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Structural Engineering and Mechanics Volume 56, Number 6, December25 2015 , pages 1021-1040 DOI: https://doi.org/10.12989/sem.2015.56.6.1021 |
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Aerodynamic loads and aeroelastic responses of large wind turbine tower-blade coupled structure in yaw condition |
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S.T. Ke, T.G. Wang, Y.J. Ge and Y. Tamura
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| Abstract | ||
| An effective method to calculate aerodynamic loads and aeroelastic responses of large wind turbine tower-blade coupled structures in yaw condition is proposed. By a case study on a 5 MW large wind turbine, the finite element model of the wind turbine tower-blade coupled structure is established to obtain the modal information. The harmonic superposition method and modified blade-element momentum theory are used to calculate aerodynamic loads in yaw condition, in which the wind shear, tower shadow, tower-blade modal and aerodynamic interactions, and rotational effects are fully taken into account. The mode superposition method is used to calculate kinetic equation of wind turbine tower-blade coupled structure in time domain. The induced velocity and dynamic loads are updated through iterative loop, and the aeroelastic responses of large wind turbine tower-blade coupled system are then obtained. For completeness, the yaw effect and aeroelastic effect on aerodynamic loads and wind-induced responses are discussed in detail based on the calculating results. | ||
| Key Words | ||
| wind turbine tower-blade coupled structure; aerodynamic loads; aeroelastic effect; yaw effect; parameter analysis | ||
| Address | ||
| S.T. Ke and T.G. Wang: Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design, Nanjing University of Aeronautics and Astronautics, Yudao Road 29, Nanjing 210016, China Y.J. Ge: State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China Y. Tamura: Center of Wind Engineering Research, Tokyo Polytechnic University, 1583 Iiyama, Atsugi, Kanagawa 243-0297, Japan | ||