轮胎结构设计.ppt

FEMApplicationonTireDesign,锦湖轮胎,1.有限要素法介绍2.轮胎结构说明特征3.轮胎结构说明体系4.轮胎结构说明例题5.结论及希望效果,目录,有限要素法(FiniteElementMethod)?把像轮胎的结构物分割成有限个结构物，对分割的要素各自创建平衡方程式，把这组合到全体要素，对联力方程式求近似解（变位，应力，变形率）的数值解析方法。有限要素法不是绝对的性能预测，而是以相对VersionRanking工具使用。,有限要素法定义,有限要素法定义,EquationofMotionGeometry(Mesh)-.Node-.ElementMaterialProperty-.Rubber:E,v-.Cord:E,EPI,AngleBoundaryCondition-.-.,BasicElasticity,有限要素法正式化,PotentialEnergy:,VirtualWork:,FinalEquation:,1.Tread2.Carcass3.Belt4.Sidewall5.Bead6.Innerliner7.Capply8.Flipper9.Apex,轮胎结构说明特征,几何学的非线性-LargeDeformation,SmallStrain(X),LagrangianStrain(O),材料的非线形性-MaterialNon-Linearity,HyperelasticMaterialModel,Moony-RivlinModel系列(O),OgdenModel系列,经济条件的非线形性-Contact&Friction,Contactcondition,Frictioncondition,h,p,Frictionconstraint0(slip)Penaltymethod,Contactconstrainth0p=0(nopressure)h=0p0(contactpressure)Lagrangemultipliermethod,cr,CAD/CAE体系现况,KADAS是利用超级电脑，在产品设计阶段预测轮胎运行性能，即轮胎性能自动预测系统。KADAS是使用了最短点的数值解析方法，结构解析轮胎耐久力,磨损,牵引力,安全性,乘车感,噪音性能最低化的技术。KADAS为KumhoAutomatedDesignAnalysisSystem的缩略语，是缩短开发时间，减少开发费用,提高产品品质的技术。,KADAS定义,KADAS,KADAS,1,2,3,TireonlySmoothtireStaticanalysis,TireonlyPatterntireSteadyrolling,Tire+vehiclePatterntireTransientrolling,StrainenergyFootprintpressureSpringrateTemperature,Force&momentFrictionalenergyModalfrequencyHydroplaning,Durability&RRRide&handlingWear&TractionNoise&vibration,CAD/CAEseparationCAEprofessionals,CAD/CAEinterfaceFewengineers,CAD/CAEintegrationMostengineers,19952000()1(Vector),20012006()2(SMP),20072010()3(Cluster),KADAS,KADAS,1.TireStaticAnalysis,.Simulationitem:Strainenergy,Footprintpressure,Springrate,Cordtension,Dimension,Tirestaticanalysismodel,Straindistributionaroundtire,TireStaticAnalysis,2.TireThermalAnalysis,.Simulationitem:Temperature,Rollingresistance,Hysterisislossofrubber,Temperaturedistributioninsidetire,TireThermalAnalysis,3.TireSteadyRollingAnalysis,.Simulationitem:Force&moment,Strainenergy,Footprintpressure,Springrate,Cordtension,Dimension,Tirerollinganalysismodel,Tiredeformedshape,TireSteadyRollingAnalysis,4.TireModalDynamicAnalysis,NVH(Noise,Vibration,andHarshness).Simulationitem:Modeshape,Naturalfrequency,Frequencyresponse,Tiremodeshape(2ndmode),Frequencyresponsefunction(FRF),TireModalDynamicAnalysis,5.PatternTireRollingAnalysis,/,.Simulationitem:Force&moment,PRAT(PlysteerResidualAligningTorque)Frictionalenergy,Footprintpressure(Patterntire),Force&moment(PRAT)prediction,PatternTireRollingAnalysis,PatternTireAnalysis,6.TreadSlipAnalysis,.Simulationitem:Force&moment,PRAT,Frictionalenergy,Footprintpressure(Patternonly),Treadslipanalysismodel(TRESA),Frictionalenergydistribution,TreadSlipAnalysis,7.TireExplicitDynamicAnalysis,/NVH.Simulationitem:Cleatimpact,Cornering,Standingwave,Drytraction,Cleatimpactanalysismodel,Tireforcevariationduringcleatimpact,CleatImpactAnalysis,Standingwave,Criticalspeed.,7.TireExplicitDynamicAnalysis,StandingWaveAnalysis(CriticalSpeed),Axleforce,StandingWaveAnalysis,ESCOT.ESCOT.ESCOTExcellent&SmartContourOptimizationTheoryEscort.,8.TireShapeOptimizationAnalysis,.,Final,Proto,ESCOT-1(),.,.,Proto,Final,ESCOT-2(),Final,Proto,.ESCOT-3.,ESCOT-3(),9.TireFractureAnalysis,Global-Local.Simulationitem:Fatiguelifeinbeltedge&carcassedge,Globalanalysis,Localanalysis,Fatiguelife,10.TireUniformityAnalysis,Uniformity.Simulationitem:Lowspeeduniformity(RFV,LFV),Input,Solving,Output,Tireuniformitysimulationprocedure,TireUniformityAnalysis,11.AircraftTireAnalysis,.Simulationitem:Inflation,static,steadyrollinganalysis,Strainenergydistribution,Footprintpressuredistribution,12.TireManu