采用全三维精细建模方法，建立了轻轨车辆及大跨度双层斜拉桥的耦合振动分析有限元模型，模型考虑了几何和材料的非线性，单元与节点数超过百万。采用接触均衡的并行计算方法在上海超级计算机曙光4000A上进行求解，解决了模型较大带来的计算困难。通过对车辆单向运行及双向汇车运行两种工况的仿真，分析了斜拉桥组合梁桥面关键部位桁架节点受力状态，得出了主、边跨中桥面节段的动力响应特性。

Based on the refined threedimensional modeling method, a coupled vibration FEA(finite element analysis) model was established for light railway train and long span twolayer cablestayed bridge with the consideration of the material and geometry nonlinearity and over 2.2 million of element and nodes.To overcome the computing difficulty for large number of element, the solution was carried out with the Dawning 4000A supercomputer in Shanghai Supercomputer Center based on Contact Balance Bisection Algorithm for parallel computing.Through the simulation of one way and two way conditions, the key component's stress of cablestayed bridge girders and dynamic response of middle span section was respectively analyzed.

国家自然科学基金项目(60174023)；教育部博士点基金项目(20070248110)