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Effect of Rigid Pitch Motion on Flexible Vibration Characteristics of a Wind Turbine Blade

Zhan Wang1, Liang Li2,*, Long Wang1, Weidong Zhu3, Yinghui Li4, Echuan Yang5

1 School of Mechanical Engineering, Anhui University of Science and Technology, Huainan, 232001, China
2 School of Mechanics and Optoelectronic Physics, Anhui University of Science and Technology, Huainan, 232001, China
3 Department of Mechanical Engineering, University of Maryland, Baltimore, MD 21250, USA
4 School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu, 610031, China
5 School of Mechanical Engineering, Chongqing University of Technology, Chongqing, 400054, China

* Corresponding Author: Liang Li. Email: email

Energy Engineering 2024, 121(10), 2981-3000. https://doi.org/10.32604/ee.2024.048161

Abstract

A dynamic pitch strategy is usually adopted to improve the aerodynamic performance of the blade of a wind turbine. The dynamic pitch motion will affect the linear vibration characteristics of the blade. However, these influences have not been studied in previous research. In this paper, the influences of the rigid pitch motion on the linear vibration characteristics of a wind turbine blade are studied. The blade is described as a rotating cantilever beam with an inherent coupled rigid-flexible vibration, where the rigid pitch motion introduces a parametrically excited vibration to the beam. Partial differential equations governing the nonlinear coupled pitch-bend vibration are proposed using the generalized Hamiltonian principle. Natural vibration characteristics of the inherent coupled rigid-flexible system are analyzed based on the combination of the assumed modes method and the multi-scales method. Effects of static pitch angle, rotating speed, and characteristics of harmonic pitch motion on flexible natural frequencies and mode shapes are discussed. It shows that the pitch amplitude has a dramatic influence on the natural frequencies of the blade, while the effects of pitch frequency and pith phase on natural frequencies are little.

Graphic Abstract

Effect of Rigid Pitch Motion on Flexible Vibration Characteristics of a Wind Turbine Blade

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APA Style
Wang, Z., Li, L., Wang, L., Zhu, W., Li, Y. et al. (2024). Effect of rigid pitch motion on flexible vibration characteristics of a wind turbine blade. Energy Engineering, 121(10), 2981-3000. https://doi.org/10.32604/ee.2024.048161
Vancouver Style
Wang Z, Li L, Wang L, Zhu W, Li Y, Yang E. Effect of rigid pitch motion on flexible vibration characteristics of a wind turbine blade. Energ Eng. 2024;121(10):2981-3000 https://doi.org/10.32604/ee.2024.048161
IEEE Style
Z. Wang, L. Li, L. Wang, W. Zhu, Y. Li, and E. Yang "Effect of Rigid Pitch Motion on Flexible Vibration Characteristics of a Wind Turbine Blade," Energ. Eng., vol. 121, no. 10, pp. 2981-3000. 2024. https://doi.org/10.32604/ee.2024.048161



cc Copyright © 2024 The Author(s). Published by Tech Science Press.
This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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