减振层刚度对减振型CRTSⅢ型板式无砟轨道振动响应影响-《高速铁路技术》

文章信息/Info

Title:: Impact of Stiffness of Damping Course on Vibration Response of Damping CRTSⅢ Slab Ballastless Track

作者:: 秦佳良; 谢毅; 周冠南; 周涛; 王建立; 刘林芽; 李秋义; 1. 华东交通大学, 南昌 330013;
2. 中铁二院工程集团有限责任公司, 成都 610031;
3. 中国铁建大桥工程局集团有限公司, 天津 300300;
4. 中铁五局集团有限公司, 长沙 410007;

Author(s):: QIN Jialiang; XIE Yi; ZHOU Guannan; ZHOU Tao; WANG Jianli; LIU Linya; LI Qiuyi; 1. East China Jiaotong University, Nanchang 330013, China;
2. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China;
3. China Railway Construction Bridge Engineering Bureau Group Co., Ltd., Tianjin 300300, China;
4. China Railway Fifth Bureau Group Co., Ltd., Changsha 410007, China;

Keywords:: CRTSⅢ damping slab track|finite element method|stiffness of damping course|dynamic response

摘要:: 为了研究减振层刚度变化对减振型CRTSⅢ型板式无砟轨道振动的影响,本文根据车辆与路基上减振型CRTSⅢ板式无砟轨道结构相互作用的特点,基于有限元理论,提出了一种轨道单元和车辆单元,建立了列车-减振型CRTSⅢ板式无砟轨道耦合动力学时域分析模型,分析了减振层刚度变化对车体、钢轨、轨道板和底座板振动响应的影响。研究结果表明:(1)减振层刚度的变化对车体的振动影响较小,对钢轨、轨道板和底座板的振动影响较大;(2)随着减振层刚度的增大,削弱了板式轨道的弹性,减振层以上结构的振动不断减弱,下部结构的振动不断加剧;(3)同时考虑减振层上部和下部结构的动力效应,建议减振层刚度应在 400~700 kN/mm。

Abstract:: In order to study the impact of the change of the stiffness of the damping course on the vibration of the damping CRTSⅢ slab ballastless track, this paper proposes a track unit and a vehicle unit based on the finite element theory according to the interaction characteristics between the vehicle and the damping CRTSⅢ slab ballastless track structure on the subgrade, and establishes a dynamic time-domain analysis model of the coupling of train and the damping CRTSⅢ slab ballastless track. The impact of the change of the stiffness of the damping course on the vibration response of the vehicle, rail, track slab, and base plate is analyzed. The results show that: (1) The change of the stiffness of the damping course has little impact on the vibration of the vehicle, and has a great impact on the vibration of the rail, track slab, and base plate. (2) With the increase of the stiffness of the damping course, the elasticity of the slab track is weakened, the vibration of the structure above the damping course is continuously weakened, and the vibration of the substructure is continuously intensified. (3) Considering the dynamic effect of the super and sub structures of the damping course, it is recommended that the stiffness of the damping course shall be 400 to 700 kN/mm.