Analysis of Transient Response of Wind Turbine Blade Based Timoshenko Beam

In order to analyze the transient responses of the wind turbine blade, the blade is modeled by the two-node Timoshenko beam element, considering the shear effect, centrifugal stiffening, the natural dynamic characteristics of the blade were analyzed. The structural dynamic equation was established, the loads acting on the blade were analyzed. Loads of a 1.5 MW wind turbine blade under gust and voltage drop are calculated, take the aerodynamic damping into account and the dynamic equation was solved by the modal superposition principle, the transient dynamic responses under gust wend voltage drop were obtained. The results showed that gust and voltage drop excite transient vibration of blade, aerodynamic damping considerably affect the dynamic response of the blade.