铁道车辆悬挂参数稳健性设计及多目标优化

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1、摘要列车安全以及稳定地运行是铁路运输的基本要求。高速列车的发展使得列车运行速度不断提升，这对于车辆运行的稳定性提出了更高的要求。车辆悬挂系统能够抑制蛇形运动，确保车辆运行的稳定性，它的设计非常重要。论文以CRH2动车组拖车为研究对象，建立了车辆动力学模型，并对该模型做了参数化处理，完成了临界速度、脱轨系数以及轮重减载率这三个车辆运行稳定性指标的计算。在此基础上，结合多目标优化软件Isight，通过最优拉丁超立方算法完成实验设计，进而建立车辆横向动力学Kriging近似模型，基于该近似模型运用归一法结合第二代非劣排序遗传算法完成了对上述车辆运行稳定性指标的多目标优化。

2、论文还运用蒙特卡洛模拟对这三个目标的稳健性作了分析，并运用6Sigma稳健优化方法对悬挂参数做了稳健设计。结果表明，经过优化的悬挂参数设置有利于提高车辆运行稳定性。关键词：铁道车辆悬挂系统稳定性稳健性设计多目标优化-I-AbstractItisbasicallyrequiredthattrainoperatessafelyandstably.Thedevelopmentofhigh-speedtrainsmakesthetrainspeedupgrade,putsforwardhigherrequirementfortherunningstabilityofvehi

3、cles.Thevehiclesuspensionsystemcaninhibittheserpentinemovement,whichcanensuretheoperationstabilityofvehicles.Itsdesignisveryimportant.BasedontheCRH2EMUtrailerastheresearchobject,thevehicledynamicsmodelisestablished,andthemodelhasbeenparameterized.Besides,thecalculationofthreevehicleope

4、rationstabilityindex:criticalspeed,thederailmentcoefficientandreductionrateofwheelload,wasdone.Later,thismodelwascombinedwiththemulti-objectiveoptimizationsoftwareIsight,soastocompletethedesignofexperimentsthroughoptimalLatinhypercubealgorithm.TheKrigingapproximationmodelforvehiclelate

5、raldynamicswasestablished,withwhichthemulti-objectiveoptimizationofthevehiclerunningstabilityindexwascompletedusingScalarandNon-DominatedSortingGeneticAlgorithm.MonteCarlosimulationwasusedtoanalyzetherobustnessofthreegoals,and6Sigmarobustoptimizationmethodwasutilizedtocompletetherobust

6、designofthesuspensionparameters.Theresultsshowthat,reasonablesuspensionparametersettingisbeneficialtoimprovingtherunningstabilityofthevehicle.Keywords:railwayvehicle;suspensionparameters;stability;robustdesign;multi-objectiveoptimization-II-目录第1章绪论......................................

7、..........................................................................11.1论文选题背景及意义....................................................................................11.2国内外研究现状............................................................................................11.3铁道车辆运行