轨道参数对弹性支承块式无碴轨道振动特性的影响分析

摘要/Abstract

摘要： 依据弹性支承块式无碴轨道的力学特征，以及地铁车辆的实际参数，建立了轮轨非线性耦合系统模型。通过对该模型的求解可以得到系统中轨道和轨枕的竖向振动加速随时间的变化过程，结合快速傅立叶变化的方法，分析了钢轨和轨枕振动加速度在频域中的变化。引入根据人体敏感度进行修正后得到的振动能量指标，对钢轨以及轨枕的振动能量进行量化分析，评价了系统中各个参数对于系统振动特性的影响，得到的结果能够对于地铁在设计和施工做减振评价有一定的指导作用。

关键词: 无碴轨道, 减振, 轮轨耦合模型, 振动能量指标, 模态法

Abstract: A nonlinear coupling model of wheel and rail was established according to the mechanical characteristic of elastic supporting block ballastless track and the actual parameters of metro vehicle. The time-variant vertical acceleration of the rail and the sleepers can be calculated from the model, and the frequency dependence acceleration was verified by the Fast Fourier Transform algorithm. A vibration level fixed by human sensitivity was introduced to quantify the vibration energy of the rail and sleepers. The impact of the parameters in the model was evaluated. The results provide certain guidance to vibration reduction of the tunnel during the design and construction.

Key words: ballastless track, vibration reduction, wheel-rail couple model, vibration power, modal method

石文博缪林昌. 轨道参数对弹性支承块式无碴轨道振动特性的影响分析[J]. .

参考文献

[1] 唐益群，赵化，王元东，等. 地铁荷载下隧道周围加固软黏土应变累积特性[J]. 同济大学学报(自然科学版). 2011, 39(7): 972-977.（Tang Y, Zhao H, Wang Y, et al. Characteristics of strain accumulation of reinforced soft clay around tunnel under subway vibration loading[J]. Journal of Tongji University. Natural Science, 2011, 39(7): 972-977.）；
[2] Caughey T K, O'Kelly M E. Effect of damping on the natural frequencies of linear dynamic systems[J]. Journal of the Acoustical Society of America. 1961, 33(11): 1458-1461；
[3] Garvey S D, Friswell M I, Prells U. Co-ordinate transformations for second order systems. Part I: General transformations[J]. Journal of Sound and Vibration. 2002, 258(5): 885-909；
[4] Grassie S L, Gregory R W, Harrison D, et al. THE DYNAMIC-RESPONSE OF RAILWAY TRACK TO HIGH-FREQUENCY VERTICAL EXCITATION[J]. JOURNAL OF MECHANICAL ENGINEERING SCIENCE. 1982, 24(2): 77-90.
[5] Zhai W, Wang K, Cai C. Fundamentals of vehicle-track coupled dynamics[J]. Vehicle System Dynamics. 2009, 47(11): 1349-1376.
[6] Lei X, Noda N A. Analyses of dynamic response of vehicle and track coupling system with random irregularity of track vertical profile[J]. Journal of Sound and Vibration. 2002, 258(1): 147-165.
[7] Kouroussis G, Conti C, Verlinden O. A numerical analysis of the influence of tram characteristics and rail profile on railway traffic ground-borne noise and vibration in the Brussels Region[J]. 2013.
[8] 佐佐博明（邹振民译）. 日本新干线轨道及其维修[J]. 中国铁路. (12): 42-46.
[9] 辛学忠. 德国铁路无碴轨道技术分析及建议[J]. 铁道标准设计. 2005(02): 1-6.（Xin Xuezhong. Technical Analysis of Ballastless Track of DB and Proposals Science and Technology Dept., Ministry of Railways. 2005(02): 1-6.）
[10] Newton S G, Clark R A. An investigation into the dynamic effects on the track of wheelflats on railway vehicles[J]. Journal of Mechanical Engineering Science. 1979, 21(4): 287-297.
[11] Timoshenko S. Vibration Problems in Engineering[M]. 4th ed ed. John Wiley&Sons, 1974.
[12] 朱石坚，楼京俊，何其伟. 振动理论与隔振技术[M]. 国防工业出版社, 2006.
[13] Shen Z Y, Hedrick J K, Elkins J A. A comparison of alternative creep force models for rail vehicle dynamic analysis[J]. Vehicle System Dynamics. 1983, 12(1-3): 79-83.
[14] Zhai W M. Two simple fast integration methods for large-scale dynamic problems in engineering[J]. International Journal for Numerical Methods in Engineering. 1996, 39(24): 4199-4214.
[15] International Standard. Mechanical vibration and shock evaluation of human exposure to whole-body vibration. ISO 2631-1,1997,5,1