Inline-Crossflow Coupled Vortex Induced Vibrations of Long Flexible Cylinders
The inline motion of long flexible cylinders caused by Vortex Induced Vibrations (VIV) has been long neglected due to its small amplitude compared to the cross-flow response amplitude. However, the inline motion has a major impact on fatigue life due to its higher frequency (second harmonic) and mor...
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| Format: | Article |
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American Society of Mechanical Engineers
2019
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| Online Access: | http://hdl.handle.net/1721.1/120740 https://orcid.org/0000-0002-2927-6612 https://orcid.org/0000-0002-4960-7060 |
| _version_ | 1811088557872250880 |
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| author | Modarres-Sadeghi, Yahya Dahl, Jason Zheng, Haining Triantafyllou, Michael S |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Modarres-Sadeghi, Yahya Dahl, Jason Zheng, Haining Triantafyllou, Michael S |
| author_sort | Modarres-Sadeghi, Yahya |
| collection | MIT |
| description | The inline motion of long flexible cylinders caused by Vortex Induced Vibrations (VIV) has been long neglected due to its small amplitude compared to the cross-flow response amplitude. However, the inline motion has a major impact on fatigue life due to its higher frequency (second harmonic) and more importantly, because it triggers a third harmonic stress component in the crossflow direction along with a broad-band frequency stress component. We introduce an inline response prediction module to VIVA, a VIV response prediction program widely used in the offshore industry, to be able to consequently predict the higher harmonic and chaotic VIV response characteristics of flexible cylinders. Extensive forced inline and combined inline-crossflow experiments were employed to provide hydrodynamic coefficient databases for input to VIVA, in addition to existing crossflow hydrodynamic coefficients. The Norwegian Deepwater Programme (NDP) experimental data were used to validate this prediction methodology. |
| first_indexed | 2024-09-23T14:04:03Z |
| format | Article |
| id | mit-1721.1/120740 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T14:04:03Z |
| publishDate | 2019 |
| publisher | American Society of Mechanical Engineers |
| record_format | dspace |
| spelling | mit-1721.1/1207402022-10-01T18:58:19Z Inline-Crossflow Coupled Vortex Induced Vibrations of Long Flexible Cylinders Modarres-Sadeghi, Yahya Dahl, Jason Zheng, Haining Triantafyllou, Michael S Massachusetts Institute of Technology. Department of Mechanical Engineering Zheng, Haining Triantafyllou, Michael S The inline motion of long flexible cylinders caused by Vortex Induced Vibrations (VIV) has been long neglected due to its small amplitude compared to the cross-flow response amplitude. However, the inline motion has a major impact on fatigue life due to its higher frequency (second harmonic) and more importantly, because it triggers a third harmonic stress component in the crossflow direction along with a broad-band frequency stress component. We introduce an inline response prediction module to VIVA, a VIV response prediction program widely used in the offshore industry, to be able to consequently predict the higher harmonic and chaotic VIV response characteristics of flexible cylinders. Extensive forced inline and combined inline-crossflow experiments were employed to provide hydrodynamic coefficient databases for input to VIVA, in addition to existing crossflow hydrodynamic coefficients. The Norwegian Deepwater Programme (NDP) experimental data were used to validate this prediction methodology. BP-MIT Major Projects Program 2019-03-05T18:44:51Z 2019-03-05T18:44:51Z 2012-07 2019-01-04T19:04:22Z Article http://purl.org/eprint/type/ConferencePaper 978-0-7918-4492-2 http://hdl.handle.net/1721.1/120740 Zheng, Haining, Yahya Modarres-Sadeghi, Jason Dahl, and Michael S. Triantafyllou. “Inline-Crossflow Coupled Vortex Induced Vibrations of Long Flexible Cylinders.” ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, 1-8 July, 2012, Rio de Janeiro, Brazil, ASME, 2012. © 2012 ASME https://orcid.org/0000-0002-2927-6612 https://orcid.org/0000-0002-4960-7060 http://dx.doi.org/10.1115/OMAE2012-83492 ASME 2012 31st International Conference on Ocean, Offshore 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 American Society of Mechanical Engineers ASME |
| spellingShingle | Modarres-Sadeghi, Yahya Dahl, Jason Zheng, Haining Triantafyllou, Michael S Inline-Crossflow Coupled Vortex Induced Vibrations of Long Flexible Cylinders |
| title | Inline-Crossflow Coupled Vortex Induced Vibrations of Long Flexible Cylinders |
| title_full | Inline-Crossflow Coupled Vortex Induced Vibrations of Long Flexible Cylinders |
| title_fullStr | Inline-Crossflow Coupled Vortex Induced Vibrations of Long Flexible Cylinders |
| title_full_unstemmed | Inline-Crossflow Coupled Vortex Induced Vibrations of Long Flexible Cylinders |
| title_short | Inline-Crossflow Coupled Vortex Induced Vibrations of Long Flexible Cylinders |
| title_sort | inline crossflow coupled vortex induced vibrations of long flexible cylinders |
| url | http://hdl.handle.net/1721.1/120740 https://orcid.org/0000-0002-2927-6612 https://orcid.org/0000-0002-4960-7060 |
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