考虑气动弹性对风力机叶片的影响,采用叶素-动量理论计算气动力,采用盒形梁理论计算结构变形,耦合静气动弹性平衡方程,建立了风力机叶片静气动弹性分析程序.本文运用该程序进行了多种风速下叶片载荷及风轮性能的计算,分析了气动弹性对原设计的影响.结果表明,对于兆瓦级风力机,在大风速情况下,气动弹性对风轮性能有着明显影响,并会造成气动载荷的重新分布,影响结构设计的准确性.该方法可用于对叶片气动设计与载荷计算方法进行气动弹性修正.%The aeroelastic effect for wind turbine blade is investigated in this article. A code is programmed,which utilizes the blade element momentum method to calculate the aerodynamics and adopts the multi-cell beams method to calculate the structural distortion, coupling with static aeroelastic balancing equation. The loads on the blade and the aerodynamic performance of the wind turbine at various wind speeds are calculated, and the influence of aeroelastics to the original design is analyzed. It is demonstrated that the aeroelastic effect has obvious influence to the large-size wind turbine performance at high wind speeds, and causes the aerodynamic loads redistribute, which would affect the accuracy of structure design. This method can be used to correct the conventional blade aerodynamic design and load calculation method.
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