风力机叶片, 气动弹性, 偏移变形特性, 数值模拟

Based on the structural dynamic equations of blades, an aeroelastic model of a rotating rotor and the numerical simulation method of the deflections were presented under aerodynamic loads and centrifugal forces. Coupling the aerodynamic characteristics and the structure stress, the flapwise and edgewise loads and deflections of the rotating blades were calculated and plotted by using this model. Finally, the computation was completed for a 2MW wind turbine. The deflections of the blades under different wind speeds and different rotating time were given to validate the reliability of the model presented herein. The results have very important significance to estimate the vibration performance, fatigue life of the blades and to direct the design of high performance blades. 

wind turbine balde, aeroelastics, deflection performance, numerical simulation