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中文摘要：
CFD技术为带有气动力非线性的气动弹性分析提供了一种研究途径，但是基于CFD的气动弹性直接数值模拟方法的计算量很大，不便开展定性分析和参数设计。基于CFD的非定常气动力模型的降阶技术为缓解计算效率与计算精度之间的矛盾以及系统的复杂性与易分析、易设计性之间的矛盾提供了行之有效的技术途径。综述了近年来发展的两类基于CFD技术的非定常气动力降阶技术和一种非线性气动力的谐波平衡方法，以及这些方法在非线性气动弹性研究中的运用．对比了各种方法的优越性并作了进一步的展望。
英文摘要：
CFD technique can be used to study aeroelastic problems with aerodynamic non-linearity. The disadvantage of the CFD based aeroelastic direct simulation is the high computational cost which prevents it to be used for qualitative analysis or parametric design. CFD based ROM （reduced order model） technique can solve the contradiction between computational efficiency and computational quality, and the contradiction between complexity and convenience for analysis and design. A review on two kinds of ROM and harmonic balance for nonlinear unsteady aerodynamics is made in this paper. Recent aeroelastic researches based on these methods are summarized. The advantages of these methods are compared and the future development is discussed.
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