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1、第48卷第24期机械工程学报Vol.48No.242012年12月JOURNALOFMECHANICALENGINEERINGDec.2012DOI：10.3901/JME.2012.24.106*地铁车辆车轮多边形化形成原因分析1,213马卫华罗世辉宋荣荣(1.西南交通大学牵引动力国家重点实验室成都610031；2.南车戚墅堰机车有限公司常州213011；3.西南民族大学计算机科学与技术学院成都610041)摘要：针对地铁车辆车轮多边形化问题，探讨分析车轮多边形化形成原因。提出车轮多边形化是由车轮滚动多周的振动所形成的这一创新观点，并分析车轮多边形化的顶点相位角、主振频率与运行速
2、度之间的关系。以某直线电动机地铁车辆为例，基于建立的多体动力学模型，研究各速度下轮轨垂向力的主导频率，分析易产生车轮9边形化的速度及主导频率特性，指出在72～80km/h的速度范围内，该直线电动机地铁车辆有形成车轮9边形化的可能。以72km/h和80km/h为例，给出此速度下的轮轨垂向力及其主导频率、前转向架直线电动机垂向振动加速度及其主振频率，结果表明两种速度下主导频率分别为39.08Hz和43.48Hz的振动有形成车轮9边形化的趋势。指出各速度下的相位角变化，并给出车轮9边形化的示意图。关键词：地铁车轮多边形化动力学频率中图分类号：U270AnalysesoftheFormRe
3、asonofWheelPolygonizationofSubwayVehicle1,213MAWeihuaLUOShihuiSONGRongrong(1.TractionPowerStateKeyLaboratory,SouthwestJiaotongUniversity,Chengdu610031;2.CSRQishuyanLocomotiveCo.,Ltd.,Changzhou213011;3.CollegeofComputerScienceandTechnology,SouthwestUniversityforNationality,Chengdu610041)Abstrac
4、t：Aimedatthewheelpolygonizationproblemofthesubwayvehicle,discussedtheformingreasonofthewheelpolygonization,putforwardtheinnovationpointthatthewheelpolygonizationiscausedbythewheel/railvibrationduringmanywheelrollingcircles,andderivedtherelationbetweenthephaseangleofthevertex,mainvibrationfrequ
5、encyandtherunningspeedofthepolygonizationwheel.Takeonekindoflinearinductionmotorsubwayvehicleforexample,basedonthemulti-bodysystemdynamicmodel,themainfrequencyofthewheel/railverticalforceunderdifferentspeedisresearched,thespeedandmainfrequencywhicheasilyinducedthewheelpolygonizationwith9vertex
6、esisanalyzed,andpointedoutthatthewheelpolygonizationwith9vertexesofthesubwayvehiclemaybeformedduringthespeedscopefrom72km/hto80km/h.Takethecaseof72km/hand80km/hforexample,theresultsofthewheel/railverticalforceandthemainfrequencyisgiveninthepaper,aswellastheLIMofthefrontbogie.Simulationresultss
7、howthatthewheelpolygonizationwith9vertexesmaybeformedbythevibrationwiththefrequencyof39.08Hzand43.48Hz.Thephaseanglechangesbetweenthedifferentspeedsarepresentandthesketchmapofthewheelpolygonizationwith9vertexesisgiven,too.Keywords：Subwa
