使用模态法构造结构模型,研究了在时域内耦合结构模型和气动模型预测三维翼颤振的方法;求解N-S方程计算非定常气动力。Newmark算法简化颤振方程。采用无限平面插值方法耦合结构网格和气动网格;使用弹性系数算法和局部网格重构法重构非结构气动网格,以确保结构方程和气动方程进行耦合求解。AGARD445.6翼算例检验了计算方法的可行性。 Using the modal method to construct the structural model, the coupling structural model and the aerodynamic model are used to predict the three-dimensional flutter in the time domain. The unsteady aerodynamic force is calculated by solving the N-S equation. Newmark algorithm simplifies the flutter equation. The infinite-plane interpolation method is used to couple the structural grids and the aerodynamic grids. The non-structural aerodynamic grids are reconstructed by using the elastic coefficient algorithm and the local grid reconstruction method to ensure that the structural equation and the aerodynamic equation are coupled and solved. AGARD445.6 wing test to verify the feasibility of the calculation method.