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随着我国高速铁路的兴建和铁路的第六次大面积提速,将车辆、轨道和路基视为一个相互作用的动力系统来研究是十分必要的。根据列车走行的实际情况,以轮轨耦合接触关系为纽带,利用ABAQUS有限元分析软件,建立了包括车辆、板式轨道结构和路基的三维耦合动力有限元模型。通过改变模型参数(如CA砂浆层厚度、基床刚度、路基高度),分析了路基系统的动力响应变化规律,为高速铁路路基建设和参数设计提供了一些参考。
With the construction of China’s high-speed railway and the sixth large-scale speed-up of the railway, it is necessary to study the vehicles, tracks and subgrade as an interactive dynamic system. According to the actual situation of the train running, a three-dimensional coupled dynamic finite element model including vehicle, slab track structure and subgrade is established by using the wheel-rail coupling relationship as a link. The ABAQUS finite element analysis software is used. By changing the model parameters (such as the thickness of CA mortar, the bed stiffness and the height of subgrade), the variation of dynamic response of subgrade system is analyzed, which provides some references for the construction and parameter design of high speed railway subgrade.