Influence and optimization of mooring angle in multi-point mooring positioning system

et a（l 61） HAN Sen，JIA Baozhu，SUN Wenzheng，

HAN Sen，JIA Baozhu，SUN Wenzheng，GU Yiming Marine Engineering College，Dalian Maritime University，Dalian 116026，China In this paper, a method for calculating the static restoring force of a mooring system is proposed in order to optimize the mooring angle and meet the strength requirements of mooring lines.［Methods］Using this method，a study is conducted on the influence of the mooring angle on the static restoring force and heading of the platform，and the tension uniformity of all mooring lines. An improved Genetic Algorithm （GA） is used to optimize the mooring angle，and the accuracy of the algorithm is enhanced in two ways：the first is that it can generate the initial population artificially by analyzing the influence of three factors（value of static restoring force，sensitivity of static restoring force to interference direction，and tension uniformity of all mooring lines）；the second is that it strengthens the local search ability by combining an adaptive algorithm.［Results］ The results show that the improved genetic algorithm has a higher optimization accuracy. The optimized results are fed back to the tension model of the mooring system，and the breaking strength requirements of the mooring lines are appropriately reduced.［Conclusions］This research can provide valuable references for mooring layout design and the material selection of mooring lines. positioning system；Genetic Algorithm（GA）；static restoring force；mooring angle

Abstract：［Objectives］ words：mooring Key

0引言

为避免海洋钻井平台在受到环境扰动后发生 位置漂移，需要配备能保证其在允许范围内变化的定位装置，如动力定位或锚泊定位系统，以确保其满足作业条件要求。其中，锚泊定位系统具有

收稿日期：2018 04 29 网络出版时间：2018-9-25 9:25基金项目：国家自然科学基金资助项目（51479017）；中央高校基本科研业务费专项资金资助项目（3132015210）作者简介：韩森，男，1992年生，硕士生。研究方向：船舶与海洋工程。E-mail：951665848@qq.com贾宝柱（通信作者），男，1974年生，博士，副教授。研究方向：船舶与海洋工程，自动控制。E-mail：skysky@dlmu.edu.cn