The stability of platform structure is the paramount guarantee of the safe operation of the offshore floating wind turbine. The NREL 5MW floating wind turbine is established based on the OC3-Hywind Spar Buoy platform with the supplement of helical strakes for the purpose to analyze the impact of helical strakes on the dynamic response of the floating wind turbine Spar platform. The dynamic response of floating wind turbine Spar platform under wind, wave and current loading from the impact of number, height and pitch ratio of the helical strakes is analysed by the radiation and diffraction theory, the finite element method and orthogonal design method. The result reveals that the helical strakes can effectively inhibit the dynamic response of the platform but enlarge the wave exciting force; the best parameter combination is two pieces of helical strakes with the height of 15%D (D is the diameter of the platform) and the pitch ratio of 5; the height of the helical strake and its pitch ratio have significant influence on pitch response.
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Foundation item: The research was financially supported by the National Natural Science Foundation of China (Grant No. 51176129), the Innovation Key Program of Shanghai Municipal Education Commission (Grant No. 13YZ066), and the Doctoral Fund of the Ministry of Education of China (Grant No. 20123120110008).
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Ding, Q., Li, C. Research on the influence of helical strakes on dynamic response of floating wind turbine platform. China Ocean Eng 31, 131–140 (2017). https://doi.org/10.1007/s13344-017-0016-3
- floating wind turbine
- helical strakes
- orthogonal design