Effects of Strake Coverage and Marine Growth on Flexible Cylinder Vortex-Induced Vibrations
This paper presents some results from the recent SHELL tests at the MARINTEK basin. The tests involved towing densely instrumented flexible cylinders at Reynolds numbers up to 220,000. The main objective is to present the experimental results describing the effectiveness of different amounts of stra...
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| Format: | Article |
| Language: | en_US |
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ASME International
2017
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| Online Access: | http://hdl.handle.net/1721.1/109247 https://orcid.org/0000-0002-5664-103X https://orcid.org/0000-0002-6144-660X |
| _version_ | 1826191798940205056 |
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| author | Resvanis, Themistocles L Rao, Zhibiao Vandiver, John Kim |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Resvanis, Themistocles L Rao, Zhibiao Vandiver, John Kim |
| author_sort | Resvanis, Themistocles L |
| collection | MIT |
| description | This paper presents some results from the recent SHELL tests at the MARINTEK basin. The tests involved towing densely instrumented flexible cylinders at Reynolds numbers up to 220,000. The main objective is to present the experimental results describing the effectiveness of different amounts of strake coverage and to explore the influence of simulated marine growth. The data are presented in terms of cross-flow (CF) response amplitudes and rainflow-counted damage rates due to the combined CF and in-line (IL) bending stresses. All the results are compared with the bare cylinder cases which will be used as a reference to determine how effective the strakes are in suppressing vortex-induced vibrations (VIV) and how this effectiveness can be affected by marine growth. The results show that even small bare sections (missing strakes) can lead to significant VIV response. Finally, the tests revealed that even moderate amounts of marine growth can quickly negate any suppression coming from the strakes. |
| first_indexed | 2024-09-23T09:01:47Z |
| format | Article |
| id | mit-1721.1/109247 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:01:47Z |
| publishDate | 2017 |
| publisher | ASME International |
| record_format | dspace |
| spelling | mit-1721.1/1092472022-09-26T09:57:49Z Effects of Strake Coverage and Marine Growth on Flexible Cylinder Vortex-Induced Vibrations Resvanis, Themistocles L Rao, Zhibiao Vandiver, John Kim Massachusetts Institute of Technology. Department of Mechanical Engineering Resvanis, Themistocles L Rao, Zhibiao Vandiver, John Kim This paper presents some results from the recent SHELL tests at the MARINTEK basin. The tests involved towing densely instrumented flexible cylinders at Reynolds numbers up to 220,000. The main objective is to present the experimental results describing the effectiveness of different amounts of strake coverage and to explore the influence of simulated marine growth. The data are presented in terms of cross-flow (CF) response amplitudes and rainflow-counted damage rates due to the combined CF and in-line (IL) bending stresses. All the results are compared with the bare cylinder cases which will be used as a reference to determine how effective the strakes are in suppressing vortex-induced vibrations (VIV) and how this effectiveness can be affected by marine growth. The results show that even small bare sections (missing strakes) can lead to significant VIV response. Finally, the tests revealed that even moderate amounts of marine growth can quickly negate any suppression coming from the strakes. SHEAR7 JIP 2017-05-22T15:23:12Z 2017-05-22T15:23:12Z 2016-06 2016-05 Article http://purl.org/eprint/type/ConferencePaper 0892-7219 http://hdl.handle.net/1721.1/109247 Resvanis, Themistocles L., Zhibiao Rao, and J. Kim Vandiver. “Effects of Strake Coverage and Marine Growth on Flexible Cylinder Vortex-Induced Vibrations 1.” Journal of Offshore Mechanics and Arctic Engineering 138, no. 5 (June 27, 2016): 051801. https://orcid.org/0000-0002-5664-103X https://orcid.org/0000-0002-6144-660X en_US http://dx.doi.org/10.1115/1.4033821 Journal of Offshore Mechanics and Arctic Engineering Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf ASME International American Society of Mechanical Engineers (ASME) |
| spellingShingle | Resvanis, Themistocles L Rao, Zhibiao Vandiver, John Kim Effects of Strake Coverage and Marine Growth on Flexible Cylinder Vortex-Induced Vibrations |
| title | Effects of Strake Coverage and Marine Growth on Flexible Cylinder Vortex-Induced Vibrations |
| title_full | Effects of Strake Coverage and Marine Growth on Flexible Cylinder Vortex-Induced Vibrations |
| title_fullStr | Effects of Strake Coverage and Marine Growth on Flexible Cylinder Vortex-Induced Vibrations |
| title_full_unstemmed | Effects of Strake Coverage and Marine Growth on Flexible Cylinder Vortex-Induced Vibrations |
| title_short | Effects of Strake Coverage and Marine Growth on Flexible Cylinder Vortex-Induced Vibrations |
| title_sort | effects of strake coverage and marine growth on flexible cylinder vortex induced vibrations |
| url | http://hdl.handle.net/1721.1/109247 https://orcid.org/0000-0002-5664-103X https://orcid.org/0000-0002-6144-660X |
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