漂浮压载状态下自升式平台的运动响应分析
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大连理工大学 建设工程学部

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O352

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国家重点研发计划(2021YFB2601100)


Motion Response Analysis of Jack-up Platform Under Floating Preload Condition
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Faculty of Infrastructure Engineering,Dalian University of Technology

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    摘要:

    漂浮压载是自升式平台的一种特殊压载状态,具有吃水浅的特点,水线处波动对物体上波浪力有显著影响,传统的一阶理论在漂浮压载工况下水动力计算精度不足。以某自升式海上石油钻井平台为研究对象,建立平台的水动力分析模型,在浅吃水状态下,考虑波浪对平台的二阶作用,运用高阶边界元方法对平台的一阶和二阶水动力问题进行求解。通过数值模拟,给出了多种波浪频率入射条件下,平台的波浪力和运动响应数值计算结果,对比结果表明,漂浮压载状态下,二阶波浪力在水平方向上对波浪力幅值影响较大,从运动响应角度看,无论水平还是竖直方向,二阶波浪作用都不可忽视。

    Abstract:

    Floating preload condition is a special state with shallow draft of jack-up platform and the fluctuation of the water line affects the wave force on the platform significantly, so it is not accuracy enough if applying the first-order theory only in hydrodynamic calculation under this condition. Taking a jack-up offshore oil drilling platform as the research object, the hydrodynamic analysis model of the platform is established. In the shallow draft state, considering the second-order wave force on the platform, the high-order boundary element method is used to solve the first-order and second-order hydrodynamic problems of the platform. Through numerical simulation, the numerical calculation results of wave force and motion response of the platform under various incident wave frequencies are given. The results show that the second-order wave force has a great influence on the amplitude of wave force in the horizontal direction under floating preload condition, and the it can’t be ignored in both horizontal and vertical directions from the perspective of motion response.

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  • 收稿日期:2022-03-15
  • 最后修改日期:2022-04-13
  • 录用日期:2022-04-19
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