Title :
Response spectrum analysis of wind turbine with joint action of wind and wave
Author :
Cai, Anmin ; Zhang, Zheng ; Zhang, Datong ; Liu, Dongyuan
Author_Institution :
R&D Inst. of Guodian wind power Equip. Technol., Guodian United Power Technol. Co., Ltd., Beijing, China
Abstract :
The single degree of freedom offshore wind turbine system load model is analyzed and calculated by adopting the single degree of freedom linear system response power spectrum method. Some results, including the vibration velocity spectrum, the acceleration spectrum, the shear spectrum of tower bottom, and the moment spectrum, are obtained. Through the analysis of the response spectrum, it is found that the sheer force and the response of moment of the tower bottom are not only dependent on the aerodynamic load spectrum and the wave force spectrum, but are also determined by the natural frequency of the system and the damping ratio. It also does not lay directly on the equivalent mass of the system and the equivalent stiffness. So, it can be deduced that the natural frequency of the system and damping ratios are decisive in the design of the tower frame and foundation.
Keywords :
offshore installations; power system simulation; wind turbines; acceleration spectrum; aerodynamic load spectrum; damping ratio; equivalent mass; equivalent stiffness; load model; moment spectrum; offshore wind turbine system; response spectrum analysis; shear spectrum of tower bottom; single degree of freedom linear system response power spectrum method; vibration velocity spectrum; wave force spectrum; Acceleration; Aerodynamics; Damping; Equations; Frequency; Linear systems; Poles and towers; Research and development; Wind energy; Wind turbines;
Conference_Titel :
World Non-Grid-Connected Wind Power and Energy Conference, 2009. WNWEC 2009
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4702-2
DOI :
10.1109/WNWEC.2009.5335757