列车荷载下竖向非均匀地基波阻板主动隔振分析

高广运;陈功奇;张 博

振动与冲击 ›› 2013, Vol. 32 ›› Issue (22) : 57-62.

PDF(1996 KB)
PDF(1996 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (22) : 57-62.
论文

列车荷载下竖向非均匀地基波阻板主动隔振分析

  • 高广运,陈功奇,张 博

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Study on active vibration isolation using WIB in non-uniform ground under railway loadings

  • GAO Guang-yun,CHEN Gong-qi,ZHANG Bo

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摘要

对列车模型简化计算,基于薄层法研究波传播问题高效性与边界元法处理无限域问题精确性,建立薄层法基本解答作为格林函数边界元法。针对三维竖向非均匀地基模型,对WIB主动隔振体系进行参数研究。结果表明,在轨道交通荷载作用下,增加WIB剪切模量、厚度、宽度及选较小埋深均可增大WIB隔振体系隔振效果;非均匀系数对隔振效果略有影响。

Abstract

Thin-layered method (TLM) is very efficient to study the wave propagation in layered ground, and boundary element method (BEM) is very precise to solve infinite domain problems. This paper simplifies the track-ground substructure model, then combining the advantages of the above two methods, it presents 3D semi-analytical BEM based on TLM, on which the Green’s function is regarded as fundamental solution of a stratified half-space. Due to the vertical inhomogeneous ground, the effects of geometrical and material properties of the WIB were investigated in detail and the results show that increasing the shear modulus、thickness and width of WIB can improve the isolation effect under rail transit load. At the same time, relatively small embedment depth can give a satisfactory isolation effect.In addition, the foundation of the stratification parameter and the characteristics of non-uniform have a little influence on the vibration isolation effect of the WIB.


关键词

轨道交通 / 薄层法 / 半解析边界元法 / 竖向非均匀地基 / 波阻板

Key words

rail transit / thin-layered method / semi-analytical boundary element method / non-uniform ground / wave impeding block (WIB)

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导出引用
高广运;陈功奇;张 博. 列车荷载下竖向非均匀地基波阻板主动隔振分析[J]. 振动与冲击, 2013, 32(22): 57-62
GAO Guang-yun;CHEN Gong-qi;ZHANG Bo. Study on active vibration isolation using WIB in non-uniform ground under railway loadings [J]. Journal of Vibration and Shock, 2013, 32(22): 57-62

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