Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-11-02

Journal: SHIPS AND OFFSHORE STRUCTURES

Included Journals: EI、SCIE

Volume: 9

Issue: 6

Page Number: 557-568

ISSN: 1744-5302

Key Words: equivalent mooring system; truncated mooring system; damping characteristic; optimised design; static characteristics

Abstract: An innovative approach is developed to design equivalent truncated mooring system for hybrid model testing. Considering the gravity, tension, current force and mooring line extension, the piecewise extrapolating method is employed to the static analysis of the multi-component mooring line. In addition, the quasi-static approach and dissipated energy model are used to figure out the mooring-induced damping of mooring system. Employing genetic algorithm, an optimised design program is developed to design equivalent truncated mooring system based on the similarity of both static and damping characteristics. Considering the catenary, semi-taut and taut mooring systems used for some semi-submersible platform of 1500m water depths, equivalent truncated mooring system is designed by using the design program in this paper, respectively. The results prove that the design program is available for all common types of deep water mooring system and can be used for hybrid model testing.