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中文摘要：
基于车辆-轨道耦合动力学理论，提出了一种研究列车引起地面振动的数值方法。将车辆简化为用弹簧阻尼元件连接的多刚体系统，轨道用组合有限梁单元划分，地基计算域内用三维六面体有限单元划分，计算域边界的阻抗和散射特性由三维粘弹性动力人工边界模拟。假定8节车辆编组的列车以200km／h的速度运行，用所提方法对其产生的地面振动特征进行了仿真分析；通过和已有研究结果的对比说明，该方法的计算结果和解析方法的计算结果吻合，能对列车引起的地面振动进行初步预测。
英文摘要：
Based on the vehicle-track coupling dynamic theory, a numerical method is developed to simulate the train induced ground vibration. The considered vehicle is modeled as multi-body dynamic system including the suspension springs and dampers. The track is meshed by a composite beam finite element. The three-dimensional hexahedron finite element is used to mesh the calculation domain of the ground. Impedance and scattering characteristics of the calculation domain edges are simulated by three-dimensional visco-elastic artificial boundary. Simulation are performed for the ground vibration generated by the train with a composition of eight cars running at the speed of 200 km/h. Comparisons of this work and existing studies indicate that the result of numerical method agrees well with that of analytical method, and the preliminary prediction of the train induced ground vibration can be implemented by using of the numerical method.
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