极端波浪条件下浅水系泊线张力陡增及应对方案  

Abrupt Increase of Mooring Line Tension in Shallow Waters Under Extreme Waves and its Countermeasures

作　　者：王德志 王俊荣 宮浩男 朱魁星 WANG Dezhi;WANG Junrong;GONG Haonan;ZHU Kuixing(College of Engineering,Ocean University of China,Qingdao 266100,Shandong,China;Shandong Key Laboratory of Ocean Engineering,Qingdao 266100,Shandong,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]山东省海洋工程重点实验室,山东青岛266100

出　　处：《中国海洋平台》2022年第3期8-16,共9页China offshore Platform

基　　金：国家自然科学基金(编号:51879287)。

摘　　要：针对浅水条件下系泊刚度过大、在极端海况下容易出现系泊线张力陡增的问题,采用数值计算方法,研究系泊线张力陡增成因,分析2种水深下系泊线躺底段长度变化对半潜式平台最大水平偏移和系泊线最大张力的影响,并考虑海床参数对系泊系统响应特征的影响。结果表明:在浅水系泊中,系泊刚度过大及强非线性是导致系泊线张力陡增的重要原因;增加系泊线躺底段长度、减小系泊线轴向刚度,可有效改变和优化系泊系统水平方向总刚度,减小系泊线张力陡增幅值。优化系泊线躺底段长度的方案可用于浮式平台的浅水系泊系统。Aiming at the problem that the mooring stiffness is too large in shallow water and the mooring line tension tends to increase sharply in extreme sea conditions,by the numerical method,the cause of the abrupt increase of the mooring line tension is studied,and the influence of the groundline length of the mooring line on the maximum horizontal offset and the maximum tension of the mooring line of a semi-submersible platform under two different water depths is analyzed.The influence of seabed parameters on the response characteristics of the mooring system is considered.The results show that:the excessive mooring stiffness and strong nonlinearity are the important reasons for the abrupt increase of the mooring line tension in shallow waters;increasing the length of the groundline of the mooring line can reduce the axial stiffness,effectively change and optimize the total horizontal stiffness of the mooring system,and reduce the mooring line tension amplitude.The scheme to optimize the groundline length of the mooring line can be applied to moored floaters in shallow waters.

关 键 词：系泊线张力 水平偏移 躺底段长度 半潜式平台 系泊系统 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]