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《基于多目標(biāo)優(yōu)化的客車車身骨架輕量化設(shè)計》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫。
1、摘要到了在輕量化效果，并驗證了結(jié)構(gòu)改進(jìn)后車身骨架在各個工況下的強(qiáng)度、剛度以及車身骨架的開口變形，并對車身骨架的前十階模態(tài)的動態(tài)剛度特性進(jìn)行了驗證，最終車身骨架質(zhì)量由1840kg下降到1717kg，車身骨架質(zhì)量減重約123kg，約占整車車身骨架的6.7%。扭轉(zhuǎn)剛度由56.4N.m/(o)提高到60.1N.m/(o)，一階扭轉(zhuǎn)頻率由6.3HZ上升到6.5HZ，最終完成車身骨架的輕量化設(shè)計，確定輕量化方案的可行性。關(guān)鍵詞：純電動公交客車；APDL；有限元分析；ISIGHT；多目標(biāo)優(yōu)化；Pareto；輕量化Ⅱ萬方數(shù)據(jù)AbstractAbstractBusbodyisanimporta
2、ntandthemainbearingpartofthebus.Sincethebodyweightaccountsforalargeproportionofthetotalvehiclequality,thereasonablebodyframelightweightdesignhasaveryimportantsignificancetoreducethevehiclequality.ThispapertakestheG610A-PDtypeelectricbusofHebeiJieshenAmperexTechnologyCo.,Ltd.astheresearchobj
3、ect.Alightweightdesignplatformofthebodyframebasedonmultiobjectiveoptimizationisestablished.Themainresearchcontentsincludethefollowingaspects:(1)Thebodyframestructureofthepureelectricbusisanalyzed,andthemodelissimplifiedaccordingtothecharacteristicsofthebusbodyframe.Subsequently,thefiniteele
4、mentmodelofthebodyframeisestablished.Thegeneraldrivingconditionsandthetechnicalindexofelectricbusbodyaredetermined.(2)Theloadandconstraintofthebusinvariousconditionsareanalyzed.Inaddition,thestrengthandstiffnessofthebusinallconditionsareanalyzed.Thetorsionalrigidityandtheopeningdeformationo
5、fthevehiclebodyframeunderdifferentconditionsarefocusresearchedandtherelevanttechnicalevaluationisaccomplished.Basedonthemodalanalysistheory,theanalysisandevaluationofthemodalfrequenciesandshapesofthebodyframearecarriedout.Thedynamicstiffnesscharacteristicsofthebodyframeareanalyzed,andthefir
6、sttenmodesareanalyzedemphatically,whichprovideanimportantbasisforthefurtherstructuralimprovementandareferenceforthebodyframelightweightdesign.(3)BasedontheadvantagesofISIGHTinthemulti-objectiveoptimizationdesign,theoptimizationofthebusbodyframeiscarriedout.ThroughtheintegrationofANSYSlargef
7、initeelementanalysissoftware,amulti-objectiveoptimizationdesignplatformissetup.ThevisualmodelofbodyframeisbuiltbyAPDLlanguagesoastorealizeautomaticmodeling,automaticsimulationandthusachievetheeffectofautomaticoptimization.Anewmethodforlightweightdesignof
