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1、武汉理工大学硕士学位论文武汉理工大学硕士学位论文轿车车身结构振动特性研究与设计优化姓名：张胜俊申请学位级别：硕士专业：车辆工程导教师：乐玉汉20100501武汉理工大学硕士学位论文AbstractInmodemsocietyvehiclehasbecomeaveryimportanttransport,andiscloselyrelatedtopeople'sbasicnecessities.China'spassengercarsalesin2009reachedmorethan1,000units,upto59%growthrateforChina'sautoin
2、dustrysettinganewmilestone.Benefitedfromthegovernmenthavingintroducedvariousfiscalincentives,theoverallautomotivemarketinChinalastyearsoldmorethan1,350units,upintheworld,with44%recordhighgrowthleaderintheglobalautomotiveindustry.Asanessentialmeansoftransporttosociety,theautomotiveindust
3、ryhasbeendevelopingsignificantly.Toalargeextent,acountry'sautomobileindustrylevelreflectsthelevelofitstechnologicaldevelopment.AlthoughChina'sautomobileproductionandsalesin2009rankedfirstintheworldinonefellswoop,butweshouldknowthehugegapintheautomotiveCAD/CAEtechnologybetweenthedomestic
4、carandforeigncountries.Carbodyisoneofthethreeassemblyofthecar,whichnotonlyhasbeautifulformandappearance,enoughspaceandsmoothshapecurve,butalsosuperiorperformanceismoreimportant.Currently,usingfiniteelementmethodtoaccuratelypredictthevariousperformancesofcarbodyduringthe3Ddigital-analogd
5、esignisanimportanthotautomotivetechnologyresearchcontent.Duringthedesignstagemodalbodystructure,accuratyanalyseofstrengthandrigidity,etc.,andsolvetheprobleminthedigital-analogstage,therebygreatlyreducevehicledevelopmenttimeandthecost..Thispaperbrieflydescribedthedevelopmentandapplicatio
6、nofvehicleCAEtechnologyinsystem,thebasicconceptsoftheinherentcharacteristicsofthebodystructure,basictheoryoffiniteelementmethodandapplicationinthebodystructure,modalanalysisandoptimizationdesigntheory.Andtheseprovideatheoreticalbasisfortheentirepaper.Combinationofgraduatestudentstakepar
7、tinthedevelopmentofa0.8Ltwomicrocar,whitebodystructureandthesub-assemblyofthestructureandfiinctionofadetailedintroduction.Useofthe3Ddigital-analogofMinicarbodystructure,firstlysimplifythestructure,includinghowtodealwithareasonablestructureincludingflange,holesandstrengthenthete
