高速铁路扣件状态不良动态响应诊断方法

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关键词：扣件状态诊断；车辆动态响应；广义解调时频分析方法；SSA-SVM模型 中图分类号： U213.5+3 ；TN911.7 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202305008

Abstract：Inordertoimprovetheintellgenceoffastenerdiseasediagnosis，afastenerconditiondiagnosismethod isproposed basedonvehicle dynamic responsedataandgeneralizeddemodulation time-frequencyanalysiscombined with sparowsearchalgo rithm-supportvectormachine（SSA-SVM）model.Theaccelerationsignalsofthenormalandabnormalsectionsofthefastenerare colected，andtheshort-timeFourier transfor andthe maximumoverlappingdiscrete waveletpackettransformareusedtoprepro cess thesignaldata.Thegeneralizeddemodulationtime-frequencyanalysis methodisusedtodecomposethesignal，andtheeffectivevalue，energycontributionrateandwavelengthofthemain informationcomponentsarecalculatedasthecharacteristicindex. ThecharacteristicindexistraiedbythejointSSA-SVMmodeltoconstructtheclasificationmodel.Theresultsshowthattheaccuracy of the method is 97.50% ，and several evaluation indicators are used to verify that its effectiveness and accuracy can meet the actual needs.

Keywords：fastenerstatusdiagnostics；vehicledynamicresponse；generalizeddemodulationtime-frequencyanalysismethod; SSA-SVM model

高速铁路列车的行驶安全与轨道状态密不可分[，而高速铁路轨道的扣件结构是其中的重要组成部件之一，起到了降噪缓振、固定钢轨与轨枕的作用[2。（剩余13378字）