STUDY ON EFFECT OF SPACING RATIO ON VIM CHARACTERISTICS OF SEMI-SUBMERSIBLE OFFSHORE WIND TURBINE

Wei Dongze; Liu Zuhong; Qiao Mengna

doi:10.19912/j.0254-0096.tynxb.2024-1888

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (2) : 599-605. DOI: 10.19912/j.0254-0096.tynxb.2024-1888

STUDY ON EFFECT OF SPACING RATIO ON VIM CHARACTERISTICS OF SEMI-SUBMERSIBLE OFFSHORE WIND TURBINE

Wei Dongze, Liu Zuhong, Qiao Mengna

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Abstract

In order to investigate the effect of spacing ratio on the vortex-induced motion of semi-submersible offshore wind turbine, this paper adopts the method of towed pool model test to carry out the research on the effect of spacing ratio on the key features of the response amplitude, frequency and trajectory of the vortex-induced motion of semi-submersible wind turbine at a 45° incidence. Three phases of more pronounced vortex-induced motion were observed, i.e. per-lock-in region, lock-in region, and post-lock-in region. It is shown that the spacing ratio is an important factor in determining the amplitude of the three-way motion response of a semi-submersible wind turbine, and that larger spacing ratios may lead to more intense motions, which may result in a greater risk of fatigue damage to the structure. The effect of spacing ratio on the structure three-way motion coupling relationship is not obvious, at the same time, while the structure motion trajectory of each spacing ratio is basically the same as the rule of change of reduced velocity.

Key words

semi-submersible offshore wind turbine / spacing ratio / vortex-induced motions / frequency / response amplitude / motion path

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Wei Dongze, Liu Zuhong, Qiao Mengna. STUDY ON EFFECT OF SPACING RATIO ON VIM CHARACTERISTICS OF SEMI-SUBMERSIBLE OFFSHORE WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2026, 47(2): 599-605 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1888

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