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Damage detection of flange bolts in wind turbine towers using dynamic strain responses
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Damage detection of flange bolts in wind turbine towers using dynamic strain responses
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Journal Article
Damage detection of flange bolts in wind turbine towers using dynamic strain responses
2023
Overview
With the development of wind power industry, the adoption of the wind turbine has achieved continuous growth over the years. As the key component to connect the adjacent segments of the towers, the flange bolts play a vital role in the safe operation of the wind turbine towers. The detection of loose bolts has drawn extensive attention. The primary objectives of this research are to present a method for damage detection of flange bolts in the wind turbine towers. In this paper, the formulation of the damage index based on the dynamic strain responses is first presented based on the mechanical characteristics of the wind turbine towers. Then, a parametric analysis is conducted based on the numerical simulation to investigate the influence of the loose bolt location on the damage index. Some important results are extracted in the parametric analysis, which is further validated by the experimental investigation into a large-scale steel tube specimen whose flange has 12 bolts. Finally, a methodology for damage detection of the flange bolts is proposed, which can identify the regional location of loose bolts.
