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首页> 外文期刊>Applied Mathematical Modelling >Three-dimensional vehicle-ballasted track-subgrade interaction: Model construction and numerical analysis
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Three-dimensional vehicle-ballasted track-subgrade interaction: Model construction and numerical analysis

机译：三维车辆镇流轨道路基交互：模型施工和数值分析

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摘要

In this work a three-dimensional vehicle-ballasted track-subgrade interaction model is developed, where the vehicle is modeled as a multi-rigid-body system, the track-subgrade interaction is modelled by finite element method (FEM) with the rail modelled as beam elements, the sleeper and the subgrade layers modelled as solid elements, and the vehicle and the track-subgrade system are coupled by unified matrix formulations and solved simultaneously and time-dependently. As the modelling advancement, the versatility for FEM construction of track-subgrade systems has been promoted, where the elemental scale can be arbitrarily chosen without consideration of the node-to-node matching principle as the conventional methods; besides the vehicle and the track-subgrade systems have been coupled effectively by wheel-rail contact models. The applicability of various wheel-rail contact models has been discussed, and to reveal the effectiveness of this model in solving engineering problems such as the soil elasticity unevenness and the contact break of "hanging sleepers", numerical examples have also been presented with referencable conclusions.
机译：在这项工作中，开发了一种三维车辆镇流轨道路基交互模型，其中车辆被建模为多刚体系统，通过有限元方法（FEM）用轨道模型建模轨道路基交互作为光束元件，卧式和作为固体元件建模的卧式层，以及车辆和轨道路基系统被统一的矩阵制剂耦合并同时和时间依赖地解决。作为建模进步，促进了用于跟踪路基系统的有限元结构的多功能性，其中可以任意选择元素刻度，而无需考虑节点到节点匹配原理作为传统方法;除了车辆和轨道路基系统之外，通过轮轨接触型号已经有效地耦合。已经讨论了各种轮轨接触型号的适用性，并揭示了这种模型在解决工程问题中的有效性，例如土壤弹性不均匀和“悬挂睡眠者”的接触破裂，也提出了参照结论的数值实例。

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