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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >2.5D coupled FEM-SBFEM analysis of ground vibrations induced by train movement
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2.5D coupled FEM-SBFEM analysis of ground vibrations induced by train movement

机译：2.5D耦合FEM-SBFEM分析列车运动引起的地面振动

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摘要

2.5D models are efficient tools for dynamic analysis of structures that are longitudinally invariant. In this work, a two-and-a-half dimensional (2.5D) coupled finite element method-scaled boundary finite-element method (FEM-SBFEM) is utilized to study the induced ground vibration of passing trains. By applying Fourier transformation in the longitudinal direction, the SBFE equations in the frequency-wave number domain is presented. The unbounded domain is simulated by SBFEM. The coupling with the 2.5D FEM is straightforward. The bounded domain is modelled by FEM and the track with the use of Euler Bernoulli beam. A number of available analytical solution results are used to verify accuracy of proposed methods in both time and frequency domains. The results were in good agreement with the analytical solution. The effect of speed of the moving load on the ground response is shown. Also 2.5D FEM-SBFEM is used in the analysis of underground train-induced ground vibrations. 2.5D results are in reasonable agreement with 3D results.
机译：2.5D模型是用于动态分析纵向不变结构的有效工具。在这项工作中，采用二维半（2.5D）耦合有限元方法-标度边界有限元方法（FEM-SBFEM）来研究经过列车的地面振动。通过沿纵向进行傅立叶变换，给出了频率波数域的SBFE方程。无边界域由SBFEM模拟。与2.5D FEM的耦合非常简单。有限域通过有限元法和轨道使用Euler Bernoulli梁建模。许多可用的分析解决方案结果用于在时域和频域中验证所提出方法的准确性。结果与分析解决方案非常吻合。显示了移动负载的速度对地面响应的影响。 2.5D FEM-SBFEM也用于分析地下火车引起的地面振动。 2.5D结果与3D结果具有合理的一致性。

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