Fluid-Induced Vibrations of Wind Turbine (Pages 16-21)

Isaac Wait1, Xiaotian Xu1, Feng Xiao2, Zhaohui (Joey) Yang3, Gang Chen1 and Benjamin Still4

1College of IT & Engineering, Marshall University, Huntington, WV 25755, USA; 2Department of Civil Engineering, Nanjing University of Science and Technology, Nanjing, China; 3Department of Civil Engineering, Univ. of Alaska, Anchorage, Alaska 99508, USA; 4Alaska DOT&PF Bridge Section, 3132 Channel Dr, PO Box 112500, Juneau, AK 99811-2500

Abstract: This paper presents an analysis of fluid-induced vibrations of an operational wind turbine. The experimental data and FFT analysis show that under the effects of strong wind load, the wind turbine system exhibits certain complicated vibrations. The advanced spectrum analysis and phase space analysis reveal the complicated patterns of fluid-induced vibrations. A theoretical dynamics model is used to correlate with the testing and analysis results. The study offers some insights to the complicated vibrations and system monitoring of wind turbine.

Keywords: Wind turbine, Vibrations, Instabilities, Aeroelasticity.