Abstract
To analyze wind-induced response characteristics of a wind turbine tower more accurately, the blade-tower coupling effect was investigated. The mean wind velocity of the rotating blades and tower was simulated according to wind shear effects, and the fluctuating wind velocity time series of the wind turbine were simulated by a harmony superposition method. A dynamic finite element method (FEM) was used to calculate the wind-induced response of the blades and tower. Wind-induced responses of the tower were calculated in two cases (one included the blade-tower coupling effect, and the other only added the mass of blades and the hub at the top of the tower), and then the maximal displacements at the top of the tower of the tow cases were compared with each other. As a result of the influence of the blade-tower coupling effect and the total base shear of the blades, the maximal displacement of the first case increased nearly by 300% compared to the second case. To obtain more precise analysis, the blade-tower coupling effect and the total base shear of the blades should be considered simultaneously in the design of wind turbine towers.
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Project supported by the National Natural Science Foundation of China (No. 50708015), and the Program for New Century Excellent Talents in University (No. NCET-06-0270), China
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Chen, Xb., Li, J. & Chen, Jy. Wind-induced response analysis of a wind turbine tower including the blade-tower coupling effect. J. Zhejiang Univ. Sci. A 10, 1573–1580 (2009). https://doi.org/10.1631/jzus.A0820750
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DOI: https://doi.org/10.1631/jzus.A0820750