On the non-linearities of ship’s restoring and the Froude-Krylov wave load part

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openAccess

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Journal Title

Journal ISSN

Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2011

Major/Subject

Mcode

Degree programme

Language

en

Pages

111-115

Series

INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING, Volume 3, issue 1

Abstract

When formulating a general, non-linear mathematical model of ship dynamics in waves the hydrostatic forces and moments along with the Froude-Krylov part of wave load are usually concerned. Normally radiation and the diffraction forces are regarded as linear ones. The paper discusses briefly few approaches, which can be used in this respect. The concerned models attempt to model the non-linearities of the surface waves; both regular and the irregular ones, and the non-linearities of the restoring forces and moments. The approach selected in the Laidyn method, which is meant for the evaluation of large amplitude motions in the 6 degrees-of-freedom, is presented in a bigger detail. The workability of the method is illustrated with the simulation of ship motions in irregular stern quartering waves.

Description

VK: T20404

Keywords

seakeeping, Froude-Krylov pressure, nonlinear restoring; stern quartering seas, seakeeping, Froude-Krylov pressures, Nonlinear restoring, Stern quartering seas

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Citation

Matusiak, J 2011, ' On the non-linearities of ship’s restoring and the Froude-Krylov wave load part ', International Journal of Naval Architecture and Ocean Engineering, vol. 3, no. 1, pp. 111-115 . https://doi.org/10.2478/IJNAOE-2013-0052