【摘要】 基于单元中心点-节点联合插值方法，由径向基函数构造流体域与固体域非匹配网格间的数值传递表达，分析大型复杂结构的流固耦合；以某型高速列车头车车体为例，研究其在明线会车、单车通过隧道以及隧道会车3种不同工况下车体结构的动态响应，并与定值均布加载方法进行对比。研究结果表明：基于联合插值的流固耦合数据传递方法，可将整体相对误差控制在2.62%以下，比传统节点插值方法的最大相对误差(9.10%)要小；3种典型工况下，车体结构应力波动幅值由高到低分别为隧道会车、单车通过隧道和明线会车；虽然均布载荷工况最大应力水平较高，但无法考虑非对称载荷引起的交变应力。更多还原

【Abstract】 Using a combined elemental center-nodes interpolation method, the radial basis function(RBF) was used to conduct the data transfer for non-matching meshes between the fluid domain and the solid domain, and the fluid-structure interaction(FSI) on the large complex structure was studied. Taking the head car body of a highspeed train as an example, the dynamic responses of the body structure under three operation conditions: two trains intersecting, solo passing through a tunnel and two trains intersecting in a tunnel, were compared with that considering uniform loads referred to standards. The results illustrate that the global error is well controlled via combined interpolation method for FSI(the relative error is under 2.62%), which is obvious less than that obtained by using traditional nodal-based interpolation independently(the maximum relative error is 9.10%). The fluctuation of stress amplitudes in three conditions, from high to low, are two trains intersecting in a tunnel, solo passing through a tunnel and two trains intersecting, respectively. Regarding the uniform loading condition, the maximum stress value is higher than those calculated via FSI, but alternating stress induced by asymmetric load is insufficient to be considered in this case.更多还原