STUDY ON STABILITY CALCULATION METHODS AND INFLUENCING FACTORS OF OFFSHORE WIND POWER SEMI-SUBMERSIBLE PLATFORMS

Pan Qiyun; Wang Xiaodong; Zhang Lijie; Zhou Xia

doi:10.19912/j.0254-0096.tynxb.2024-2003

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 375-383. DOI: 10.19912/j.0254-0096.tynxb.2024-2003

STUDY ON STABILITY CALCULATION METHODS AND INFLUENCING FACTORS OF OFFSHORE WIND POWER SEMI-SUBMERSIBLE PLATFORMS

Pan Qiyun, Wang Xiaodong, Zhang Lijie, Zhou Xia

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Abstract

Two parametric stability calculation methods are developed for semi-submersible platforms with medium- and large-angle inclinations, using a typical four-column semi-submersible platform as the study subject. The theoretical calculation methods are based on the equal displacement volume approach, which eliminates the need for geometric modeling and facilitates rapid parameter iteration in the early stages of platform design. These methods are employed to examine the effects of key design parameters on the stability of the semi-submersible platform. The results reveal that： the variation in the center of gravity position exhibits a sinusoidal relationship with the change in the stability arm; the most critical inclination axis for the platform corresponds to the 0° wind direction, implying that future studies on similar platforms will not need to identify the most critical inclination axis; parameters such as the water ingress angle, waterline moment of inertia, freeboard height, and column radius all show a positive correlation with stability; column spacing has an optimal value for maximizing the stability arm; and beyond a certain threshold, draft depth does not significantly affect the stability arm. These findings provide valuable insights for adjusting design parameters in platform development.

Key words

floating wind turbines / semi-submersible platform / stability criteria Box Formula / stability criteria / parameterization / stability influencing factors

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Pan Qiyun, Wang Xiaodong, Zhang Lijie, Zhou Xia. STUDY ON STABILITY CALCULATION METHODS AND INFLUENCING FACTORS OF OFFSHORE WIND POWER SEMI-SUBMERSIBLE PLATFORMS[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 375-383 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2003

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