Global wave-induced loads in abnormal waves: comparison between experimental results and classification society rules
Global wave-induced loads in abnormal waves: comparison between experimental results and classification society rules
It is important to assess the consequences of ship encounters with abnormal waves due to the perceived dangers of such encounters. A starting point for this is the assessment of global loads, with a focus on examining how the design rules fare with respect to loads induced by abnormal wave encounters. This paper presents the results of an experimental investigation into the global wave induced loads experienced in a range of abnormal sea states. Results are obtained for a segmented, flexible backbone model of a typical naval frigate. Abnormal wave encounters result in a significant increase in the global wave-induced loads compared to the equivalent random sea, with slamming becoming considerably more severe. Through comparisons with the experimental measurements it is concluded that the design rules which allow for an extreme wave encounter provide a reasonable safety margin for the global loads in abnormal waves, although discrepancies occur towards the aft of the vessel. Further investigation of the amount and conditions in which the design rules may be exceeded by an abnormal wave encounter is required
498-515
Bennett, S.S.
6c2fda55-1416-4cfa-ab39-9f6eea640b95
Hudson, D.A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Temarel, P.
b641fc50-5c8e-4540-8820-ae6779b4b0cf
August 2014
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.
(2014)
Global wave-induced loads in abnormal waves: comparison between experimental results and classification society rules.
Journal of Fluids and Structures, 49, .
(doi:10.1016/j.jfluidstructs.2014.05.009).
Abstract
It is important to assess the consequences of ship encounters with abnormal waves due to the perceived dangers of such encounters. A starting point for this is the assessment of global loads, with a focus on examining how the design rules fare with respect to loads induced by abnormal wave encounters. This paper presents the results of an experimental investigation into the global wave induced loads experienced in a range of abnormal sea states. Results are obtained for a segmented, flexible backbone model of a typical naval frigate. Abnormal wave encounters result in a significant increase in the global wave-induced loads compared to the equivalent random sea, with slamming becoming considerably more severe. Through comparisons with the experimental measurements it is concluded that the design rules which allow for an extreme wave encounter provide a reasonable safety margin for the global loads in abnormal waves, although discrepancies occur towards the aft of the vessel. Further investigation of the amount and conditions in which the design rules may be exceeded by an abnormal wave encounter is required
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e-pub ahead of print date: 27 June 2014
Published date: August 2014
Organisations:
Fluid Structure Interactions Group
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Local EPrints ID: 371979
URI: http://eprints.soton.ac.uk/id/eprint/371979
ISSN: 0889-9746
PURE UUID: 291c8087-4c0e-46f9-905c-49985aeb4373
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Date deposited: 24 Nov 2014 10:03
Last modified: 15 Mar 2024 02:48
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S.S. Bennett
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