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A comparison of abnormal wave generation techniques for experimental modelling of abnormal wave-vessel interactions

A comparison of abnormal wave generation techniques for experimental modelling of abnormal wave-vessel interactions
A comparison of abnormal wave generation techniques for experimental modelling of abnormal wave-vessel interactions
The ability to model abnormal waves in an accurate and repeatable manner is important in order to achieve the objective of assessing vessel response in such conditions.

Although techniques for the practical generation of abnormal waves are readily available in literature, no comparison of their suitability to modelling abnormal waves experimentally is available. The purpose of this paper is to provide such a comparison. Identified techniques are the NewWave, constrained NewWave and optimised sea, all based on sea spectra. A particular focus is the usefulness of each technique for modelling a travelling vessel encountering an abnormal wave. Experimental results are presented for each model compared to linear and second order wave theories, and the quality of results is assessed using an uncertainty analysis.

Results demonstrate the constrained NewWave is highly repeatable, but suffers from discrepancies in the time domain when compared to predicted profiles. In order to generate a known wave profile, the NewWave or optimisation techniques appear the most suitable. Of these, NewWave should be used if only the local (abnormal) wave profile is required. To model a realistic scenario including the response history of a vessel, the optimised sea should be applied.
Abnormal waves, Rogue waves, Linear superposition, NewWave, constrained newwave, optimised sea, experimental modelling, wave–vessel interactions
0029-8018
34-48
Bennett, S.S.
6c2fda55-1416-4cfa-ab39-9f6eea640b95
Hudson, D.A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Temarel, P.
b641fc50-5c8e-4540-8820-ae6779b4b0cf
Bennett, S.S.
6c2fda55-1416-4cfa-ab39-9f6eea640b95
Hudson, D.A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Temarel, P.
b641fc50-5c8e-4540-8820-ae6779b4b0cf

Bennett, S.S., Hudson, D.A. and Temarel, P. (2012) A comparison of abnormal wave generation techniques for experimental modelling of abnormal wave-vessel interactions. Ocean Engineering, 51, 34-48. (doi:10.1016/j.oceaneng.2012.05.007).

Record type: Article

Abstract

The ability to model abnormal waves in an accurate and repeatable manner is important in order to achieve the objective of assessing vessel response in such conditions.

Although techniques for the practical generation of abnormal waves are readily available in literature, no comparison of their suitability to modelling abnormal waves experimentally is available. The purpose of this paper is to provide such a comparison. Identified techniques are the NewWave, constrained NewWave and optimised sea, all based on sea spectra. A particular focus is the usefulness of each technique for modelling a travelling vessel encountering an abnormal wave. Experimental results are presented for each model compared to linear and second order wave theories, and the quality of results is assessed using an uncertainty analysis.

Results demonstrate the constrained NewWave is highly repeatable, but suffers from discrepancies in the time domain when compared to predicted profiles. In order to generate a known wave profile, the NewWave or optimisation techniques appear the most suitable. Of these, NewWave should be used if only the local (abnormal) wave profile is required. To model a realistic scenario including the response history of a vessel, the optimised sea should be applied.

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e-pub ahead of print date: 12 June 2012
Published date: September 2012
Keywords: Abnormal waves, Rogue waves, Linear superposition, NewWave, constrained newwave, optimised sea, experimental modelling, wave–vessel interactions
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 337939
URI: https://eprints.soton.ac.uk/id/eprint/337939
ISSN: 0029-8018
PURE UUID: dfdd8908-48b2-4ec4-8723-fe9b7b21ade0
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

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Date deposited: 14 Jun 2012 12:38
Last modified: 06 Jun 2018 13:07

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Contributors

Author: S.S. Bennett
Author: D.A. Hudson ORCID iD
Author: P. Temarel ORCID iD

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