Simulation Study on Vibration of Wind Turbine with Double-Forked Blade Tip Structure

Abstract

In order to obtain the influence of double-fork blade tip structure on vibration characteristics of wind turbine under different parameters, the modal and vibration analysis of static and rotating states of three double-fork blade tip structure wind turbine was carried out by using Ansys finite element analysis software. The results show that: The natural frequency of the wind turbine can be changed by the three double-fork blade tip structures. The natural frequency decreases less in the first, second and sixth order, and 19%~22% in the third to fifth order. The mode diagram shows that the double-fork blade tip structure can eliminate part of the torsional mode of engine room and tower. At different rotational speeds, the vibration frequencies of the three double-fork blade tip structures all have a decreasing trend, decreasing by 8%-16%, and the double-fork blade tip structure-3 decreases the most. The conclusions provide a new idea for wind turbine model vibration reduction research.