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首页> 外文会议>International Symposium on Deepwater Mooring Systems: Deepwater Mooring Systems: Concepts, Design, Analysis, and Materials; 20031002-20031003; Houston,TX; US >A Numerical Code (COUPLE6D) for Coupled Dynamic Analysis of Moored Offshore Structures
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A Numerical Code (COUPLE6D) for Coupled Dynamic Analysis of Moored Offshore Structures

机译：系泊海上结构耦合动力分析的数值代码（COUPLE6D）

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摘要

A numerical code (COUPLE) has been developed for computing 6 Degree-Of-Freedom (DOF) motions of a moored floating structure dynamically interacting with its mooring/riser/tendon system. The computation of potential wave load on a moored structure can be conducted based on a diffraction wave theory, e.g. WAMIT, or the Morison Equation based upon a slender body assumption. In-line drag and transverse force caused by currents and wave induced particle velocity are computed using a modified Morison Equation. Wave kinematics up to the free surface used in the Morison Equation is computed using nonlinear deterministic Hybrid Wave Models, and is accurate up to second order in wave steepness. Wind forces are computed based on empirical formula suggested by the related API recommendation. Dynamics of the mooring/riser/tendon system is computed based on the slender-body assumption and a nonlinear Finite Element Method (FEM), known as CABLE3D. The original CABLE3D assumed infinitesimal elongation of a slender rod. Because large elongation slender rods, such as springs and synthetic ropes, are often used in either a mooring-line model test or a prototype mooring system in deep water, CABLE3D was extended to allow for large elongation elements in a mooring line to achieve accurate simulation. More recently, CABLE3D was also extended to allow for the interaction between a mooring line and its anchor' foundation. COUPLE6D has been applied to the study of moored classic Spars and mini TLP. Comparisons with the measurements of the corresponding model tests indicate it is a reliable and effective tool for the study of a floating offshore structures dynamically interacting with its mooring/riser/tendon system.
机译：已经开发了用于计算系泊浮动结构与其系泊/竖板/肌腱系统相互作用的6自由度（DOF）运动的数字代码（COUPLE）。系泊结构上的势波载荷的计算可以基于衍射波理论来进行，例如衍射波理论。 WAMIT或基于细长物体假设的Morison方程。使用修正的Morison方程计算由电流和波感应粒子速度引起的轴向阻力和横向力。使用非线性确定性混合波模型来计算直至在Morison方程中使用的自由表面的波运动学，并且在波陡度方面精确到二阶。风力是根据相关API建议中建议的经验公式计算得出的。系泊/提升/肌腱系统的动力学是基于细长体假设和称为CABLE3D的非线性有限元方法（FEM）计算的。原始的CABLE3D假定细长杆的伸长最小。由于大型伸长细长杆（例如弹簧和合成绳）经常用于深水系泊缆线模型测试或原型系泊系统中，因此对CABLE3D进行了扩展以允许系泊缆绳中有较大的伸长元件，以实现精确的模拟。最近，CABLE3D也进行了扩展，以允许系泊缆线与其锚基础之间的相互作用。 COUPLE6D已应用于系泊经典Spars和微型TLP的研究。与相应的模型测试的测量结果的比较表明，它是研究浮动式海上结构与其系泊/提升/肌腱系统相互作用的可靠且有效的工具。

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