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ID:32011339
大小:12.36 MB
页数:85页
时间:2019-01-30
《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》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
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
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