汽車車身結構動態(tài)特性的設計方法研究.pdf

1、重慶大學碩士學位論文汽車車身結構動態(tài)特性的設計方法研究姓名：盧海峰申請學位級別：碩士專業(yè)：車輛工程指導教師：李克強20000501重慶夫學碩士學位論文ABSTRACTABSTRACTWRhgrowingdemandsforhighspeedandlightweightofvehicles，problemssuchaSstrengthstiffnessandresponseofcomplexdynamicloadofcarbodystru

2、cturehavebecomeincreasinglyurgentTraditionaldesignmethodsCanhardlymeettheneedsofthedevelopmentofmodemengineeringMechanicalproductswithoptimaldynamiccharacteristiCSCanbedevelopedonlywhenwefullyexploretheinterrelationshipa

3、mongthestructure’Snaturalcharacteristicstheextemalexcitationandthesystem’SdynamicresponseUptonowtherearetwowaystosolvetheseproblemsOneiSshapecarbasedexperimentInthiswayproblemsCanbediscoveredandeffec枉ofthesolutionCanbeev

4、aluatedHowevertwodisadvantagesexistFirstthismethodiSaimlesslyduetoiIsrelianceonexperiencesandrepetitivetestsSecondthismethodrequiresashapec越whichleadstohighcostandlongperiodAnotherwayiSfiniteelementtechnologybasedtheoret

5、icalanalysisT11iSmethodisalSOaimlesslyandtimeconsumingbecauseofthedependsonexperiencesandrepetitiveanalysisInmyopinionthekeytoovercometheaimlessnessindesigningandtoobtainoptimalresultsliesinafeasiblequickanalysistechniqu

6、eandse碰ngupdirectinterrelationshipamongdynamiccharacteristiCSofcarboaystructureevahiationindexofstrengthstifinessandstructureparametersmStechniquewillplayasignificantroleinshorteningtheperiodofdevelopingvehicleproductsan

7、dimprovetheirqualities，InthispaperacarbodydynamicdesignsystembyredevelopingcormnercialplafformhasproposedItaimstOsetupadirectlinkbetweendynamicindex(ie，strength，stiffness，anddynamiccharacteristic)andstructurefeatureparan

8、letersSOastoS01vethethornyproblemsindesignThecomofthesystemiS3DcarbodystructuremodelbasedonfeaturearchitectureandtheanalysismethodiSmatrixperturbationtheoryAdditionally，suchissuesasstructuregeometryfeatureandmodeldiscret