Poboljšani model krutosti poliesterskih sidrenih linija

Čorić, Većeslav and Ćatipović, Ivan and Radanović, Jadranka (2011) Poboljšani model krutosti poliesterskih sidrenih linija. = An Improved Stiffness Model for Polyester Mooring Lines. Brodogradnja : časopis brodogradnje i brodograđevne industrije, 62 (3). pp. 235-248. ISSN 0007-215X. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q4 (2011). Točan broj autora: 3.

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Abstract

The stiffness model of highly extensible polyester mooring lines is studied. Mooring lines are considered within coupled dynamic model of a moored floating object. In more detail, deepwater mooring with taut polyester mooring lines is observed. In this case mooring line is modelled as an extensible cable without bending and torsional stiffness. Movements are assumed to be three-dimensional, so it is necessary to examine large displacement model. In longitudinal deformation calculation material of the mooring line is considered as nonlinear. A large extension value is examined within the stiffness model. Inertial forces of the mooring line are also considered. Hydrodynamic loads due to surrounding fluid are taken into account with Morison equation. Due to nonlinear properties of mooring lines calculations has to be done in time domain. On these assumptions, derivation of a mooring line finite element is presented for static and dynamic analysis. A floating object is modelled as a rigid body with six degrees of freedom and with small displacements assumption. Hydrodynamic coefficients are calculated in a specified frequency domain ; therefore, mapping from the frequency to the time domain is necessary. Comparison between the improved model developed in this paper and current equivalent model is done. Simple mooring line that can be analytically described was base for comparison. The improved model achieved better agreement with the analytical result.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): coupled model, dynamic response, finite element method, large elongation value, mooring, time domain, polyester rope
Subjects: TECHNICAL SCIENCE > Shipbuilding
TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 600 Department of Naval Engineering and Marine Technology > 630 Chair of Ship Design and Offshore Technology
Indexed in Web of Science: Yes
Indexed in Current Contents: No
Citations JCR: 3 (17.10.2017.)
Quartiles: Q4 (2011)
Citations SCOPUS: 4 (17.10.2017.)
Date Deposited: 04 Dec 2014 11:15
Last Modified: 17 Oct 2017 13:32
URI: http://repozitorij.fsb.hr/id/eprint/3107

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