsmustbekeptbelowtheyieldstrengthofthespringmaterialtopreventplasticdeformationinthesprings.Finiteelementanalysiscanbeusedasapredictiveengineeringtooltooptimizethespringsforthedesiredforce-displacementresponsewhilekeepingstressesinthespringsatacceptablelevels.@#@Inthepast,sensorsweredesignedbybuildingandtestingprototypehardwareuntiltheforcedisplacementrequirementsweremet.Usingfiniteelementanalysis,thenumberofprototypesbuiltandtestedcanbesignificantlyreduced,ideallytoone,whichsubstantiallyreducesthetimerequiredtodesignasensor.Theanalysisprocedurediscussedinthispaperhasdemonstratedtheabilitytoeliminatemonthsofprototypingeffort.@#@MSC/ABAQUS[1]hasbeenusedtoanalyzeanddesignairbagcrashsensors.Theanalysiswasgeometricallynonlinearduetothelargedeflectionsofthespringsandthecontactbetweentheballandsprings.Variouscontactelementswereusedinthisanalysisincludingrigidsurfaceinterface（IRS）elements,Bezier3-Drigidsurfaceelements,parallelslidelineinterface（ISL）elements,andslidelineelements.Thefiniteelementanalysisresultswereinexcellentagreementwithexperimentalresultsforvariouselectro-mechanicalsensorsstudiedinthispaper.@#@PROBLEMDEFINITION@#@Thekeycomponentsoftheelectro-mechanicalsensoranalyzedaretwothinmetallicsprings（referredtoasspring1andspring2）whicharecantileveredfromarigidplastichousingandasolidmetallicballasshowninFigure1.Theplastichousingcontainsahollowtubeclosedatoneendwhichguidestheballinthedesireddirection.Theballisheldinplacebyspring1attheopenendofthetube.Whenthesensorisassembled,spring1isinitiallydisplacedbytheballwhichcreatesapreloadonspring1.Theballisabletotravelinonedirectiononlyinthissensorandthisdirectionwillbereferredtoasthex-direction（seetheglobalcoordinatesystemshowninFigure2）inthispaper.Onceenoughaccelerationinthex-directionisappliedtoovercomethepreloadonspring1,theballdisplacesthespring.Astheaccelerationappliedcontinuestoincrease,spring1isdisplaceduntilitisincontactwithspring2.Once@#@Figure1.Electro-mechanicalautomobilecrashsensor.@#@contactismadebetweenspring1andspring2,anelectriccircuitiscompletedallowingthesensortoperformitsfunctionwithintheairbagsystem.@#@FINITEELEMENTANALYSISMETHODOLOGY@#@Whencreatingafiniteelementrepresentationofthesensor,thefollowingsimplificationscanbemade.Thetwospringscanbefullyrestrainedattheirbasesimplyingaperfectlyrigidplastichousing.Thisisagoodassumptionwhencomparingtheflexibilityofthethinspringstothestiffplastichousing.Theballcanberepresented