无砟轨道垂向轮轨力疲劳荷载谱编制方法的研究

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关键词：垂向轮轨力；GPD理论；极值估计；形状参数;疲劳荷载谱 中图分类号： U213.2+1 ;U211.4 文献标志码：A DOI:10.16385/j.cnki.issn.1004-4523.202403005

Compilation method of fatigue load spectrum for vertical wheel-rail force ofballastless track

GUO Jie1,23,， YANG Rongshan23

(1.SchoolofTransportation Engineering，Jiangsu Universityof ArchitecturalTechnology，Xuzhou 221116，China; 2.MOEKeyLaboratoryof High-speed Railway Engineering，Southwest Jiaotong University，Chengdu 610031，China; 3.School ofCivil Engineering，Southwest JiaotongUniversity，Chengdu61oo31，China）

AbstractIndtopiltieldsectfetiallefolsstrckitieaytee extremevalueoftevticallrailfoetoobtaintheextrevueestimatiosofteveicallrailfoeintholelifecyle. BasedngeneralizedParetodistribution(GP)theorytheautomatic treshold methodisusedtoeterminethethesholdintepaperand themethodofverticalwhe-railforeextreeestimationandthefatigueloadspetrmcompilationaresudiedTersultssotate estimationetofetialel-ilfemaisaldypleoeationdailuematiosil wheel-railforceadwioutsapledusteringaalwayssallrtanthruaueOnttrary，theplecoelatioalitle influenceonttitioeofertialelailfemiesatisfactoretiatiofertall forcecanbeobdwioutspledusteig.Iodertoimproeteestimationeectofverticalwhl-railforcemaxithesamples aredeclusteedtodeoelatweetatadetoolepobofsretesoftitioslical wheelrailfoeaihaeraeertealisproosdteutaatisofertiallfoe Thereisalinearrelationshipbetweentheshape parametersandthemaximumvalueestimationsofvertical whel-railforce，andrelevant parametersandtereasoablesamplesizeforeachclusteraredetermied.Te3gradefatigeloadspectrumsofverticalwl-railforefor balastlesstrackwithdiferenttrainspeesaredevelopedThefatigueloadspectrumsofalastlesstracksowtypicalpositiveskew characteristics.

Keywords: verticalwhel-railforce; GPDtheory;extreme value estimation;shape parameter; fatigue load spectrum

垂向轮轨力是无砟轨道结构承受的主要疲劳荷载之一。（剩余27878字）