A Study on Vibration Control in Wind Turbines

本研究对风力发电机组的振动及其抑制进行了研究。风力机被建模为一个塔和叶片的耦合系统。地面上的风力涡轮机受到随地面高度变化的风压，而海上风力涡轮机则受到风压和海浪的影响。数值结果表明，风力机发生了非线性振动。为了抑制地面风力机的振动，安装了调质阻尼器、摆和调液阻尼器等动力减振器。陀螺仪安装在海上风力发电机的浮动底座上，以抑制海浪引起的振动。研究了吸振器和陀螺仪参数取值对其性能的影响。

This research investigated the vibrations of wind turbines for electrical power generation and suppression of the vibrations. The wind turbine is modeled as a coupled system of a tower and blades. Wind turbines on the ground are subjected to wind pressure which varies with the height from the ground, while the offshore wind turbines are subjected to the wind pressure and wave. The numerical results showed the occurrence of the nonlinear vibrations of the wind turbines. Some kinds of dynamic absorbers such as tuned mass dampers, pendulums and tuned liquid dampers are installed to suppress the vibrations of the wind turbines on the ground. Gyroscopes is attached to the floating bases of the offshore wind turbines to suppress the vibration cased by the wave. The influences of values of absorber's and gyroscope's parameters on their performance are also examined.