摘 要：对于气动与弹性的耦合模型，给出气动力的频域公式，并表示成有理多项式，通过等价的变换，能够推导出与结构动力学方程完全相似的、关于求解变量的二阶常微分方程组。于是，可以在计算结构动力学框架下实现气动弹性问题的分析和计算。此方法将通用计算结构动力学程序的功能与试验或数值分析得到的气动力模型相结合，简化了气动弹性的耦合分析、提高计算效率。

Abstract: To simplify the aeroelastic analysis by utilizing the general CSD program, an approach to transform the aerodynamic to the desired formation is presented in this paper. For a flow-flexible structure coupling model, the aerodynamic is given in the frequency-domain formula, and then can be expressed as rational polynomials. Through the equivalent transformation, the aerodynamic can be deduced to a second order ordinary differential equation. Then aeroelastic analysis can be achieved under the framework of computational structural dynamics. This approach combined the general CSD program and aerodynamic model, which is derived from numerical analysis or experiment, to simplify the aeroelastic analysis and improve computational efficiency.