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Zili Zhang

Theoretical study and experimental verification of vibration control of offshore wind turbines by a ball vibration absorber

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In this paper, a ball vibration absorber (BVA) is introduced for vibration control of offshore wind turbines. The dynamic responses of offshore wind turbines equipped with a BVA are presented. Both theoretical and experimental investigations are carried out. An analytical model for the wind turbine tower system with installed BVA is developed based on Lagrange's equation. The BVA-structure integrated equations are derived and solved in both time domain and frequency domain. A series of shaking table tests on a 1/13-scale wind turbine model with and without a BVA were carried out to evaluate the effects of BVA on the vibration mitigation of the wind turbine tower system under earthquakes and equivalent wind-wave loads. Numerical simulations of the system are performed and compared with the experimental results. Good agreement between the numerical and experimental results is observed. The results indicate that BVA could effectively improve the performance of the offshore wind turbine.
Original languageEnglish
JournalStructure & Infrastructure Engineering
Volume10
Issue8
Pages (from-to)1087-1100
Number of pages14
ISSN1573-2479
DOIs
Publication statusPublished - 2014
Externally publishedYes

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