【作者】 丁德云； 刘维宁； 翟辉；

【Author】 Ding Deyun, Liu Weining, Zhai Hui(School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044 )

【机构】 北京交通大学土木建筑工程学院；

【摘要】 轨道交通引起的环境振动问题越来越受到人们的重视,特别是低频振动对于精密仪器、高技术生产设备等的影响。而目前关于低频振动的研究成果很少。本文针对地铁列车运营期间的振动,在分析其特点的基础上,结合轨道-衬砌-土层共同作用的原理,采用PLAXIS二维有限元动力数值模型,分别模拟计算了不同频率(1-10 Hz)简谐荷载、不同隧道埋深、不同衬砌型式下距线路中心不同地表拾振点的低频响应,得到了低频响应的传播规律;并建立了低频振动响应的“多参数回归模型”,给出了低频振动量的一般表达式。更多还原

【Abstract】 Environmental vibrations from urban mass transit are becoming a special concern; especially, the low - frequency vibrations can give effects to the sensitive equipments and high - tech production facilities. However, the research on the low- frequency vibrations is limited at present. Based on analyzing the characters of metro train induced vibrations and the principle of track - lining - soil interaction, the author simulates several conditions which include different frequency (1-10Hz) harmonic loading, covering depth and lining format by PLAXIS 2 - dementional finite element dynamic model. The low - frequency responses of some ground surface points which are different distance away from the centerline are obtained, and some propagation rules are summed up. Furthermore, a "multi- parameter regression model" on the ground low - frequency response is put forward, and the level of low - frequency response is expressed by a general formulation.更多还原