A Study on Vibration Control in Wind Turbines

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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.