大客車翻滾碰撞性能研究及改進(jìn)設(shè)計(jì).pdf

1、Y774098分類號(hào)：密級(jí)：。專峨差≮式等學(xué)位論文單位代碼：10019學(xué)號(hào)：S0266大客車翻滾碰撞性能研究及改進(jìn)設(shè)計(jì)CrashworthinessResearchandImprovementDesignofaPassengerBusUnderRollingcrash研究生：酆丞園9————指導(dǎo)教師：旦茁副數(shù)援。合作指導(dǎo)教師：申請學(xué)位門類級(jí)別：專業(yè)名稱：研究方向：所在學(xué)院：王堂墅——一固佳左堂——一——查阻丞西：簋——堡堂匠——2005

2、年3月AbstractCollisionsafetyofbushasbeenpaidmuchattentioninrecentyears，rollovercollisionisoneofthehighestcasualtyratioconditionintrafficaccidentsNowadays，obligedregulations011collisionsafetyofbushasnotbeencarriedoutinChina

3、ofcourse，experimentsaboutrollovercollisionhavenotbeendoneRecentl5thegovernmenthasbeguntodraftouttheregulationaboutupsidestructures仃engthofbusreferringtoECER66，andtheexecutionofthisregulationwillgreatlyreducethecasualtyBe

4、causetherearenostandardregulations，atpresentanalysisaboutbuschassisislimitedtostaticcondition，andbeforenowtherearenoliteraturespublishedInthispapersimulationanalysisofrollovercollisionhasbeendoneontheframeofcertainkindof

5、civilmanufacturedbusaccordingtoECER66inthispaperBasedonsimulationresults，thedesignofbusframeshasbeenoptimized，theoptimizedonecanmeettherequirementsofcollisionsafetyTheresearchworkmainlyincludes：1)Staticanalysis：checkings

6、trengthandrigidnessoftheframeunderthethreetypicalworkingconditions，andfmdingthefragilepartofthestructure，andprovidingthecriterionfordesign2)Modalanalysis：analyzingnaturalfrequencyandvibrationmode，andprovingthatnaturalfre

7、quencyavoidsthemainexcitingfrequencyandmeetsdesignrequirements，andverifythemodalbyuseofanalogymethod3)Rollovercollisionanalysis：simulationcalculationsoftheframearecarriedoutreferringtoECER66，thenimproveddesignbasedonanal

8、ysisresults，satisfyingtheECER66tothefullextent4)AccordingtothedataofatypicaltrafficaccidentthathappenedrecentlytheprocessofrollovercollisioniSsimulatedthestructureiSimprovedbasedonsimulationresultsKeywords：passivesafetyf