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Modal analysis of a small ship sea keeping trial

Modal analysis of a small ship sea keeping trial
Modal analysis of a small ship sea keeping trial
Data from sea keeping trials of a Scottish trawler are analyzed. The trawler sailed an octagonal course, each leg took over 20 minutes and data recorded twice a second. The natural frequencies of vibration for each of the six rigid body modes are estimated from the heave, surge, sway, pitch, yaw and roll time series. The time series are investigated for evidence of non-linearity. A time domain model is fitted to a roll time series, and second order amplitude response functions are then obtained using autoregressive estimators.
1446-8735
C915-C933
Metcalfe, A.
3fdf0984-6b87-43c1-95c0-536919983eef
Maurits, L.
3fe24119-7c51-4cbd-9dd6-5b0bb1b7bdbb
Svenson, T.
43738cc2-6a1b-48c3-ab74-04fdd47e2dd4
Thatch, R.
4f3eae76-deee-4308-b47b-32f2f78e2a42
Hearn, G.E.
c1b2912b-fe5c-432c-aaa4-39c5eff75178
Metcalfe, A.
3fdf0984-6b87-43c1-95c0-536919983eef
Maurits, L.
3fe24119-7c51-4cbd-9dd6-5b0bb1b7bdbb
Svenson, T.
43738cc2-6a1b-48c3-ab74-04fdd47e2dd4
Thatch, R.
4f3eae76-deee-4308-b47b-32f2f78e2a42
Hearn, G.E.
c1b2912b-fe5c-432c-aaa4-39c5eff75178

Metcalfe, A., Maurits, L., Svenson, T., Thatch, R. and Hearn, G.E. (2007) Modal analysis of a small ship sea keeping trial. Australian and New Zealand Industrial Applied Mathematics: ANZIAM Journal, 47 (EMAC2005), C915-C933.

Record type: Article

Abstract

Data from sea keeping trials of a Scottish trawler are analyzed. The trawler sailed an octagonal course, each leg took over 20 minutes and data recorded twice a second. The natural frequencies of vibration for each of the six rigid body modes are estimated from the heave, surge, sway, pitch, yaw and roll time series. The time series are investigated for evidence of non-linearity. A time domain model is fitted to a roll time series, and second order amplitude response functions are then obtained using autoregressive estimators.

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Published date: May 2007
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 49199
URI: http://eprints.soton.ac.uk/id/eprint/49199
ISSN: 1446-8735
PURE UUID: c527d341-b5a5-4188-b294-528c4502a6fc

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Date deposited: 24 Oct 2007
Last modified: 11 Dec 2021 16:53

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Contributors

Author: A. Metcalfe
Author: L. Maurits
Author: T. Svenson
Author: R. Thatch
Author: G.E. Hearn

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