Analysis of Ground Vibration Induced by High-Speed Train
Analysis of Ground Vibration Induced by High-Speed Train
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发表时间：
2007
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影响因子：
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通讯作者：
S. Gang
中科院分区：
文献类型：
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作者：
S. Gang
轨枕与地面之间的力由轨道的挠度曲线导出。轨道被建模为弹性基础上的梁。通过薄层法（TLM）得到层状半空间的格林函数，并检验了移动列车-轨道-环境的振动模型。基于秦沉铁路实测数据，分析了轨道的垂直地面振动。通过轨道通过过程中的现场振动测量验证了理论结果。秦沉轨道上的咸丰高铁列车。验证表明，加速度谱在基轴通过频率处达到最大值。当列车速度低于表层瑞利波速时，加速度对列车速度的依赖性较弱。当列车速度达到瑞利波速时，出现振动。近场振动得到了很好的预测。
The force between the sleeper and the ground is derived from the deflection curved of track.The track is modeled as a beam on an elastic foundation.The Green's function of a layered halfspace is obtained by the thin layer method(TLM) and the vibration model of moving train-track-environment is examined.Based on the measured data of the Qin-Shen rail line,the vertical ground vibrations from the track are analyzed.The theoretical results are validated by means of in-situ vibration measurements during the passage of a Xian-Feng high-speed train on the track of Qin-Shen.The validation indicates that the acceleration spectrum reaches the maximum at the fundamental axle passage frequency.The acceleration depends weakly on the train speed when it is lower than the Rayleigh wave velocity of the surface layer.A vibration boom is found when the train speed reaches the Rayleigh wave velocity.The vibration is well predicated in the near field.