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首页> 外文期刊>Ocean Engineering >Coupled dynamic analysis for wave interaction with a truss spar and its mooring line/riser system in time domain
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Coupled dynamic analysis for wave interaction with a truss spar and its mooring line/riser system in time domain

机译：时域内与桁架梁及其系泊索/竖管系统相互作用的耦合动力分析

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摘要

A full time-domain analysis program is developed for the coupled dynamic analysis of offshore structures. For the hydrodynamic loads, a time domain second order method is developed. In this approach, Taylor series expansions are applied to the body surface and free-surface boundary conditions, and the Stokes perturbation procedure is then used to establish the corresponding boundary value problems with time-independent boundaries. A higher-order boundary element method (HOBEM) is developed to calculate the velocity potential of the resulting flow field at each time step. The free-surface boundary condition is satisfied to the second order by fourth order Adams-Bashforth-Moultn method. An artificial damping layer is adopted on the free surface to avoid the wave reflection. The mooring-line/tendon/riser dynamics are based on the rod theory and the finite element method (FEM), with the governing equations described in a global coordinate system. In the coupled dynamic analysis, the motion equation for the hull and dynamic equations for mooring-lines/tendons/risers are solved simultaneously using the Newmark method. The coupled analysis program is applied for a truss Spar motion response simulation. Numerical results including motions and tensions at the top of mooring-lines/risers are presented, and some significant conclusions are derived.
机译：开发了完整的时域分析程序，用于海上结构的耦合动力分析。对于流体动力载荷，发展了时域二阶方法。在这种方法中，将泰勒级数展开应用于体表和自由表面的边界条件，然后使用斯托克斯摄动过程建立与时间无关的边界的相应边界值问题。发展了一种高阶边界元方法（HOBEM），以计算每个时间步长所得流场的速度势。自由表面边界条件通过四阶Adams-Bashforth-Moultn方法满足二阶要求。在自由表面上采用了人工阻尼层，以避免波反射。系泊索/肌腱/立管动力学基于杆理论和有限元方法（FEM），并在全局坐标系中描述了控制方程。在耦合动力分析中，使用Newmark方法同时求解船体的运动方程和系泊缆线/腱/竖板的动力学方程。耦合分析程序用于桁架Spar运动响应仿真。给出了包括系泊索/立管顶部的运动和张力在内的数值结果，并得出了一些重要的结论。

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  • 来源
    《Ocean Engineering》 |2012年第1期|p.72-87|共16页
  • 作者

    M. Yang; B. Teng; D. Ning; Z. Shi;

  • 作者单位

    State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;

    State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;

    State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;

    Technology Research Department, China National Offshore Oil Corporation, Beijing 100027, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    time-domain; higher-order boundary element method; mooring-line; finite element; coupled dynamic analysis;

    机译：时域高阶边界元法系泊缆有限元;耦合动力学分析;

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