中文摘要：

该文通过适当简化推导了采用模型表面波动压力的形式来描述的颤振导数，基于流固松耦合的计算策略，利用现有流体软件的用户自定义（UDF）功能，应用数值方法分析了模型表面波动压力分布特性对颤振导数的影响。从细观层面上阐述了颤振导数对模型振动的影响及其气动耦合现象。该文研究表明颤振导数的气动耦合现象及其对模型颤振产生的不同作用取决于模型表面波动压力的分布特征，这就使得振动模型表面波动压力分布特性成为影响模型颤振的主要因素。在颤振I临界状态下，振动模型表面波动压力的主要成分向模型迎风侧漂移，造成振动模型扭转运动的中心前移，与模型的几何扭转中心不再重合，发生了偏移。

英文摘要：

The aerodynamic derivatives were expressed by the fluctuation pressure on the plate surface through rational simplification. The influence of fluctuation pressure distribution characteristics on the aerodynamic derivatives was studied by using of numerical simulation method based on the fluid-solid loosely coupled calculation strategy and existing fluid software user defined function （UDF）. The influence of aerodynamic derivatives on the model vibration and aerodynamic coupling phenomenon were explained at micro level. The study shows that aerodynamic coupling flutter derivative which produced different action on the flutter depended on the model surface fluctuating pressure distribution. So the main factor of model flutter was determined by the fluctuating pressure distribution. The main component of fluctuation pressure was drifted to the model windward side in the flutter critical state, which caused the center of torsional vibration move forward and not coincide with the geometric torsion level.