东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (7): 1056-1060.DOI: 10.12068/j.issn.1005-3026.2015.07.031

• 资源与土木工程 • 上一篇    下一篇

轨道参数对无砟轨道振动特性的影响分析

石文博, 缪林昌, 王正兴, 骆俊晖   

  1. (东南大学 交通学院, 江苏 南京210018)
  • 收稿日期:2013-12-17 修回日期:2013-12-17 出版日期:2015-07-15 发布日期:2015-07-15
  • 通讯作者: 石文博
  • 作者简介:石文博(1988-),男,河南许昌人,东南大学博士研究生; 缪林昌(1963-),男,江苏泰州人,东南大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51278099).

Influence of the Track Parameters on Vibration Characteristics of Ballastless Track

SHI Wen-bo, MIAO Lin-chang, WANG Zheng-xing, LUO Jun-hui   

  1. 1. School of Transportation, Southeast University, Nanjing 210018, China.
  • Received:2013-12-17 Revised:2013-12-17 Online:2015-07-15 Published:2015-07-15
  • Contact: MIAO Lin-chang
  • About author:-
  • Supported by:
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摘要: 依据弹性支撑块式无砟轨道的力学特征,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钢轨和轨枕的竖向振动加速随时间的变化过程,结合快速傅里叶变化的方法,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.结果显示,增加各垫层的刚度和阻尼都能直接导致系统振动能量的减少,其中增加刚度导致振动能量减少的幅度要大.

关键词: 无砟轨道, 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 ballastless track with elastic supporting block 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-dependent acceleration was verified by the fast Fourier transform algorithm. A vibration power 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 result shows the vibration energy is reduced with the increase of the stiffness and damp, meanwhile, the decrease in amplitude of the vibration energy that is resultant from the increase of the system stiffness is more prominent.

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

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