Remote monitoring and nondestructive evaluation of wind turbine towers

Chih-Hung Chiang; Chih-Peng Yu; Keng-Tsang Hsu; Chia-Chi Cheng; Ying-Tzu Ke; Yi-Ru Shih

doi:10.1117/12.2044942

9 March 2014 Remote monitoring and nondestructive evaluation of wind turbine towers

Chih-Hung Chiang, Chih-Peng Yu, Keng-Tsang Hsu, Chia-Chi Cheng, Ying-Tzu Ke, Yi-Ru Shih

Proceedings Volume 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014; 90631J (2014) https://doi.org/10.1117/12.2044942
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

Wind turbine towers are in need of condition monitoring so as to lower the cost of unexpected maintenance. Wind loading from turbulence and gusts can cause damage in horizontal axis wind turbines even the supporting towers. Monitoring of wind turbines in service using embedded data sensor arrays usually is not targeted at the turbine-tower interaction from the perspective of structural dynamics. In this study the remote monitoring of the tower supporting a horizontal-axis wind turbine was attempted using a microwave interferometer. The dominant frequency of one tower was found to be decreased by more than 20% in 16 months. Numerical modeling using spectral finite elements is in progress and should provide further information regarding frequency shift due to stiffness variation and added mass. Expected outcome will contribute to remote monitoring procedures and nondestructive evaluation techniques for local wind turbine structures during operation.

Citation Download Citation

Chih-Hung Chiang, Chih-Peng Yu, Keng-Tsang Hsu, Chia-Chi Cheng, Ying-Tzu Ke, and Yi-Ru Shih "Remote monitoring and nondestructive evaluation of wind turbine towers", Proc. SPIE 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014, 90631J (9 March 2014); https://doi.org/10.1117/12.2044942

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