考虑桩基错动的深水张力腿平台动力响应研究

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Abstract Due to earthquakes, faults, landslides and settlements, the leg foundation under a tension leg platform (TLP) may move. Based on the once-a-year design condition of Liuhua Oilfield in the South China Sea, the time history of the dynamic response of the platform system under 16 cases with the foundation moves down 0.1 meters is calculated. The amplitude and standard deviation of the six DOFs motion as well as the mooring tension in different cases were compared. The results show that the foundational movements have significant impacts on the amplitude of the six DOFs response and tension leg tension, but do not aggravate the fluctuations of these responses; the foundational movements will destroy the original symmetry of the platform system and lead to a greater deterioration in the heave motion; the foundational movements will increase leg tensions significantly and there is a risk of tension leg breakage and mooring failure.

Key words： tension leg platform foundational movement coupled model dynamic response mooring failure

Received: 25 August 2021 Published: 15 March 2023

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I5/39

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