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Comparison of two numerical models for the prediction of parametric roll resonance in regular waves

Record type: Conference or Workshop Item (Paper)

In this paper, two non-linear time domain numerical methods are used for the prediction of parametric roll resonance in regular waves encountered at various headings. Method (I) is a 2.5-DoF model in heave, roll and pitch, where heave and pitch motions are evaluated simultaneously, and independently of roll and are based on the mean wetted surface. Sub-sequently, the 1-DoF equation of motion in roll is solved in the time domain, with parametric excitation terms accounted for as third order non-linearities, defined in terms of heave-pitch-wave profile coupling with roll. Method (II) is a 4-DoF model in sway, heave, roll and pitch. The non-linear incident wave and hydrostatic restoring forces/moments are evaluated considering the instantaneous waterline. The radiation/diffraction forces and moments are expressed in terms of convolution integrals through impulse response functions that are based on the mean wetted surface, using 3D potential flow analysis (pulsating source). Methods (I) and (II) are applied to the ITTC-A1 containership and are validated by comparison to ex-perimental data provided through the SAFEDOR Benchmark Study

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Citation

Ahmed, T.M., Hudson, D.A. and Temarel, P. (2010) Comparison of two numerical models for the prediction of parametric roll resonance in regular waves At PRADS 2010: 11th International Symposium on Practical Design of Ships and Other Floating Structures, Brazil. 10 pp.

More information

Published date: September 2010
Venue - Dates: PRADS 2010: 11th International Symposium on Practical Design of Ships and Other Floating Structures, Brazil, 2010-09-01
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 166991
URI: http://eprints.soton.ac.uk/id/eprint/166991
PURE UUID: 5777e680-b66e-4d87-8d5f-937d047178c9
ORCID for D.A. Hudson: ORCID iD orcid.org/0000-0002-2012-6255
ORCID for P. Temarel: ORCID iD orcid.org/0000-0003-2921-1242

Catalogue record

Date deposited: 08 Dec 2010 14:22
Last modified: 18 Jul 2017 12:25

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Contributors

Author: T.M. Ahmed
Author: D.A. Hudson ORCID iD
Author: P. Temarel ORCID iD

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