地铁周期性轨道-隧道弯曲振动波传播特性研究  

Propagation Characteristics of Flexural Wave in Metro Periodic Track-tunnel Systems

作　　者：戴承欣 冯青松[2] 涂勤明 罗信伟 杨舟 周豪 DAI Chengxin;FENG Qingsong;TU Qinming;LUO Xinwei;YANG Zhou;ZHOU Hao(Guangzhou Metro Design and Research Institute Co.,Ltd.,Guangzhou 510010,China;State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广州510010 [2]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,南昌330013

出　　处：《噪声与振动控制》2024年第6期23-28,110,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(52178423,52068029,51878277);江西省主要学科学术和技术带头人培养计划资助项目(20194BCJ22008);江西省重点研发计划资助项目(20192BBE50008)。

摘　　要：为探究地铁振源系统中弯曲振动波传播特性,将轨道-隧道模拟为Timoshenko梁-Timoshenko梁-Flügge复合双层圆柱薄壳耦合系统,并基于能量法和周期结构理论对其弯曲波带隙特性和振动响应特性开展分析。研究结果表明:在0~300 Hz范围内,耦合系统仅存在一条弯曲波带隙——0~46.4 Hz,为局域共振带隙,且主要受隧道质量和土体刚度影响;钢轨、道床板和隧道的振动导纳函数峰值依次为212、188和46 Hz,分别对应于钢轨-扣件子系统、道床板-等效支撑子系统及隧道-土体子系统的第一阶共振频率;钢轨、道床板和隧道的振动衰减区依次为0~142 Hz、0~73Hz和0~46 Hz。相关研究结论可为今后地铁结构的精细化减振设计及减振装备开发提供新的思路和理论指导。In order to explore the propagation characteristics of flexural vibration waves in metro vibration source system,a Timoshenko beam-Timoshenko beam-Flügge coupled cylindrical shell model was established.The flexural wave band gap and vibration response of the metro periodic track-tunnel system were obtained by energy method and periodic structure theory.The results show that in the range of 0-300 Hz,the flexural wave band gap in the coupled system is 0-46.4 Hz,which is a local resonant band gap,and its width is mainly affected by the mass of the tunnel and the stiffness of the soil;the peak values of vibration admittance functions of rail,trackbed and tunnel are 212 Hz,188 and 46 Hz,respectively,corresponding to the first resonant frequencies of rail-fastener subsystem,trackbed-lower support subsystem and tunnel-soil subsystem;the vibration attenuation frequency bands of rail,trackbed and tunnel are respectively 0-142 Hz,0-73 Hz and 0-46 Hz.The relevant research conclusions may provide a new preview and theoretical guidance for refine vibration reduction design of metro track structure and the development of vibration reduction equipment.

关 键 词：振动与波 周期结构 地铁轨道-隧道结构 能量法 弯曲波带隙 振动响应 

分 类 号：U231[交通运输工程—道路与铁道工程]