地铁振源-传播路径协同控制全频段环境振动方法研究

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关键词：地铁；浮置板轨道；局域共振型排桩；综合减隔振；带隙 中图分类号：TB535；TU473 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202401008

Abstract：Steel spring floating slabtracksareequipped to reducethe vibrationimpactonprecision instrumentsalong the metro lines，butthegroundvibration wouldbeamplifedatthenaturalfrequencyofthetracks.Inordertoaddresthenegativeipactof natural frequencyvibrationamplificationonthesurroundingenvironmentoffloatingslabtrack，ful frequencycontrolmethodcon sideringfrequencymatchingforenvironmentalvibrationincollborationwithmetrovibrationsourcesandpropagationpathsispro posed，whichisbasedonthetheoryofperiodicstructurebandgapstructure.Theefectivenessofthis methodisanalyzd byestablishingathre-dimensional metrotrain-floatingslabtrackcouplingmodelandafiniteelementanalysismodeloftrackbed-tunelsoilrowpiles.Theresearchresultsshowthattheground vibrationcanbereducedabout4～7dBatthenaturalfrequencyof the floating slab track plateby adjusting the band gap range of periodic pile to 7～9Hz ，eliminating the adverse effectof vibration amplificationathenaturalfrequencyof tetrack.Comparedtoordinary tracks，theenvironmentalvibrationcomprehensivecontrolmeth odproposedinthisarticlehasgoodvibrationcontrolefectsandcanefectivelyreducethevibrationlevelofsensitivepointsonthe ground in the full frequency range.

Keywords： metro； floating slab track；local resonance row piles；comprehensive vibration isolation； band gap

城市轨道交通的迅猛发展与精密仪器的规模化应用是中国目前经济社会快速发展的重要标志。（剩余12962字）