Designing of smart composite materials wind turbine blade and finite element analysis

With the increasing size of wind turbine blades,the need for more sophisticated load control techniques has induced the interest for aerodynamic control systems with build-in intelligence on the blades.New structural concepts have emerged where multifunctional materials,exhibiting a strong coupling between its mechanical response and its electrical behaviour,which work as sensors and actuators,are embedded or bonded to composite blades for high-performance structural applications.A finite element model of the smart blade for wind turbines is provided.Numerical analysis is performed by using finite element method,which is used to calculate the time response of the model.The displacement and stress response from the piezoelectric actuator are obtained to control the vibration,and compared with the fluid calculation results of the aerodynamic stress.By using this model,an active vibration method which effectively suppresses the vibrations of the smart blade is designed.