Investigation and analysis on wind turbine tower vibrations and vibration control it using absorbent

Subject Areas : Vibration Transmision

asadollah khorasani ¹ , مهدی شریف نیا ²

1 - مسئول
2 - استاد راهنما

Received: 2018-08-10 Accepted : 2018-09-21 Published : 2018-11-22

Keywords: Natural frequency, Wind turbine, vibrations, Absorbent, Viton,

Abstract :

Nowadays, due to critical conditions of fossil fuels, it is required to attend the wind energy and the wind turbines (onshore and offshore) more than before. In order to efficiently use this clean energy, length of the blade and tower of the turbine should be increased. In the present research, using a typical damper, structural control of a wind turbine is investigated. Suppression of vibration in the turbine structure and avoiding from the resonance interval are tracked. To absorb the vibration of a structure, one way is using the absorbent material in its body. In this study, first, natural frequencies of the wind turbine are obtained using the Abaqus software. Next, in order to suppress the vibration of the wind turbine, an absorbing system is used, and the new natural frequencies are obtained. Natural frequencies in these two cases are compared, and consequently, the absorbing system is verified. Additionally, a displacement input is applied to the turbine tower. The resulting responses of the head and blade of the turbine show that the vibrations of the turbine are successfully reduced.