Numerical study on a hybrid mooring system with clump weights and buoys

OCEAN ENGINEERING

卷:88

Article

Yuan, Zhi-Ming¹  Incecik, Atilla¹  Ji, Chunyan² 

[1] Univ Strathclyde, Dept Naval Architecture Ocean & Marine Engn, Glasgow G4 0LZ, Lanark, Scotland

[2] Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212003, Peoples R China

关键词: Coupled analysis;    Time domain;    Hybrid mooring system;    Clump weights;    Buoys;   

DOI  :  10.1016/j.oceaneng.2014.06.002

来源: Elsevier

【 摘 要 】

A new hybrid mooring system based on the traditional taut mooring lines was proposed in the present study. A series of clump weights were attached to the lower end of each mooring line to form a catenary shape. Some buoys were connected to the upper ends of the lines to reduce the top tension on each mooring line. In order to verify the advantages of this new hybrid system, we investigated the motion responses of a semi-submersible platform moored by the proposed hybrid mooring system. The top tension on the lines was also calculated by using the time domain method. Comparing the results from the taut mooring system, it can be found that the tension on the lines could be reduced by using the present hybrid mooring system, while the motion responses were hardly influenced. Furthermore, a catenary shape was formed at the lower end of each mooring line, which could reduce the requirement of the anti-uplift capacity of the anchors. We also carried out the parametric study to investigate the optimal position and volume of the buoys. The discussions were highlighted on the influence of the water depth. Crown Copyright (C) 2014 Published by Elsevier Ltd. All rights reserved.

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