不同类型装配式钢弹簧浮置板减振效果分析  

Analysis on the vibration reduction effect of different types of prefabricated steel spring floating slabs

作　　者：任娟娟[1,2] 梁捷 屈昌衡 李辰 章恺尧 刘锦辉 赵华卫 REN Juanjuan;LIANG Jie;QU Changheng;LI Chen;ZHANG Kaiyao;LIU Jinhui;ZHAO Huawei(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031,China;Shenzhen Metro Group Co.,Ltd.,Shenzhen 518000,China;China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]西南交通大学轨道交通运载系统全国重点实验室,成都610031 [3]深圳市地铁集团有限公司,广东深圳518000 [4]中国铁路设计集团有限公司,天津300308

出　　处：《振动与冲击》2024年第22期270-278,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(52425213,52278461);博士后创新人才支持计划(BX20230298);中国铁设科技开发计划项目(2023A0223804)。

摘　　要：为研究不同钢弹簧数量和钢弹簧刚度参数下装配式钢弹簧浮置板轨道的减振效果,且便于运输吊装,提出了三种类型装配式钢弹簧浮置板轨道。通过建立车辆-轨道-隧道耦合动力学模型对比分析了钢弹簧浮置板轨道的动力性能和减振效果,并在深圳地铁某号线路选取对应类型装配式钢弹簧浮置板结构断面和整体道床断面进行现场测试与仿真结果进行对比验证。研究结果表明:钢弹簧浮置板轨道与整体道床相比,钢轨和浮置板的垂向位移增加了57.23%~95.00%,垂向加速度减小了19.93%~60.13%;钢弹簧浮置板在16~200 Hz内的减振效果明显,最大减振效果可达16.61 dB;钢弹簧浮置板轨道均出现了道床的固有频率向低频偏移和浮置板的隧道壁振动加速度级超过整体道床的现象;三种类型装配式钢弹簧浮置板轨道的减振效果为:类型A>类型B>类型C,其中类型A的减振效果最好;仿真数据与现场实测数据误差率为1.43%~14.25%,减振效果误差在0~1 dB内。To study the vibration reduction effect of prefabricated steel spring floating slab tracks under different numbers and stiffness parameters of steel springs,and to facilitate transportation and lifting,three types of prefabricated steel spring floating slab tracks were proposed.The dynamic performance and vibration reduction effect of the steel spring floating slab tracks were compared and analyzed by establishing a vehicle-track-tunnel coupling dynamic model.Field tests and simulations were conducted to compare and verify the vibration reduction effects of different types of prefabricated steel spring floating slab track structures and monolithic track bed sections on a certain metro line in Shenzhen.The research results show that compared with the monolithic track bed,the vertical displacement of the steel rail and floating slab increases by 57.23%-95.00%,and the vertical acceleration decreases by 19.93%-60.13%.The vibration reduction effect of the steel spring floating slab is significant in the range of 16-200 Hz,with a maximum vibration reduction effect of 16.61 dB.The natural frequency of the monolithic track bed has shifted towards low frequencies and the vibration acceleration level of the tunnel wall of the steel spring floating slab track exceeds that of the monolithic track bed.The vibration reduction effects of the three types of prefabricated steel spring floating slab tracks is:Type A> Type B> Type C,with Type A having the best vibration reduction effect.The error rate between simulation data and on-site measured data is 1.43%-14.25%,and the vibration reduction effect error is within the range of 0-1 dB.

关 键 词：装配式钢弹簧浮置板 振动 现场试验 车辆-轨道-隧道耦合动力学模型 

分 类 号：U231[交通运输工程—道路与铁道工程] U213.2