Influence of Beam Structure on the Modal Characteristics of Composite Wind Turbine Blade

Abstract

Wind turbine blade, which was made of composite materials, is one of the most important parts for wind turbine. The better design, higher reliability and superior performance of wind turbine blade are the decisive factors for normal and stable operation of wind turbine. In this paper, the influence of beam structure on the modal characteristics of wind turbine blades under static and rotating states were studied by using ANSYS finite element method software. Comparing the simulation results it can be found that although working conditions has little effect on vibration modes, natural frequencies are depended on the working conditions and beam structures.