中文摘要：

研究复合材料风力机转子叶片的非线性气弹稳定性问题。叶片结构采用匀速旋转的、具有周向反对称刚度（CAS）构型的弯—扭耦合复合材料薄壁梁模型;气动力采用大攻角动力失速非线性ONERA模型。基于Galerkin法建立广义坐标表示的叶片二阶非线性气弹常微分方程组,利用片条理论简化对非线性广义气动力的求解。基于摄动技术在非线性静平衡点附近对非线性气弹系统进行线性化,采用特征值方法以及时域积分法估计叶片的非线性颤振边界和气弹响应的稳定性问题。通过数值分析,揭示叶片转速、叶片纤维铺层角对非线性颤振边界的影响。

英文摘要：

A nonlinear aeroelastic analysis model of the composite wind turbine blade is presented.The composite structural model is an anisotropic thin-walled closed-section beam with bending-twist coupling produced by a special ply-angle configuration,referred to as circumferentially asymmetric stiffness（CAS）.The aerodynamic model used in the present paper is the differential dynamic stall model developed at ONERA.By means of Galerkin＇s method,the nonlinear aeroelastic equations are reduced to ordinary equations.The general aerodynamic forces are obtained from strip theory.The resulting equations are then linearized for small perturbation about the equilibrium point and the stability characteristics are investigated through eigenvalue analysis and time domain integration.