基于现场测试的列车引起地基振动分析

doi:10.13722/j.cnki.jrme.2015.03.018

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摘要对秦沈客运专线列车引起地基振动进行现场测试，通过对实测数据的时频分析，得到一个由轨道不平顺引起的基频。推导考虑轨道不平顺条件下列车动荷载的简化解析解，基于波数有限元理论推导动荷载作用下地基动力响应的柔度矩阵。以现场实测数据为依据，建立列车–轨道–地基振动模型，以推导的列车荷载为输入，计算轨道不平顺条件下列车运行引起的地基振动。分析不平顺幅值、波长以及车速对动态轮轨力的影响；研究层状地基上多轮荷载作用产生的动力响应，讨论车速变化对地基振动的影响。研究结果表明：所提出计算模型可以高效地预测轨道不平顺引起的地基振动；不平顺波长与列车运行速度一定时，轨道不平顺幅值越大，地基振动响应和轮轨作用力越大；不平顺幅值与列车运行速度一定时，不平顺波长越长，地基振动加速度和动态轮轨作用力越小；轨道不平顺波长与不平顺幅值一定时，车速越大振动加速度越大。

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关键词 ：土力学, 高速铁路, 轨道不平顺, 列车荷载, 2.5维有限元, 地面振动

Abstract：In order to analyze the ground vibration induced by the high-speed train，a simplified analytical solution of the moving train load considering the geometric irregularities of track was derived and the flexibility matrix was derived based on 2.5D finite element method. Then，using the load derived above as the input，a train-track-foundation model was established，and the influence of geometric irregularity on wheel/rail force was calculated. If the wavelength and speed were kept constant，the greater the amplitude was，the greater the ground vibration and the greater the wheel/rail force. If the amplitude and speed were kept constant，the longer the wave length was，the smaller the foundation vibration and the smaller the wheel/rail force. If the wavelength and amplitude were kept as constant，the greater the speed was，the more intense the vibration.

Key words： soil mechanics high-speed railway track geometric irregularities train load 2.5D finite element method ground vibration

收稿日期: 2014-04-11

引用本文:

陈功奇1，2. 基于现场测试的列车引起地基振动分析[J]. 岩石力学与工程学报, 2015, 34(03): 601-611.
CHEN Gongqi1，2. GROUND VIBRATION ANALYSIS INDUCED BY HIGH-SPEED TRAIN BASED ON IN-SITU DATA. , 2015, 34(03): 601-611.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.03.018 或 http://www.rockmech.org/CN/Y2015/V34/I03/601

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