标准型半潜式支持平台生存海况下系泊系统方案优化

Optimization of Mooring System Scheme for Standard Semi-Submersible Support Platform Under Survival Sea Conditions

半潜式支持平台恶劣海况下系泊方案的设计优化对平台的安全性和经济性有重要意义。以标准型半潜式平台为研究对象,基于墨西哥湾海况设计一套适用于1500 m水深的八点悬链式锚泊定位系统,分析各方向系泊缆的受力,发现在0°环境载荷下,4号缆和5号缆受力最大;又分别研究了系泊缆顶端张角、各段成分的直径和长度分配、系泊缆之间的布置角度等因素对系泊缆顶端张力的影响,以系泊缆顶端张力为优化目标,给出了系泊系统方案的优化建议。

The design optimization of mooring scheme for semi-submersible support platform under rough sea conditions is of great significance to the safety and economy of the platform.Taking a standard semi-submersible platform as the research object,based on the sea conditions in the Gulf of Mexico,a set of eight-point catenary anchor positioning system suitable for 1,500 m water depth is designed.The forces on mooring lines in various directions are analyzed.It is found that under 0°environmental load,the forces on No.4 and No.5 cables are the largest.The effects of factors such as the top tension angle of the mooring line,the diameter and length distribution of each segment,and the arrangement angle between the mooring lines on the top tension of the mooring line are also studied.Taking the top tension of the mooring line as the optimization goal,suggestions for optimizing the mooring system scheme are given.