Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents
This paper presents a general theoretical reduced-order model capable of evaluating the multi-mode nonlinear dynamics of marine risers subject to uniform and sheared currents. The main objectives are to predict the vortex-induced vibration responses and parametrically compare between numerical and e...
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ftustrathclyde:oai:strathprints.strath.ac.uk:18595 2024-05-19T07:33:19+00:00 Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents Srinil, Narakorn O'Brien, Patrick Wiercigrocha, Marian 2010 text https://strathprints.strath.ac.uk/18595/ https://strathprints.strath.ac.uk/18595/6/strathprints018595.pdf en eng https://strathprints.strath.ac.uk/18595/6/strathprints018595.pdf Srinil, Narakorn <https://strathprints.strath.ac.uk/view/author/712203.html> and O'Brien, Patrick and Wiercigrocha, Marian (2010 <https://strathprints.strath.ac.uk/view/year/2010.html>) Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents. In: The 29th International Conference on Ocean, Offshore and Arctic Engineering <https://strathprints.strath.ac.uk/view/publications/The_29th_International_Conference_on_Ocean,_Offshore_and_Arctic_Engineering.html>, 2010-06-06 - 2010-06-11. Naval architecture. Shipbuilding. Marine engineering Engineering (General). Civil engineering (General) Conference or Workshop Item PeerReviewed 2010 ftustrathclyde 2024-04-23T23:47:52Z This paper presents a general theoretical reduced-order model capable of evaluating the multi-mode nonlinear dynamics of marine risers subject to uniform and sheared currents. The main objectives are to predict the vortex-induced vibration responses and parametrically compare between numerical and experimental results. The emphasis is placed on the analysis of cross-flow vibrations due to unsteady lift forces. The nonlinear equations governing riser axial/transversal motions are derived based on a top-tensioned beam model with typical pinned-pinned boundary conditions. The riser geometric nonlinearities owing to possible large dynamic displacements and multi-mode interactions are accounted for. To approximate the space-time varying lift force, the empirical hydrodynamic model, based on a nonlinear van der Pol wake oscillator with a distributed diffusive term, is used. A low-dimensional dynamic model and computationally-robust time-domain tool are then developed to evaluate the multi-mode fluid-riser interactions. These are very useful in dealing with large parametric studies involving varying system parameters. Conference Object Arctic University of Strathclyde Glasgow: Strathprints |
institution |
Open Polar |
collection |
University of Strathclyde Glasgow: Strathprints |
op_collection_id |
ftustrathclyde |
language |
English |
topic |
Naval architecture. Shipbuilding. Marine engineering Engineering (General). Civil engineering (General) |
spellingShingle |
Naval architecture. Shipbuilding. Marine engineering Engineering (General). Civil engineering (General) Srinil, Narakorn O'Brien, Patrick Wiercigrocha, Marian Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents |
topic_facet |
Naval architecture. Shipbuilding. Marine engineering Engineering (General). Civil engineering (General) |
description |
This paper presents a general theoretical reduced-order model capable of evaluating the multi-mode nonlinear dynamics of marine risers subject to uniform and sheared currents. The main objectives are to predict the vortex-induced vibration responses and parametrically compare between numerical and experimental results. The emphasis is placed on the analysis of cross-flow vibrations due to unsteady lift forces. The nonlinear equations governing riser axial/transversal motions are derived based on a top-tensioned beam model with typical pinned-pinned boundary conditions. The riser geometric nonlinearities owing to possible large dynamic displacements and multi-mode interactions are accounted for. To approximate the space-time varying lift force, the empirical hydrodynamic model, based on a nonlinear van der Pol wake oscillator with a distributed diffusive term, is used. A low-dimensional dynamic model and computationally-robust time-domain tool are then developed to evaluate the multi-mode fluid-riser interactions. These are very useful in dealing with large parametric studies involving varying system parameters. |
format |
Conference Object |
author |
Srinil, Narakorn O'Brien, Patrick Wiercigrocha, Marian |
author_facet |
Srinil, Narakorn O'Brien, Patrick Wiercigrocha, Marian |
author_sort |
Srinil, Narakorn |
title |
Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents |
title_short |
Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents |
title_full |
Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents |
title_fullStr |
Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents |
title_full_unstemmed |
Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents |
title_sort |
numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents |
publishDate |
2010 |
url |
https://strathprints.strath.ac.uk/18595/ https://strathprints.strath.ac.uk/18595/6/strathprints018595.pdf |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://strathprints.strath.ac.uk/18595/6/strathprints018595.pdf Srinil, Narakorn <https://strathprints.strath.ac.uk/view/author/712203.html> and O'Brien, Patrick and Wiercigrocha, Marian (2010 <https://strathprints.strath.ac.uk/view/year/2010.html>) Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents. In: The 29th International Conference on Ocean, Offshore and Arctic Engineering <https://strathprints.strath.ac.uk/view/publications/The_29th_International_Conference_on_Ocean,_Offshore_and_Arctic_Engineering.html>, 2010-06-06 - 2010-06-11. |
_version_ |
1799471387857911808 |