极端载荷下半潜式平台系泊方法及性能对比

以某深水半潜式平台为研究对象，针对1 400 m 工作水深的12点系泊系统，采用时域耦合分析方法对比分析南海某设计工况下张紧式系泊与悬链线式系泊平台的运动响应和系泊缆动力特性，进而研究极端载荷作用下受力最大的系泊缆断裂时二者的变化情况。结果表明：与悬链线式系泊相比，无论是完整状态抑或是破断状态，张紧式系泊均具有更好的系泊性能，但聚酯缆材料的刚度非线性程度较大。分析结果可为系泊系统的设计与选择提供参考。

Comparison on Mooring Methods and Performance of Semi-Submersible Platform Under Extreme Load

For a deep-water semi-submersible platform and a 12-point mooring system with a working depth of 1400 m, the time-domain coupling analysis method is applied to compare the motion response of the platform and the tension of the mooring lines of the taut mooring system with those of the catenary mooring system under certain design condition in the South China Sea. The changes of the platform motion response and mooring lines tension after mooring line breakage under extreme load are also analyzed. The result shows that compared with the catenary mooring, the taut mooring is of better mooring performance in both intact and broken states, but the nonlinear stiffness of the polyester cable material is obvious. The analysis results can provide reference for the design and selection of mooring system.