浮置板轨道结构的复能带模型分析与弹性波调控

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关键词：钢弹簧浮置板轨道结构；复能带；周期结构；模型分析；动力吸振器 中图分类号：U211.3 文献标志码：A DOI:10.16385/j.cnki.issn.1004-4523.202403063

Complex band model analysis and elastic wave control of floating slab track structure

GUOWenjie,ZHAIYuliu,LUOWenjun,ZHANGPengfei,YANJianwei (State Key Laboratory of Performance Monitoring and Protecting ofRail Transit Infrastructure, EastChinaJiaotongUniversity，Nanchang33oo13，China）

Abstract:Inoertvestigatetepropagtioofelasticesintespltigsabtacktructue，metdforolig thecomplexbandoftheSSFSTisproposedbasedontheprincipleofenergyfuctionalandtevirtualspringmodelTeSFSTiscosidered astwomodels:tistontreatsbothteailandthefloatingslabsTimoshenkobastructures；thscondistosiderthiladte floatingslabasTimosenkobamandMindinplatestructures.Theproposedmetodisutiedtofdouttheircomplexbndcharacteristics， andtheappicationscopeofthesetwomodelsisinvestigatedusingthefiniteelementsolidmodelasthestandardBuildingonthis，the influencemechansmsofstfessfrequencyvarationdamping，nddynaicvibrationabsorberonwavepropagationandateuationwin thetrackstructureareevealed.Resultsidicatethattebeambeammodelcanreflecttheateuationfrequencybandoftetackstructure within 0～33Hz ，whereas the beam-slab model canaccuratelydepict the propagationandatenuationcharacteristicsof the SSFSTwithin 34～300Hz Thefrequency-dependent efectof thefastenerstifnessmakes theandcurve movetothelowfrequencyoverall.Increasingthe fastenerstiessdstlsngdmpiidetetivelupstepropgatioofasticwaswitcre Thedesignabilityofteworkingfrequenyofthedyamicvibatonabsorberallowsprecisecontroloflastcavepropagationaspecific frequenciesinthetrackstructure.Thestdycomparedandanalyzedthescopeofapplicationofferent modelsofteSFST，providinga theoretical foundation for the track structure modeling and facilitating precise control over track vibrations.

Keywords:steel-springfloatingslabtrackstructure;omplexband;periodicstructure;modelanalysis;dynamicvibrationabsorber

随着城市轨道交通系统的迅速发展，环境振动问题逐渐引起了公众的关注。（剩余28405字）