微型客车车顶结构综合性能-分析与6σ稳健性多目标优化设计

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1、万方数据江苏大学专业硕士学位论文AbstractTheworld’Senvironmentisdeterioratingandtheenergyisgraduallydepleting．Automotivelightweighthasbecomethefocusofthecurrentautomotiveengineeringareasandaveryimportanturgentproblem．Inthisdissertation，aminibus’Sroofstruchlrecomprehensiveperformance，includingroofcrushresistance，

2、snow—coveredstrength，low·levelmodalcharacteristicsanddentresistance，wereanalyzedandevaluatedandtheinfluenceofloadingorderontheroofcrushstrengthwasassessed．Inaddition，basedonthetheoriesandmethodsof60robustnessoptimizationdesign，consideringthee圩ectofuncertaintyofplatethicknessontheperformanceofthe

3、roofstructure，roofstructurelightweightdesignwasresearched．(1)Theroofcrushfiniteelementmodelaminibuswasestablishedbyusingthepre-processingsoftwareHyperMeshandtheprocessofbuildingfiniteelementmodelwaselaborated．ForthestandardFMVSS216adoesnotprovideforbilateralroofcrushloadingorder，theroofcrushchar

4、acteristicswasanalyzedbyusingtwodifferentloadingmethods，theleftloadingfirstandrightloadingfirst．Theresultsshowthatthemaximumforceofroofcrushareeffectedbyloadingorder．InterInsofthisCar，thedeformationofthefirstloadingsideoftheroofreinforcestheroofcrushresistanceoftheothersideoftheroof．(2)Aassessme

5、ntmethodofbilateralroofrushresistancewasproposed．Theminimumvalueamongthemaximumroofcrushforceobtainedbytwodifferentloadingmethodsisselectedasabasisforassessingtheroofrushresistance．Iftheminimumvalueamongthemaximumroofcrushforceobtainedbytwodifferentloadingmethodsisnotlessthanthreetimesofunloaded

6、vehicleweight，roofcrushresistancequalifythestandardFMVSS216a，otherwiseunqualify．Forthisstudyminibus，theminimumvalueamongthemaximumroofcrushforceobtainedbytwodifferentloadingmethodsis3．5timesofunloadedvehicleweightandstandardFMVSS216a．Inaddition，roofstructuresnow·coveredstrength，low-levelmodalHI万

7、方数据微型客车车顶结构综合性能分析及66稳健性多目标优化设计characteristics，dentresistancewereanalyzedandevaluated．Analysisofroofstructurecomprehensiveperformancenotonlyprovidesareferenceforthedevelopmentoftheroofstructurebutalsoprovidessupportfor6Gmulti