对于气动弹性问题,在跨音速和大变形情况下,模态叠加法失效,为此需要探讨全场求解耦合方程的新方法。利用耦合计算流体动力学和计算结构动力学(CFD/CSD)方法,数值模拟了机翼的气弹响应问题。气动力的求解采用三维Navier-Stokes方程的有限体积法,实现了一种多块结构网格的动网格方法生成气动网格,采用有限元方法计算应力和结构变形。设计了CFD/CSD耦合计算的数据交换的方式,采用CFD/CSD弱耦合技术发展了一种CFD/CSD耦合计算方法,并对三维机翼的静气动弹性进行了数值模拟。结果表明:这种耦合方法求解气动弹性问题是实用的,可以应用于实际的工程设计。 For aeroelastic problems, the modal superposition method fails under transonic conditions and large deformation. Therefore, a new method to solve the coupled equations in the whole field is needed. The coupled aerodynamic and computational structural dynamics (CFD / CSD) methods are used to numerically simulate the aeroelastic response of the wing. The aerodynamic solution uses the finite volume method of three-dimensional Navier-Stokes equations to realize the dynamic mesh generation of a multi-block structure mesh to generate the aerodynamic mesh. The finite element method is used to calculate the stress and structural deformation. The way of CFD / CSD coupling data exchange was designed. CFD / CSD coupling technique was used to develop a CFD / CSD coupling calculation method. The static aerodynamic elasticity of 3D wing was numerically simulated. The results show that this method of coupling is a practical solution to the problem of aeroelasticity and can be applied to practical engineering design.