地铁列车引起的大地振动传播规律研究

建立列车一轨道连续弹性双层梁平面模型，模拟地铁列车运行时引起的轨道结构振动，采用快速傅里叶变换法并结合Matlab软件编制程序，求出作用在隧道基底的荷载值，在此基础上，建立“隧道一土层”三维有限元模型，计算并分析了不同列车速度、不同隧道埋深等工况组合下地铁列车引起的大地振动传播规律。

Study on propagation of ground vibration induced by metro train

The vibration of track structure caused by the running of certain metro train was simulated by using a continuous elastic double layers beam of track structure. Through using Fourier change method and mathematicalsoftware-MATLAB, the forces on tunnel floor produced by subway train were calculated. On the basis of the model, numerical model of tunnel-soil was established. The vibration characteristics of ground surface with different train speeds and different tunnel depths were obtained.