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Citation:
　Montasir Osman Ahmed,Anurag Yenduri and V. J. Kurian.Investigation on the Dynamic Responses of a Truss Spar Platform for Different Mooring Line Groups[J].Journal of Marine Science and Application,2015,(2):189-195.[doi:10.1007/s11804-015-1301-2]
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Investigation on the Dynamic Responses of a Truss Spar Platform for Different Mooring Line Groups

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Title:
Investigation on the Dynamic Responses of a Truss Spar Platform for Different Mooring Line Groups
Author(s):
Montasir Osman Ahmed;  Anurag Yenduri and V. J. Kurian
Affilations:
Author(s):
Montasir Osman Ahmed;  Anurag Yenduri and V. J. Kurian
Department of Civil Engineering, Universiti Teknologi PETRONAS, Tronoh, Perak 31750, Malaysia
Keywords:
mooring system;  mooring lines;  spar platform;  motion responses;  Newmark Beta method;  Morison equation;  quasi-static approach;  dynamic responses
分类号:
-
DOI:
10.1007/s11804-015-1301-2
Abstract:
The dynamic responses of any floating platform are dependent on the mass, stiffness and damping characteristics of the body as well as mooring system. Therefore, it is very essential to study the effect of individual contributions to the system that can finally help to economise their cost. This paper focuses on the effect of mooring stiffness on the responses of a truss spar platform, obtained by different grouping of lines. The study is part of our present researches on mooring systems which include the effect of line pretension, diameter and azimuth angles. The platform is modelled as a rigid body with three degrees-of-freedom and its motions are analyzed in time-domain using the implicit Newmark Beta technique. The mooring lines restoring force-excursion relationship is evaluated using a quasi-static approach. It is observed that the mooring system with lines arranged in less number of groups exhibits better performance in terms of the restoring forces as well as mean position of platform. However, the dynamic motions of platform remain unaffected for different line groups.

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Memo

Memo:
Received date: 2014-7-10                        Accepted date: 2014-12-4
Foundation item: Research fund by Universiti Teknologi PETRONAS.
Corresponding author: Montasir Osman Ahmed       E-mail:montasir.ahmedali@petronas.com.my
Last Update: 2016-06-24