无缝线路锁定轨温衰减规律与原因分析

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1、AbstractABSTRACTThestress．freetemperatureofcontinuousweldedrail(CWR)isabenchmarkoftheamplitudeofrailtemperaturestresswhichreflectsthestateandamplitudeofthelognitudinalstressoftherailunderdifferenttemperatures．Thestress—freetemperature，trackbedbearingcapacityandlateralandlognitudi

2、nalresistanceconstitutesinindexesestimatingthestrengthandthestabilityofCWR．Sostress‘freetemperatureiSoneofthemostimportantdataofCWR．Whetheritistrueor,itwilldirectlyrelatestabilityofCWRandsecurityofmaintainenceandmanagement．BasedonthedataofraillengthinCWRintermediaterepairingoftra

3、ckandreplacingIll-typeconcretesleeperbymachinelayoutinHuningrailway1999，thepaperstudiesCWRprotractionandstress．freetemperatureattenuationlawfromrailresidualstress，creepage，plasticwheelrollingandSOon．ThusthepapergivesthedirectionsintheoryandpracticeforlearningconditionsofCWRstress

4、-freetemperature，establishingsystemsofmaintainenceandmanagementofCWR．Itisverydifficultandfussybutveryimportantandserioustostudythelawofstress．freetemperatureattenuating，especiallyweshouldmakequantificationalresearchintheorythoroughly．Combiningwithmyworkofmanagingnewrailwaysofmore

5、than200km／handcondlitionsoflesstrainoperationatinitialstagesafterbuildingupnewrailways，1willstudytheproblemswithrespecttothestress-freetemperatureattenuationsinthefuture，asfollows：1．Toanalyzetheeffectofdifferentpavingmethodsanddifferentstabilityconditionsoftrackbedonstress-freete

6、mperaturecorrectivity．2．Toanalyzetherelationshipbetweenthewheel—loadandstress-freetemperatureattenuating．3．TOanalyzetherelationshipbetweentemperaturestresschangingandstress-freetemperatureattenuating．KeyWords：CWR，stress-freetemperature，attenuation，analyzeII目录第1章引言⋯⋯⋯⋯⋯．⋯⋯⋯⋯⋯⋯⋯⋯⋯．

7、11．1概述⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．2锁定轨温探索现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．21．2．1锁定轨温含义的深入分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．21．2．2锁定轨温衰减现象的由来⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．3第2章锁定轨温衰减资料统计分析⋯⋯⋯⋯⋯⋯⋯⋯42．1锁定轨温衰减现象实例描述⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．42．1．1施工胀轨现象⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．42．1．2长轨切割锯缝顶严现象⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯42．2锁定轨温衰减现场资料收集⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．52．3数据分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

8、⋯92．3．1数据分布分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．92．3．2按铺设