不同桥型上梯形轨枕轨道动力特性与减振性能分析-(5409)

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1、ABSTRACTABSTRACT：WiththeexpansionofcityscaleandtheiIlcI℃勰eofpopulation，thedevelopmentofurbanrailtransitisespeciallyrapidly,andurbanrailtransitnoiseandvibrationproblemshavebecomeincreasinglyprominent．舢anewtypeofhighdamping仃aCkstructure，theladdersleepertrackisbeingmoreandmorewidelyusedinou

2、rcountryinrecentyears．Butbecauseofthecharacteristicsofurbanrailtransit，mostofthemareappliedintheundergroundcircuit，Rarelyusedontheviaduct．Moreover,thestudyonthedampingeffectofladdertrackontheelevatedlineisstillsignificantscarcity．Inordertosolvealltheseproblems，inthispaperwehaveestablishe

3、dtwokilldofthevehicle-track-bridgecoupled3-Ddynamicanalysismodelofladdertracksystem--ladder的cksystemonboxgrider,laddertrackontroughgriderinconsiderationofitsdifferentperformanceondifferentbridge．Bythedynamicfirfitedementanalysis，wehavestudiedthedynamiccharacteristicsandvibrationreduction

4、performanceofladdertracksystemappliedindifferenttypesofbridges，andmadethequantitativeanalysisoftheVibrationreductioneffectbymeansofthecommonlydampingperformanceevaluationmethods．Bytheresearch，weconcludethattheladder仃ackwillnotchangethedynamicperformanceofvehicleandtracksystemwhenusedonth

5、eelevatedlinecomparedwiththeimegratedbed．theZvibrationlevelinsertionlossisapproximately9dBwhentheladdertrackusedontheboxgriderandtroughgrider．KEYWORDS：Laddertrack；Bridge；Dynamicfiniteelementmodel；Dynamiccharacteristics；VibrationreductioneffectCI．ASSNO：17213目录中文摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

6、⋯⋯⋯vABSTRACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．vii第1章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．I．引言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯I1．2．我国轨道交通减振设施及其发展⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．2．I．轨下减振⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．2．枕下减振⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．61．3．各减振措施的应用分析对比⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．111．3．1．轨下减振⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯111．3．2．枕下减

7、振⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯II1．4．本文研究目的及研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．121．4．1．研究目的⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯121．4．2．梯形轨枕轨道的国内外研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯131．5本文拟研究的内容及方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯161．5．1论文研究内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．161．5．2论文研究方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯17第2章车辆．轨道．桥梁系统耦合分析方法及模型⋯⋯⋯⋯⋯⋯⋯⋯⋯．．192．1基于梯形轨枕的车辆．轨道．