Effect of Higher Stress Harmonics and Spectral Width on Fatigue Damage of Marine Risers
Recently, experimental data from vortex induced vibrations (VIV) of long flexible cylinders have revealed the existence of (i) higher harmonic stress components, and (ii) chaotic response characteristics, in addition to the well-known first harmonic responses. To assess the effect of these phenomena...
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ftmit:oai:dspace.mit.edu:1721.1/119894 2023-06-11T04:07:31+02:00 Effect of Higher Stress Harmonics and Spectral Width on Fatigue Damage of Marine Risers Modarres-Sadeghi, Y. Triantafyllou, Michael S Price, Rachel Elizabeth Zheng, Haining Massachusetts Institute of Technology. Department of Mechanical Engineering Triantafyllou, Michael S Price, Rachel Elizabeth Zheng, Haining 2019-01-04T18:46:30Z application/pdf http://hdl.handle.net/1721.1/119894 unknown ASME International http://dx.doi.org/10.1115/OMAE2011-49728 Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore, and Arctic Engineering 978-0-7918-4439-7 http://hdl.handle.net/1721.1/119894 Price, R., H. Zheng, Y. Modarres-Sadeghi, and M. S. Triantafyllou. “Effect of Higher Stress Harmonics and Spectral Width on Fatigue Damage of Marine Risers.” Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore, and Arctic Engineering, 19-24 June, 2011, Rotterdam, The Netherlands, ASME, 2011. orcid:0000-0002-4960-7060 orcid:0000-0002-2927-6612 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. ASME Article http://purl.org/eprint/type/ConferencePaper 2019 ftmit https://doi.org/10.1115/OMAE2011-49728 2023-05-29T07:27:42Z Recently, experimental data from vortex induced vibrations (VIV) of long flexible cylinders have revealed the existence of (i) higher harmonic stress components, and (ii) chaotic response characteristics, in addition to the well-known first harmonic responses. To assess the effect of these phenomena on fatigue damage of long flexible structures, we generate alternative stress time series, with and then without higher harmonic components; as well as time series, which have either sharply peaked power spectral densities (PSD), or broad-banded PSDs, characteristic of chaotic response. We show that for stresses containing higher harmonics, the predicted fatigue damage to the riser can increase by a factor of 2.5 relative to the damage caused by stresses containing only the first harmonic and having equivalent total power. Likewise, for stresses with a significantly spread PSD, an indicator of chaotic response, the damage to the riser is increased by a factor of 1.8, relative to a stress with narrow-band PSD and the same total power. Thus, it is found that the increase in fatigue damage caused by chaotic response can be as significant as that caused by the stress higher harmonic components. Topics: Stress , Fatigue damage , Marine drilling risers Nicolas G. and Dorothea K. Dumbros Scholarship and Fellowship Fund Article in Journal/Newspaper Arctic DSpace@MIT (Massachusetts Institute of Technology) Volume 7: CFD and VIV; Offshore Geotechnics 493 500 |
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DSpace@MIT (Massachusetts Institute of Technology) |
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Recently, experimental data from vortex induced vibrations (VIV) of long flexible cylinders have revealed the existence of (i) higher harmonic stress components, and (ii) chaotic response characteristics, in addition to the well-known first harmonic responses. To assess the effect of these phenomena on fatigue damage of long flexible structures, we generate alternative stress time series, with and then without higher harmonic components; as well as time series, which have either sharply peaked power spectral densities (PSD), or broad-banded PSDs, characteristic of chaotic response. We show that for stresses containing higher harmonics, the predicted fatigue damage to the riser can increase by a factor of 2.5 relative to the damage caused by stresses containing only the first harmonic and having equivalent total power. Likewise, for stresses with a significantly spread PSD, an indicator of chaotic response, the damage to the riser is increased by a factor of 1.8, relative to a stress with narrow-band PSD and the same total power. Thus, it is found that the increase in fatigue damage caused by chaotic response can be as significant as that caused by the stress higher harmonic components. Topics: Stress , Fatigue damage , Marine drilling risers Nicolas G. and Dorothea K. Dumbros Scholarship and Fellowship Fund |
author2 |
Massachusetts Institute of Technology. Department of Mechanical Engineering Triantafyllou, Michael S Price, Rachel Elizabeth Zheng, Haining |
format |
Article in Journal/Newspaper |
author |
Modarres-Sadeghi, Y. Triantafyllou, Michael S Price, Rachel Elizabeth Zheng, Haining |
spellingShingle |
Modarres-Sadeghi, Y. Triantafyllou, Michael S Price, Rachel Elizabeth Zheng, Haining Effect of Higher Stress Harmonics and Spectral Width on Fatigue Damage of Marine Risers |
author_facet |
Modarres-Sadeghi, Y. Triantafyllou, Michael S Price, Rachel Elizabeth Zheng, Haining |
author_sort |
Modarres-Sadeghi, Y. |
title |
Effect of Higher Stress Harmonics and Spectral Width on Fatigue Damage of Marine Risers |
title_short |
Effect of Higher Stress Harmonics and Spectral Width on Fatigue Damage of Marine Risers |
title_full |
Effect of Higher Stress Harmonics and Spectral Width on Fatigue Damage of Marine Risers |
title_fullStr |
Effect of Higher Stress Harmonics and Spectral Width on Fatigue Damage of Marine Risers |
title_full_unstemmed |
Effect of Higher Stress Harmonics and Spectral Width on Fatigue Damage of Marine Risers |
title_sort |
effect of higher stress harmonics and spectral width on fatigue damage of marine risers |
publisher |
ASME International |
publishDate |
2019 |
url |
http://hdl.handle.net/1721.1/119894 |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ASME |
op_relation |
http://dx.doi.org/10.1115/OMAE2011-49728 Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore, and Arctic Engineering 978-0-7918-4439-7 http://hdl.handle.net/1721.1/119894 Price, R., H. Zheng, Y. Modarres-Sadeghi, and M. S. Triantafyllou. “Effect of Higher Stress Harmonics and Spectral Width on Fatigue Damage of Marine Risers.” Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore, and Arctic Engineering, 19-24 June, 2011, Rotterdam, The Netherlands, ASME, 2011. orcid:0000-0002-4960-7060 orcid:0000-0002-2927-6612 |
op_rights |
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. |
op_doi |
https://doi.org/10.1115/OMAE2011-49728 |
container_title |
Volume 7: CFD and VIV; Offshore Geotechnics |
container_start_page |
493 |
op_container_end_page |
500 |
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1768380688104423424 |