高速铁路桥上有砟-无砟轨道过渡段动力学研究

PDF(3424 KB)

振动与冲击 ›› 2015, Vol. 34 ›› Issue (9) : 76-81.

论文

基于京沪高速铁路特大桥上的有砟轨道与CRTS II型板式无砟轨道之间的过渡段实例，建立了车辆-轨道耦合动力学有限元计算模型，通过不同结构处理措施对有砟-无砟轨道过渡段动力学特性的影响研究，研究表明：当有砟轨道轨下胶垫刚度为55～75MN/m，无砟轨道轨下胶垫刚度为20～30MN/m时，有砟轨道的整体刚度大于无砟轨道；当有砟轨道轨下胶垫刚度为55～75MN/m，无砟轨道轨下胶垫刚度为40～50MN/m时，无砟轨道整体刚度与有砟轨道大体相当；过渡段枕、宽枕等不宜在有砟轨道刚度大于无砟轨道时使用；采用道砟胶结后提高了道床的整体性及过渡段轨道结构的稳定性，但增加了轨道刚度，应同时降低轨下胶垫刚度，以减小轮轨力；辅助轨只是增加了轨道结构的稳定性，对轨道刚度影响较小。

作者信息 +

DYNAMIC ANALYSIS OF BALLASTED-BALLASTLESS TRACK TRANSITION SECTION ON HIGH SPEED RAILWAY BRIDGE

Based on the project of transition section between ballasted track and CRTS II ballastless track on super large bridge of Beijing-Shanghai high-speed railway, the finite element model of vehicle-track coupling dynamics is established, and the influence of different structural measures on dynamic characteristics of the transition section are studied. The results show that overall stiffness of the ballasted track is greater than ballastless track when the under-rail pads stiffness of ballast track is 55~75MN/m and that of ballastless track is 20~30MN/m. The overall stiffness of ballasted and ballastless track are roughly identical when the rail pad stiffness of ballasted track is 55~75MN/m while that of ballastless track is 40~50MN/m. Transition sleeper and wide sleeper is unsuitable to be used in the transition section when ballast track stiffness is greater than ballastless track. The ballast glue improves the integrity of ballast bed and the stability of track structure in transition section but it also increases the track stiffness. In order to reduce the wheel-rail forces caused by the increased track stiffness, the rail pad stiffness has to be decreased. The auxiliary rails enhance the stability of track structure but it has little impact on the track stiffness.

Author information +

文章历史 +

摘要

基于京沪高速铁路特大桥上的有砟轨道与CRTS II型板式无砟轨道之间的过渡段实例，建立了车辆-轨道耦合动力学有限元计算模型，通过不同结构处理措施对有砟-无砟轨道过渡段动力学特性的影响研究，研究表明：当有砟轨道轨下胶垫刚度为55～75MN/m，无砟轨道轨下胶垫刚度为20～30MN/m时，有砟轨道的整体刚度大于无砟轨道；当有砟轨道轨下胶垫刚度为55～75MN/m，无砟轨道轨下胶垫刚度为40～50MN/m时，无砟轨道整体刚度与有砟轨道大体相当；过渡段枕、宽枕等不宜在有砟轨道刚度大于无砟轨道时使用；采用道砟胶结后提高了道床的整体性及过渡段轨道结构的稳定性，但增加了轨道刚度，应同时降低轨下胶垫刚度，以减小轮轨力；辅助轨只是增加了轨道结构的稳定性，对轨道刚度影响较小。

Abstract

Based on the project of transition section between ballasted track and CRTS II ballastless track on super large bridge of Beijing-Shanghai high-speed railway, the finite element model of vehicle-track coupling dynamics is established, and the influence of different structural measures on dynamic characteristics of the transition section are studied. The results show that overall stiffness of the ballasted track is greater than ballastless track when the under-rail pads stiffness of ballast track is 55~75MN/m and that of ballastless track is 20~30MN/m. The overall stiffness of ballasted and ballastless track are roughly identical when the rail pad stiffness of ballasted track is 55~75MN/m while that of ballastless track is 40~50MN/m. Transition sleeper and wide sleeper is unsuitable to be used in the transition section when ballast track stiffness is greater than ballastless track. The ballast glue improves the integrity of ballast bed and the stability of track structure in transition section but it also increases the track stiffness. In order to reduce the wheel-rail forces caused by the increased track stiffness, the rail pad stiffness has to be decreased. The auxiliary rails enhance the stability of track structure but it has little impact on the track stiffness.

导出引用

刘钰1，赵国堂2，亓伟1，陈攀1. 高速铁路桥上有砟-无砟轨道过渡段动力学研究[J]. 振动与冲击, 2015, 34(9): 76-81

LIU Yu，Zhao Guo-tang，QI Wei，CHEN Pan . DYNAMIC ANALYSIS OF BALLASTED-BALLASTLESS TRACK TRANSITION SECTION ON HIGH SPEED RAILWAY BRIDGE[J]. Journal of Vibration and Shock, 2015, 34(9): 76-81

参考文献

[1] Yu Liu, Guo-tang Zhao. Study on Reasonable Length of Ballasted-CRTS II Ballastless Track Transition Section on High-speed Railway Bridge[J]. Advanced Materials Research, Vols.671-674, 2013
[2] 陈果元, 魏丽敏, 杨果林. 胡家屯中桥路桥过渡段动力特性试验研究[J]. 振动与冲击, 2010, Vol.29(6):184-188.
Chen Guo-yuan, Wei Li-min, Yang Guo-lin. Experimental research on dynamic properties of road-bridge transition section of Hu jia tun medium bridge[J]. Journal of vibration and shock, 2006, 25(3):95-98.
[3] 陈雪华, 律文田, 王永和. 高速铁路路桥过渡段路基动响应特性研究[J]. 振动与冲击, 2006, Vol.25(3):95-98.
Chen Xuehua, Lü Wentian, Wang Yonghe. Study on the dynaimc response of high speed railway bridge-subgrade transition section[J]. Journal of vibration and shock, 2006, 25(3):95-98.
[4] 陈果元,杨果林,魏丽敏. 铁路客运专线路涵过渡段动力特性试验研究[J]. 铁道科学与工程学报, 2010,7(1):47-51.
Chen Guo-yuan, Yang Guo-lin, Wei Li-min. An experimental study of dynamical characteristic of road-culvert transitions in passenger-dedicated railway [J]. Journal of railway science and engineering, 2010, 7(1):47-51.
[5] 方宜, 李成辉. 有砟-无砟轨道过渡段动刚度研究[J]. 路基工程，2010,151(4): 2-25.
Fang Yi, Li Cheng-hui. Study on dynamic rigidity of ballasted-ballastless track transition section[J]. Subgrade Engineering, 2010, 151(4): 2-25.
[6] 徐红星. 高速铁路桥路过渡段动应力测试与分析[J]. 铁道工程学报, 2012, 167(8):1-5.
Xu Hong-xing. Test and analysis of dynamic stress of bridge - subgrade transition section of high - speed railway[J]. Journal of Railway Engineering Society, 2012, 167(8):1-5.
[7] 余泽西, 李成辉, 王小韬. 高速铁路线路过渡段动态不平顺研究[J]. 中国铁路, 2009, 4:55-57.
Yu Ze-xi, Li Cheng-hui, Wang Xiao-tao. The study on dynamic irregularity of transition section of high - speed railway[J]. Chinese Railways, 2009, 4:55-57.
[8] 雷晓燕. 轨道过渡段刚度突变对轨道振动的影响[J].中国铁道科学，2006, 27(5):42-45.
Lei Xiao-yan. Influences of track transition on track vibration due to the abrupt change of track rigidity[J]. China Railway Science，2006, 27(5):42-45.
[9] 雷晓燕.列车通过轨道不平顺和刚度突变时对轨道振动的影响[J]. 铁道科学与工程学报, 2005, 2(6):1-8.
Lei Xiao-yan. Influences of the train on track vibration when passing throughthe railway with irregularities and rigidity abrupt change[J]. Railway Computer Application, 2005, 2(6):1-8.
[10] 蔡成标. 无碴轨道动力学理论及应用[J]. 西南交通大学学报, 2007, 42(3):255~261.
Cai Cheng-biao. Dynamics of ballastless Track and its application [J]. Journal of Southwest Jiaotong University, 2007, 42(3):255-261