Experimental observation of a near-motion-trapped mode: free motion in heave with negligible radiation
A simple geometry which exhibits near-motion-trapping is tested experimentally, along with perturbed versions of the structure. The motion of the freely floating structure and the surrounding wave field is tracked and the near-motion-trapped mode is found, characterised by a slowly decaying heave mo...
| Main Authors: | , , , , , |
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| Format: | Journal article |
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Cambridge University Press
2016
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| _version_ | 1826306775942430720 |
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| author | Wolgamot, H Taylor, P Taylor, R van den Bremer, T Raby, A Whittaker, C |
| author_facet | Wolgamot, H Taylor, P Taylor, R van den Bremer, T Raby, A Whittaker, C |
| author_sort | Wolgamot, H |
| collection | OXFORD |
| description | A simple geometry which exhibits near-motion-trapping is tested experimentally, along with perturbed versions of the structure. The motion of the freely floating structure and the surrounding wave field is tracked and the near-motion-trapped mode is found, characterised by a slowly decaying heave motion with very small linear radiation of energy. It is found that the latter property is a better discriminator of the perturbed geometries as viscous damping masks fine differences in radiation damping as far the motion of the structure is concerned. The magnitude of this viscous damping is reasonably well predicted by a simple Stokes oscillatory boundary layer analysis. |
| first_indexed | 2024-03-07T06:53:02Z |
| format | Journal article |
| id | oxford-uuid:fd2d2c7f-6720-436a-bb6f-2ccc1950cf0c |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:53:02Z |
| publishDate | 2016 |
| publisher | Cambridge University Press |
| record_format | dspace |
| spelling | oxford-uuid:fd2d2c7f-6720-436a-bb6f-2ccc1950cf0c2022-03-27T13:26:55ZExperimental observation of a near-motion-trapped mode: free motion in heave with negligible radiationJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:fd2d2c7f-6720-436a-bb6f-2ccc1950cf0cSymplectic Elements at OxfordCambridge University Press2016Wolgamot, HTaylor, PTaylor, Rvan den Bremer, TRaby, AWhittaker, CA simple geometry which exhibits near-motion-trapping is tested experimentally, along with perturbed versions of the structure. The motion of the freely floating structure and the surrounding wave field is tracked and the near-motion-trapped mode is found, characterised by a slowly decaying heave motion with very small linear radiation of energy. It is found that the latter property is a better discriminator of the perturbed geometries as viscous damping masks fine differences in radiation damping as far the motion of the structure is concerned. The magnitude of this viscous damping is reasonably well predicted by a simple Stokes oscillatory boundary layer analysis. |
| spellingShingle | Wolgamot, H Taylor, P Taylor, R van den Bremer, T Raby, A Whittaker, C Experimental observation of a near-motion-trapped mode: free motion in heave with negligible radiation |
| title | Experimental observation of a near-motion-trapped mode: free motion in heave with negligible radiation |
| title_full | Experimental observation of a near-motion-trapped mode: free motion in heave with negligible radiation |
| title_fullStr | Experimental observation of a near-motion-trapped mode: free motion in heave with negligible radiation |
| title_full_unstemmed | Experimental observation of a near-motion-trapped mode: free motion in heave with negligible radiation |
| title_short | Experimental observation of a near-motion-trapped mode: free motion in heave with negligible radiation |
| title_sort | experimental observation of a near motion trapped mode free motion in heave with negligible radiation |
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