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Integrated aero-structural optimization design of pre-bend wind turbine blades

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Abstract

In the optimization design of a pre-bend wind turbine blade, there is a coupling relationship between blade aerodynamic shape and structural layup. The evaluation index of a wind turbine blade not only shows on conventional ones, such as Annual energy production (AEP), cost, and quality, but also includes the size of the loads on the hub or tower. Hence, the design of pre-bend wind turbine blades is a true multi-objective engineering task. To make the integrative optimization design of the pre-bend blade, new methods for the blade’s pre-bend profile design and structural analysis for the blade sections were presented, under dangerous working conditions, and considering the fundamental control characteristics of the wind turbine, an integrated aerodynamic-structural design technique for pre-bend blades was developed based on the Multi-objective particle swarm optimization algorithm (MOPSO). By using the optimization method, a three-dimensional Pareto-optimal set, which can satisfy different matching requirements from overall design of a wind turbine, was obtained. The most suitable solution was chosen from the Pareto-optimal set and compared with the original 1.5 MW blade. The results show that the optimized blade have better performance in every aspect, which verifies the feasibility of this new method for the design of pre-bend wind turbine blades.

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Correspondence to Xiaofeng Guo.

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Recommended by Associate Editor Beomkeun Kim

Xiaofeng Guo received his Ph.D. in Mechanical Engineering at Chongqing University in 2015. He is a Lecturer in the School of Mechanical Science & Engineering at Zhongyuan University of Technology.

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Guo, X., Fu, X., Shang, H. et al. Integrated aero-structural optimization design of pre-bend wind turbine blades. J Mech Sci Technol 30, 5103–5113 (2016). https://doi.org/10.1007/s12206-016-1028-2

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  • DOI: https://doi.org/10.1007/s12206-016-1028-2

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