减振型双块式无砟轨道振动能量特性研究  

Study of Vibration Energy Properties of Double-block Ballastless Damping Track

作　　者：付娜 刘钰[2] 赵振航 李成辉[2] FU Na;LIU Yu;ZHAO Zhenhang;LI Chenghui(School of Civil Engineering,Architecture and Environment,Xihua University,Chengdu 610039,China;Key Laboratory of High-Speed Railway Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西华大学土木建筑与环境学院,四川成都610039 [2]西南交通大学高速铁路线路工程教育部重点实验室,四川成都610031

出　　处：《铁道学报》2018年第10期111-118,共8页Journal of the China Railway Society

基　　金：国家自然科学基金(51708459)

摘　　要：高速铁路无砟轨道中使用橡胶减振垫能有效减小环境振动,但会增强无砟轨道结构自身振动。本文建立车辆-轨道-桥梁耦合动力模型,采用功率流方法研究减振型双块式无砟轨道振动能量特性,探讨减振型轨道振动能量重分布问题,提出相应的功率流评价指标,对轨道结构振动进行评价。研究结果表明:设置减振垫将引起轨道结构振动能量重分布,使道床板的振动能量明显增加,造成振动能量在道床板上积聚,对道床板的正常使用性能不利。因此,对铁路轨道结构采取减振措施时,不仅需要以减小环境振动为目标,还应考虑轨道结构振动能量增加的不利影响。综合考虑减振垫刚度对桥梁振动和道床板振动能量的影响,建议减振垫刚度取值为40 MPa/m。The application of rubber damping pad in the ballastless track of high speed railways reduces the environmental vibration effectively but enlarges the track vibration to some extent.In this paper,a vehicle-track-bridge coupling dynamic model was established and the power flow method was used to study vibration energy properties of the double-block ballastless damping track and to discuss the redistribution of vibration energy in the track structure.Besides,the power flow indexes are proposed to evaluate the track vibration.The results show that the installation of the damping pad leads to the redistribution of vibration energy in the track structure,and obviously enlarges the vibration energy of slabs,resulting in the accumulating of the vibration energy in the track slab,which is unfavorable to the performance of the slabs.Thus,when selecting damping measures for track structure,it is necessary to reduce the vibration of the environment as well as to consider the adverse effects of the increase of the vibration energy of the track structure.Considering the influence of damping pad stiffness on bridge vibration and vibration energy of track slabs,the stiffness of the damping pad is suggested to be 40 MPa/m.

关 键 词：双块式无砟轨道 振动能量 功率流 能量重分布 

分 类 号：U213.244[交通运输工程—道路与铁道工程]