Modelling train-induced vibration of structures using a mixed-frame-of-reference approach
Modelling train-induced vibration of structures using a mixed-frame-of-reference approach
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DOI：
10.1016/j.jsv.2020.115575
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发表时间：
2021-01
影响因子：
4.7
通讯作者：
P. Bučinskas;E. Ntotsios;D. Thompson;L. Andersen
中科院分区：
文献类型：
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作者：
P. Bučinskas;E. Ntotsios;D. Thompson;L. Andersen
介绍了一种新的环境振动预测计算建模方法。该模型采用运动参照系和固定参照系两种形式，并引入混合参照系的形式来耦合两种参照系。由此产生的系统能够模拟在无限铁路轨道上行驶的车辆，在移动的参照系中制定，通过土壤与固定参照系中制定的结构（即建筑物）相互作用。该方法采用半解析土模型，结构采用三维有限元模拟。提出了全系统的两种求解方法：部分耦合，即忽略反射波在土壤中传播的一些二次效应；完全耦合，即将车辆-轨道-土壤-结构建模为一个完全耦合系统。这两种方法都提供了在频率空间域中求解整个系统的一步方法。通过两个实例说明了该模型的用法：一个是分析铁路轨道附近的简单建筑结构，使用部分耦合求解程序；另一个是分析车辆模型穿过嵌入土壤中的刚性块的行为，使用完全耦合求解程序。所介绍的建模方法提供了一个计算效率高的求解过程，同时适用于广泛的应用案例。
A novel computational modelling approach for prediction of environmental vibration is introduced. The model is formulated in both moving and fixed frames of reference, with a mixed frame of reference formulation introduced to couple the two frames of reference. The resulting system is able to model a vehicle travelling on an infinite railway track, formulated in a moving frame of reference, interacting via the soil with a structure (i.e. building), formulated in a fixed frame of reference. The method utilizes a semi-analytical soil model with the structures modelled using three-dimensional finite elements. Two solution procedures of the full system are proposed: partial coupling, where some secondary effects from reflected waves propagating through soil are disregarded, and full coupling, where the vehicle–track–soil–structure is modelled as a fully coupled system. Both proposed solution procedures offer a one-step approach for solving the whole system in the frequency–spatial domain. The usage of the model is demonstrated in two example cases: one analysing a simple building structure near a railway track, using the partial coupling solution procedure, and another one analysing the behaviour of a vehicle model traversing over a rigid block embedded inside the soil, using the full coupling solution procedure. The introduced modelling approach offers a computationally efficient solution procedure, at the same time being applicable to a wide array of application cases.