Open Access

ARTICLE

Influence of Trailing-Edge Wear on the Vibrational Behavior of Wind Turbine Blades

Yuanjun Dai^1,2,*, Xin Wei¹, Baohua Li¹, Cong Wang¹, Kunju Shi¹

1 Mechanical College, Shanghai Dian Ji University, Shanghai, 201306, China
2 College of Energy Engineering, Xinjiang Institute of Engineering, Urumqi, 830091, China

* Corresponding Author: Yuanjun Dai. Email:

Fluid Dynamics & Materials Processing 2024, 20(2), 337-348. https://doi.org/10.32604/fdmp.2023.042434

Received 30 May 2023; Accepted 15 August 2023; Issue published 14 December 2023

Abstract

To study the impact of the trailing-edge wear on the vibrational behavior of wind-turbine blades, unworn blades and trailing-edge worn blades have been assessed through relevant modal tests. According to these experiments, the natural frequencies of trailing-edge worn blades −1, −2, and −3 increase the most in the second to fourth order, the fifth order increases in the middle, and the first order increases the least. The damping ratio data indicate that, in general, the first five-order damping ratios of trailing-edge worn blades −1 and trailing-edge worn blades −2 are reduced, and the first five-order damping ratios of trailing-edge worn blades −3 are slightly improved. The mode shape diagram shows that the trailing-edge worn blades −1 and −2 have a large swing in the tip and the blade, whereas the second- and third-order vibration shapes of the trailing edge-worn blade −3 tend to be improved. Overall, all these results reveal that the blade’s mass and the wear area are the main factors affecting the vibration characteristics of wind turbine blades.

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Keywords

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