Experimental study on dynamic characteristic of a new semi-submersible floating offshore wind turbine

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (20) : 252-257.

ZHAO Zhanhua1, FAN Yali1, KUANG Xiaofeng1, ZHOU Shuni2, ZHANG Kai1

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Abstract

Taking a new semi-submersible floating wind power system as the research object, a fully coupled physical pool test model is established. Through a series of pool model tests, the inherent characteristics of the floating wind turbine system and the overall response of the system under the full coupling of multiple physical fields are studied. The results show that the six degrees of freedom natural periods of the system are far away from the actual offshore wave frequency range, and the maximum pitch motion is significantly less than the design permitted maximum value by 50% and 10% for operation condition Hs 3.92m and extreme condition Hs 3.92m, indicating that the new floating platform has excellent motion stability. It is also found in the test that there is a multi-modal superposition resonance between the 3P rotation of the blade and natural period of the tower, which should be paid attention to in the structural optimization.
Key word: New type；Semi-submersible；Coupling；Tower top load；Pool test

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New type / Semi-submersible / Coupling / Tower top load / Pool test

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ZHAO Zhanhua1, FAN Yali1, KUANG Xiaofeng1, ZHOU Shuni2, ZHANG Kai1. Experimental study on dynamic characteristic of a new semi-submersible floating offshore wind turbine[J]. Journal of Vibration and Shock, 2022, 41(20): 252-257

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