基于计算流体动力学(CFD)方法,利用自有程序结合商业软件处理大跨桥梁风致振动中的流体-固体耦合问题,使用三维桥梁结构模型,进行大跨桥梁风致振动的数值仿真。仿真结果符合实际物理现象,并且所得到的结构气动参数同已有仿真方法的数值结果相比,与风洞试验结果更加接近。这些数值仿真表明,该计算流体动力学方法可以比较准确地进行大跨桥梁的气动特性分析,可以为大跨桥梁建设提供重要的设计基础。 Based on Computational Fluid Dynamics (CFD) method, the fluid-solid coupling problem of wind-induced vibration of long-span bridges is dealt with by its own program combined with commercial software. The three-dimensional bridge structure model is used to simulate wind-induced vibration of long-span bridges. The simulation results are in line with the actual physical phenomena and the aerodynamic parameters of the structure obtained are closer to the wind tunnel test results than the numerical results of the existing simulation methods. These numerical simulations show that the CFD method can accurately analyze aerodynamic characteristics of long-span bridges and provide an important design basis for the construction of long-span bridges.