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首页> 外文期刊>Ocean Engineering >Impacts of top-end vessel sway on vortex-induced vibration of the submarine riser for a floating platform in deep water
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Impacts of top-end vessel sway on vortex-induced vibration of the submarine riser for a floating platform in deep water

机译：高端船舶摇摆对深水漂浮平台海底立管涡激振动的影响

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摘要

The dynamic coupling between moving top-end vessel and submarine riser becomes more remarkable for floating platform in deep water due to its larger amplitude of top-end motion, compared to fixed platform in shallow water. The impacts of top-end motion on the riser undergoing vortex-induced vibration (VIV) are explored in this study. A coupled hydrodynamic force approach, involving the vortex-induced lift force along with the fluid drag force, is developed, which takes into account the interaction between fluid dynamic force and instantaneous riser motion. Then the dynamic behaviors of the riser suffering both top-end motion and VIV are examined by means of finite element simulations. The effects of the amplitude and frequency of top-end vessel sway on riser's VIV are studied. During the riser's dynamic responses, an interesting phenomenon, called nonlinear response amplification, is observed, which demonstrates that top-end motion may be amplified as the motion propagates along riser length. Our numerical results show that the riser's displacement becomes several times larger than that of the case without top-end motion. Moreover, the nonlinear amplification gets more pronounced as the number of mode order drops, but the amplification factor just slightly changes with the increase of sway amplitude. (C) 2015 Elsevier Ltd. All rights reserved.
机译：与浅水中的固定平台相比，由于其顶部运动幅度较大，因此在深水中的浮动平台中，移动的高端船舶与海底立管之间的动态耦合变得更加显着。在这项研究中探讨了顶端运动对立管遭受涡激振动（VIV）的影响。开发了一种耦合流体动力方法，该方法涉及涡旋引起的升力以及流体阻力，该方法考虑了流体动力与瞬时立管运动之间的相互作用。然后，通过有限元模拟研究了同时受到顶端运动和VIV侵害的立管的动态行为。研究了顶部船舶摇摆的幅度和频率对立管VIV的影响。在立管的动态响应过程中，观察到一个有趣的现象，称为非线性响应放大，这表明随着运动沿立管长度传播，顶端运动可能会被放大。我们的数值结果表明，立管的位移比没有顶端运动的情况大几倍。此外，非线性放大随着模式阶数的减少而变得更加明显，但是放大系数随摆幅的增加而略有变化。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Ocean Engineering》 |2015年第1期|1-8|共8页
  • 作者

    Chen Weimin; Li Min; Zheng Zhongqin; Guo Shuangxi; Gan Kuan;

  • 作者单位

    Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China;

    Beijing Univ Aeronaut & Astronaut, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China;

    Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China;

    Beijing Univ Aeronaut & Astronaut, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sway; Fluid solid coupling; Riser; Vortex-induced vibration;

    机译：摇摆;流体固体耦合;立管;涡激振动;

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