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High speed video analysis of freak wave-ship model experiments

High speed video analysis of freak wave-ship model experiments
High speed video analysis of freak wave-ship model experiments
The concept of freak waves is of importance to the maritime industry as freak wave-ship encounters can be severe, resulting in significant damage to, or loss of, the ship. Model scale testing of a ship in repeatable freak waves can be used to provide design information for the response of a ship in such conditions. The focus of this paper is the enhancement of traditional experimental data with video images to identify both the behaviour of a sea state prior to, and during, the formation of a freak wave, and the causes of severe ship responses in freak waves. Experiments were conducted using a flexible backbone model of a naval frigate, travelling at its service speed in a range of long-crested random seas which contain a freak wave. Video imagery was recorded via both a high speed camera at 200fps and a standard webcam at 30fps. Analysis of the obtained video was used to assess the phenomena (such as wave breaking) which occur during the evolution of the freak wave. Furthermore, violent flows related to the ship in freak waves (such as slamming events or green water on deck) are identified and the effect on the resultant ship responses assessed.
9782748390353
98-106
Publibook
Bennett, S.
6c2fda55-1416-4cfa-ab39-9f6eea640b95
Winden, B.
78f0bce6-9f1a-428c-bdc2-d044251790ba
Brooks, Christopher James
5c504fef-0360-4b2a-b6c4-d88bbd6e5bac
Turnock, Stephen
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Hudson, Dominic A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Le Touzé, David
Grenier, Nicolas
Barcarolo, Daniel A.
Bennett, S.
6c2fda55-1416-4cfa-ab39-9f6eea640b95
Winden, B.
78f0bce6-9f1a-428c-bdc2-d044251790ba
Brooks, Christopher James
5c504fef-0360-4b2a-b6c4-d88bbd6e5bac
Turnock, Stephen
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Hudson, Dominic A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Le Touzé, David
Grenier, Nicolas
Barcarolo, Daniel A.

Bennett, S., Winden, B., Brooks, Christopher James, Turnock, Stephen and Hudson, Dominic A. (2012) High speed video analysis of freak wave-ship model experiments. Le Touzé, David, Grenier, Nicolas and Barcarolo, Daniel A. (eds.) In 2nd International Conference on Violent Flows. Publibook. pp. 98-106 .

Record type: Conference or Workshop Item (Paper)

Abstract

The concept of freak waves is of importance to the maritime industry as freak wave-ship encounters can be severe, resulting in significant damage to, or loss of, the ship. Model scale testing of a ship in repeatable freak waves can be used to provide design information for the response of a ship in such conditions. The focus of this paper is the enhancement of traditional experimental data with video images to identify both the behaviour of a sea state prior to, and during, the formation of a freak wave, and the causes of severe ship responses in freak waves. Experiments were conducted using a flexible backbone model of a naval frigate, travelling at its service speed in a range of long-crested random seas which contain a freak wave. Video imagery was recorded via both a high speed camera at 200fps and a standard webcam at 30fps. Analysis of the obtained video was used to assess the phenomena (such as wave breaking) which occur during the evolution of the freak wave. Furthermore, violent flows related to the ship in freak waves (such as slamming events or green water on deck) are identified and the effect on the resultant ship responses assessed.

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More information

Published date: 2012
Venue - Dates: 2nd International Conference on Violent Flows, France, 2012-09-25 - 2012-09-27
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 345865
URI: https://eprints.soton.ac.uk/id/eprint/345865
ISBN: 9782748390353
PURE UUID: f7b5fcbf-fca2-4d78-b7d2-a13fb19a5870
ORCID for Stephen Turnock: ORCID iD orcid.org/0000-0001-6288-0400
ORCID for Dominic A. Hudson: ORCID iD orcid.org/0000-0002-2012-6255

Catalogue record

Date deposited: 05 Dec 2012 15:21
Last modified: 06 Jun 2018 13:14

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Contributors

Author: S. Bennett
Author: B. Winden
Author: Christopher James Brooks
Author: Stephen Turnock ORCID iD
Editor: David Le Touzé
Editor: Nicolas Grenier
Editor: Daniel A. Barcarolo

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