Improved methodology of ship hydroelastic analysis

Senjanović, Ivo and Hadžić, Neven and Vladimir, Nikola (2012) Improved methodology of ship hydroelastic analysis. = Improved methodology of ship hydroelastic analysis. In: 6th International Conference on Hydroelasticity in Marine Technology, 19-21.09.2012., Tokyo, Japan.

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Official URL: https://www.fsb.unizg.hr/tulcs/public/reports/impr...

Abstract

The paper presents improved methodology of ship hydroelasticity analysis, based on the modal superposition method and including structural, hydrostatic and hydrodynamic models. Structural beam model is used comprising a reliable advanced thin-walled girder theory taking into account shear influence on torsion as well as the contribution of bulkheads and the engine room structure, as structure discontinuities, to the ship hull stiffness. Consistent restoring stiffness is included in the analysis via hydrostatic model. Hydrodynamic loading and added mass and hydrodynamic damping are a part of the hydrodynamic model and are determined based on the radiation / diffraction theory. Also, the analysis of springing effect on the ship fatigue life is introduced using the combination of the improved hydroelastic model and 3D FEM substructure model. It is shown that the improved beam hydroelastic model can be efficiently used in the assessment of stress concentrations of ship structural details. Applicability of the developed theory is proved within global hydroelastic analysis of a 11400 TEU container ship as well as stress concentration determination in the selected structural detail.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Hydroelasticity, Improved beam model, Hydrodynamics, Restoring stiffness, Springing, Stress concentrations
Subjects: TECHNICAL SCIENCE > Shipbuilding
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
Date Deposited: 23 May 2016 11:08
Last Modified: 11 Oct 2016 11:52
URI: http://repozitorij.fsb.hr/id/eprint/5920

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