An investigation into parametric roll resonance in regular waves using a partly non-linear numerical model


Ahmed, T.M., Hudson, D.A. and Temarel, P. (2010) An investigation into parametric roll resonance in regular waves using a partly non-linear numerical model. Ocean Engineering, 37, (14-15), 1307-1320. (doi:10.1016/j.oceaneng.2010.06.009).

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Description/Abstract

A partly non-linear time-domain numerical model is used for the prediction of parametric roll resonance in regular waves. The ship is assumed to be a system with four degrees of freedom, namely, sway, heave, roll and pitch. The non-linear incident wave and hydrostatic restoring forces/moments are evaluated considering the instantaneous wetted surface whereas the hydrodynamic forces and moments, including diffraction, are expressed in terms of convolution integrals based on the mean wetted surface. The model also accounts for non-potential roll damping expressed in an equivalent linearised form. Finally, the coupled equations of motion are solved in the time-domain referenced to a body fixed axis system.

This method is applied to a range of hull forms, a post-Panamax C11 class containership, a transom stern Trawler and the ITTC-A1 containership, all travelling in regular waves. Obtained results are validated by comparison with numerical/experimental data available in the literature. A thorough investigation into the influence of the inclusion of sway motion is conducted. In addition, for the ITTC-A1 containership, an investigation is carried out into the influence of tuning the numerical model by modifying the numerical roll added inertia to match that obtained from roll decay curves

Item Type: Article
ISSNs: 0029-8018 (print)
1873-5258 (electronic)
Keywords: parametric roll resonance, non-linear, regular waves, time-domain, transom stern trawler, modern containerships
Subjects: V Naval Science > V Naval Science (General)
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Fluid-Structure Interactions
ePrint ID: 166979
Date Deposited: 05 Nov 2010 10:10
Last Modified: 27 Mar 2014 19:18
URI: http://eprints.soton.ac.uk/id/eprint/166979

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