路基不均匀沉降引起的轨道损伤变形及其对车轨动力响应的影响分析

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关键词：高速铁路;无砟轨道；塑性损伤；内聚力模型;沉降变形；轮轨关系；耦合振动 中图分类号：U260.11 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202401082

Abstract：Ierteigatetheoeudtooetydoatialpfflek inthesubgradsmetdieaalsodelfoIabblsstacksidesutualt andinter-laeradsionbetweenrackcompoentsasestablsdbasdontfiiteelemetmetodadcocreteplastcdamagecostutie theory.Theefectofselementposition，wavelength，andamplitudeontheeformationanddamageoftetrackstructurewasstudied. Furtherore，adynamicouplingmodelofigspeedveicle-track-sugradesystemwasestablishedusingtefiiteelement-multi-body dynamics （FE-MBD）mtodtoanalyzethedynamicresponseofthecoupledsystemuderdiferentialstlement.Theresultsindicatethat whensetlemtocsattejtetweteeaoscseailsplacetistestdacosoicasor firstinecbeeafbldlett amplitude，showinganbvisicreasingtrendwittheicreaseinsetlmetamplitdeTeverticalforeetweeteheeadtherail， as wellasthevibationresponseofthetrackstructure，exhibitanincreasingtrendfolowedbyadcreasingtrendwiththeincreasein settlement wavelength.Settlement-induceddeformationand its increased amplitudebelowasettement wavelength of 15m haveasignificant impactonthedynamicresponseoftevehicl-tracksystemandshouldbegivendueatention.Thesearchconclusionscanprovidereferece fortheoperaoofgspedasisubdesteesdepeveotrolofuevestmteatedacdis

Keywords：esac;soeloosp vibration

既有铁路运营情况表明，在软土和松软土地基上修建路基，常易产生不均匀沉降[1。（剩余15935字）