Structural Design of a Semi-Submersible Platform with Water-Entrapment Plates Based on a Time-Domain Hydrodynamic Algorithm Coupled with Finite-Elements
Structural Design of a Semi-Submersible Platform with Water-Entrapment Plates Based on a Time-Domain Hydrodynamic Algorithm Coupled with Finite-Elements
复制标题
基于时域水动力算法与有限元耦合的半潜式集水板结构设计
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
D. Roddier
中科院分区：
文献类型：
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作者：
Alexia Aubault;C. Cermelli;D. Roddier
本文讨论了为开发超深水边际油田而设计的半潜式平台的结构分析。几何图形由三根垂直的矩形柱子和三个浮桥组成，大的水平裙板从柱子的底部向各个方向延伸。由于绕射辐射载荷和边缘的粘性效应，裙边受到显著的水动力。为了保证结构的完整性和船体重量的优化，对结构构件进行极限分析和疲劳分析是必要的。由于新的几何形状，导致最大应力水平的模式预计不同于传统的半潜式设计。采用系统的方法确定设计荷载工况。这项工作强调了进行全面的结构分析和水动力模型相结合的必要性，以便评估所有可能的破坏模式。
This paper discusses the structural analysis of a semi-submersible-type platform with heave plates at the base of each column, designed to develop marginal fields in ultra-deepwater. The geometry consists of three vertical rectangular columns and three pontoons with large horizontal skirts extending in all directions from the base of the columns. The skirts are subjected to significant hydrodynamic forces due to diffraction-radiation loads and viscous effects around their edges. Both extreme and fatigue analyzes of the structural members are necessary to ensure the integrity of the structure and the optimization of the hull weight. Due to the novel geometry, the modes resulting in the largest stress levels are expected to differ from conventional semisubmersible design. A systematic approach is implemented to determine the design load cases. This work highlights the necessity to run a comprehensive structural analysis combined with a hydrodynamic model in order to assess all possible failure modes.