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1、TheCAEAnalysisandOptimizationonFrameofFSAEBasedonFullVehicleofDynamicsSimulationADissertationSubmittedfortheDegreeofMasterCandidate：ChenBinSupervisor：Prof.MaLimingChang’anUniversity,Xi’an,China摘要車架作為FSAE賽車最重要的零部件之一，它是FSAE賽車大部分零部件和總成的載體，支撐著發(fā)動(dòng)機(jī)、轉(zhuǎn)向器、油箱和駕駛員等所有簧上質(zhì)量的有關(guān)機(jī)件。車架的功能是支撐連接FS
2、AE賽車的各零部件，并承受來自車內(nèi)外的各種載荷,為此車架應(yīng)該具有足夠的強(qiáng)度、合適的剛度、合理的動(dòng)態(tài)特性和輕量化度。本文使用ADAMS/car虛擬樣機(jī)仿真軟件建立FSAE賽車的整車動(dòng)力學(xué)模型，對(duì)FSAE賽車進(jìn)行多工況仿真，結(jié)合比賽相關(guān)要求和規(guī)定，求出FSAE賽車在各個(gè)工況下的不同部件與車架連接點(diǎn)的受力；在此基礎(chǔ)上使用ANSYS有限元分析軟件對(duì)FSAE賽車車架進(jìn)行有限元強(qiáng)度、剛度和模態(tài)分析；最后，對(duì)車架進(jìn)行優(yōu)化，得到安全性更高、操穩(wěn)性更好和輕量化度更高的FSAE賽車，并為FSAE賽車的再設(shè)計(jì)提供理論依據(jù)和建議。通過對(duì)FSAE賽車車架的有限元分析，對(duì)車架的
3、強(qiáng)度、剛度和模態(tài)特性進(jìn)行了校核，車架各工況的最大應(yīng)力均小于材料的許用應(yīng)力，車架的固有頻率在賽車的非共振區(qū)內(nèi)，因此車架的強(qiáng)度和模態(tài)特性無需優(yōu)化；車架的剛度存在優(yōu)化的空間，進(jìn)而對(duì)車架的剛度進(jìn)行優(yōu)化設(shè)計(jì)，從而使車架具備更高的剛度，提高FSAE賽車抵抗變形的能力和操縱穩(wěn)定性。關(guān)鍵詞：方程式賽車車架，ADAMS/car，ANSYS，靜力學(xué)分析，模態(tài)分析IAbstractAsoneoftheprincipalparts,theframeistheFSAEracingcarcarrierofmostofthepartsandassemblies,itsupport
4、stherelatedpartsofallsprungmass,suchasengine,deflector,tankanddriverandsoon,meanwhileitreceivethedifferentkindsofforceandmomentwhichallsprungmasshanddownto.Wherefore,theframeshouldhaveadequatestrength,appropriatestiffness,reasonabledynamicbehaviorandlight-weightdegree.Inthispap
5、erADAMS/carvirtualprototypesimulationsoftwareisusedtoestablishtheentirecardynamicsmodelofFSAEracingcar,somesimulationofmulti-conditionsimulationforFSAEracingcarisdone,combinedwithrelatedrequirementsandregulations,andthestressofdifferentpartsandframeconjunctionateachconditionofF
6、SAEracingcarisdetermined;thenANSYSfiniteelementanalysissoftwareisusedtoproceedtheanalysesoffiniteelementstrength,stiffnessandmodalityforFSAEracingcar;intheendtheframeisoptimizedtogettheFSAEracingcarwhichhavehighersecurity,betterhandlingstabilityandhigherlight-weightdegree,meanw
7、hileprovidetheoreticalbasisandsuggest.AccordingtothefiniteelementanalysisofFSAEracingcar,inthispaperthestrength,stiffnessandmodalityoftheframeischecked,indifferentconditionsthemaximumstressoftheframeislessthanthematerialpermissiblestress;andtheinherentfrequencyoftheframeiswithi
8、nthenon-resonanceregionofracingcar,sothestrengthanddyn
