摘要
在地铁隧道附近,对于环境振动要求较高的特殊建筑物和精密仪器,地铁列车通过时引起的环境振动影响不容忽视。基于动力反应分析理论,通过建立有限元模型,模拟分析了某地铁开通后将对附近建筑可能造成的振动影响,同时对波阻块的减振性能进行了分析。分析结果表明,在地铁列车运行引起的建筑物环境振动中,竖向振动在幅值上与水平振动相当,10 Hz以上的振动是环境振动隔振减振的主要对象。波阻块具有良好的减振效果,其减振效果随波阻块厚度的增大而增大。
Nearby a subway tunnel,the vibration impact induced by subway on precise instruments and special buildings can not be ignored,because they are sensitive to the environmental vibration.In this paper,based on the dynamic response analysis theory,a finite element model for special buildings is established,and the impact of train on environment vibration of the buildings is stimulated.Meanwhile,the vibration reduction effect of WIB is analyzed.The results show that,the horizontal vibration level is almost the same as the vertical one,the vibration above 10 Hz is the main object in environmental vibration isolation.WIB has a good vibration reduction effectiveness which is more obviously observed when the thickness of WIB increases.
出处
《城市轨道交通研究》
北大核心
2010年第8期54-58,共5页
Urban Mass Transit
关键词
地铁
波阻块
减振处理
数值分析
subway
wave impedance block（WIB）
vibration countermeasures
numerical analysis
