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Citation:
　Jing Li,Jianyun Chen and Xiaobo Chen.Dynamic Characteristics Analysis of the Offshore Wind Turbine Blades[J].Journal of Marine Science and Application,2011,(1):82-87.
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Dynamic Characteristics Analysis of the Offshore Wind Turbine Blades

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Title:
Dynamic Characteristics Analysis of the Offshore Wind Turbine Blades
Author(s):
Jing Li;  Jianyun Chen and Xiaobo Chen
Affilations:
Author(s):
Jing Li;  Jianyun Chen and Xiaobo Chen
1. Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China 2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
Keywords:
centrifugal stiffening effect;  blade dynamic characteristic;  stiffening coefficient;  natural frequency;  offshore wind turbine
分类号:
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DOI:
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Abstract:
The topic of offshore wind energy is attracting more and more attention as the energy crisis heightens. The blades are the key components of offshore wind turbines, and their dynamic characteristics directly determine the effectiveness of offshore wind turbines. With different rotating speeds and blade length, the rotating blades generate various centrifugal stiffening effects. To directly analyze the centrifugal stiffening effect of blades, the Rayleigh energy method (REM) was used to derive the natural frequency equation of the blade, including the centrifugal stiffening effect and the axial force calculation formula. The axial force planes and the first to third order natural frequency planes which vary with the rotating speed and length were calculated in three-dimensional coordinates. The centrifugal stiffening coefficient was introduced to quantitatively study the relationship between the centrifugal stiffening degree and the rotating speed, and then the fundamental frequency correction formula was built based on the rotating speed and the blade length. The analysis results show that the calculation results of the fundamental frequency correction formula agree with the theoretical calculation results. The error of calculation results between them is less than 0.5%.

References:

Baumgart A (2002). A mathematical model for wind turbine blade. Journal of Sound and Vibration, 25(11), 1-12.
 Harrison R, Hau E, Snel H (2000). Large wind turbine: design and economics. John Wiley and Sons Ltd, New York, 25-48.
Himri Y, Rehman S, Draoui B, Himri S (2008). Wind power potential assessment for three locations in Algeria. Renewable and Sustainable Energy Reviews, 12(9), 2495-2504.
Jian Kailin (2001). Computation of natural frequencies of a rotating beam. Journal of Chongqing University, 24(6), 36-39. (in Chinese)
Lavassas I, Nikolaidis G, Zervas P, Efthimiou E (2003). Analysis and design of the prototype of a steel 1-MW wind turbine tower. Engineering Structures, 25, 1097-1106.
Lee CL, Al-Salem MF, Woehrle TG (2001). Natural frequency measurements for rotating span wise uniform cantilever beams. Journal of Sound and Vibration, 240(5), 57-61.
Lee D, Hodges DH, Patil MJ (2002). Multi-flexible-body dynamic analysis of horizontal axis wind turbines. Wind Energy, 5(4), 281-300.
Lesaffre N, Sinou JJ, Thouverez F (2007). Stability analysis of rotating beams rubbing on an elastic circular structure. Journal of Sound and Vibration, 299, 1005-1032.
 Li Deyuan, Ye Zhiyuan, Chen Yan (2005). Multi-body dynamics numerical analysis of rotating blade of horizontal axis wind turbine. Acta Energiae Solaris Sinica, 26(4), 473-481. (in Chinese)
 Murtagh PJ, Basu B, Broderick BM (2005). Along-wind response of a wind turbine tower with blade coupling subjected to rotatingly sampled wind loading. Engineering Structure, 27, 1209-1219.
Naguleswaran S (1994). Lateral vibration of a centrifugally tensioned uniform Euler-Bernoulli beam. Journal of Sound and Vibration, 176(5), 613-24.
Tavner P (2008). Wind power as a clean-energy contributor. Energy Policy, 36(12), 4397-4400.
Wang Zhixin, Jiang Chuanwen, Ai Qian, Wang Chengmin (2007). The key technology of offshore wind farm and its new development in China. Renewable & Sustainable Energy Reviews, 13(1), 216-222
Xin Weiping (2005). Analysis of dynamic characteristics and response for rotating blades of wind turbine. Master thesis, Shan Tou University, Shantou. (in Chinese)
Zhou Yun, Chen cun’en (2002). Disaster preventing and reduction of civil engineering. South China University of Technology Press, Guangzhou, 92-100. (in Chinese)

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Last Update: 2011-05-04