Hydroelastic loading and response of ultra large container ships

Senjanović, Ivo and Vladimir, Nikola and Malenica, Šime (2012) Hydroelastic loading and response of ultra large container ships. = Hydroelastic loading and response of ultra large container ships. In: 22nd International Offshore and Polar Engineering Conference, ISOPE-2012, 17-22.06.2012., Rhodes; Greece.

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Official URL: http://bib.irb.hr/prikazi-rad?rad=585001


The importance of mathematical models for ship hydroelastic analysis grows with the design of ever larger container ships which have specific design and exploitation characteristics. Compared with other merchant ships, they are characterized by relatively lower torsional stiffness, which in combination with encounter sea states related to their higher speed of approximately 27 knots can cause resonance effects. This paper is based on research activities and results of the EU FP7 project Tools for Ultra Large Container Ships (TULCS), with particular emphasis to the part which deals with global hydroelastic loading and response. Special attention is paid to beam structural model based on the advanced beam theory. It includes shear influence on both bending and torsion, contribution of transverse bulkheads to hull stiffness as well as an appropriate modelling procedure of relatively short engine room structure. Along with that, hydrodynamic model is presented in condensed form. Further on, fully consistent formulation of restoring stiffness which plays important role in the hydrostatic model is described. Theoretical contributions are illustrated within the numerical example which includes complete hydroelastic analysis of a 11400 TEU container ship. The validation of advanced beam model is checked by correlation analysis with the vibration response of the fine 3D FEM model. Finally, ship hydroelastic response assessed by sophisticated beam model is compared with the results of fully coupled 3D FEM + 3D BEM hydroelastic analysis. The obtained transfer functions of sectional forces confirm that the developed model is very useful numerical tool for the designer and represents a reasonable choice for determining wave load effects on ULCS, in early design stage. Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE).

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): 3D FEM model; Beam model; Beam theories; Condensed form; Container ships; Correlation analysis; Developed model; Early design stages; Effective stiffness; Engine rooms; Fully-coupled; Hull stiffness; Hydro-elastic analysis; Hydrodynamic model; Hydroelastic; Hydroelastic response; Hydrostatic model; Merchant ships; Modal approach; Numerical example; Numerical tools; Project tools; Research activities; Resonance effect; Sea state; Specific design; Structural models; Torsional stiffness; Transverse bulkhead; Ultra large container ships; Vibration response; Wave load; Design; Finite element method; Hydrodynamics; Hydroelasticity; Linear motors; Loading; Mathematical models; Model structures; Numerical analysis; Ocean currents; Ships; Stiffness; Three dimensional
Divisions: 600 Department of Naval Engineering and Marine Technology > 620 Chair of Marine Structures Design
600 Department of Naval Engineering and Marine Technology > 650 Chair of Marine Machinery and System Design
Indexed in Web of Science: No
Indexed in Current Contents: No
Citations SCOPUS: 2 (26.10.2017.)
Date Deposited: 29 Apr 2015 12:35
Last Modified: 26 Oct 2017 12:52
URI: http://repozitorij.fsb.hr/id/eprint/3926

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