Coupled axial/lateral VIV of marine risers in sheared currents
Modelling and prediction of vortex-induced vibrations (VIV) of marine risers is a challenging task due to the associated multi degrees of freedom in both cross-flow/in-line directions and the multi-mode fluid-structure interactions. In addition, the axial motion and its geometrically nonlinear coupl...
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ftustrathclyde:oai:strathprints.strath.ac.uk:55000 2024-04-28T08:04:27+00:00 Coupled axial/lateral VIV of marine risers in sheared currents Zanganeh, Hossein Srinil, Narakorn 2015 https://strathprints.strath.ac.uk/55000/ https://doi.org/10.1115/OMAE2015-41606 unknown American Society of Mechanical Engineers (ASME) Zanganeh, Hossein <https://strathprints.strath.ac.uk/view/author/744234.html> and Srinil, Narakorn <https://strathprints.strath.ac.uk/view/author/712203.html>; (2015 <https://strathprints.strath.ac.uk/view/year/2015.html>) Coupled axial/lateral VIV of marine risers in sheared currents. In: Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE. American Society of Mechanical Engineers (ASME), CAN. ISBN 9780791856482 <https://strathprints.strath.ac.uk/view/isbn/9780791856482.html> Naval architecture. Shipbuilding. Marine engineering Book Section NonPeerReviewed 2015 ftustrathclyde https://doi.org/10.1115/OMAE2015-41606 2024-04-10T01:05:08Z Modelling and prediction of vortex-induced vibrations (VIV) of marine risers is a challenging task due to the associated multi degrees of freedom in both cross-flow/in-line directions and the multi-mode fluid-structure interactions. In addition, the axial motion and its geometrically nonlinear coupling with lateral responses can be significant, especially at higher-order modes. Nevertheless, several papers in the literature dealing with VIV predictions have often overlooked such aspects. Therefore, this study aims to investigate and understand the effect of axial or longitudinal motion through a theoretical model and numerical approach in time domain. Attention is paid to VIV of vertical risers subjected to linearly sheared currents. To capture a three-dimensional aspect of the flexible cylinder experiencing VIV, a semiempirical model is developed consisting of nonlinear equations of cross-flow, in-line and axial structural oscillations which are coupled with the distributed van der Pol-type wakeoscillators modelling the fluctuating fluid lift/drag forces. The mean drag force is also taken into account. These model equations are numerically solved via a space-time finite difference scheme, and the obtained numerical results highlight several aspects of VIV of elastic cylinders along with the axial motion effects. Apart from the validation of the numerical model with published experimental results, this study reveals how the effect of axial motion and its nonlinear coupling with the two lateral cross-flow/in-line motions can be very important. These depend on the flow velocity, the fluid-structure parameters, the single or multi-mode lock-in condition, and the standing-wave or travelling-wave feature. We recommend that the axial response should be accounted for in VIV analysis and prediction model. Book Part Arctic University of Strathclyde Glasgow: Strathprints Volume 2: CFD and VIV |
institution |
Open Polar |
collection |
University of Strathclyde Glasgow: Strathprints |
op_collection_id |
ftustrathclyde |
language |
unknown |
topic |
Naval architecture. Shipbuilding. Marine engineering |
spellingShingle |
Naval architecture. Shipbuilding. Marine engineering Zanganeh, Hossein Srinil, Narakorn Coupled axial/lateral VIV of marine risers in sheared currents |
topic_facet |
Naval architecture. Shipbuilding. Marine engineering |
description |
Modelling and prediction of vortex-induced vibrations (VIV) of marine risers is a challenging task due to the associated multi degrees of freedom in both cross-flow/in-line directions and the multi-mode fluid-structure interactions. In addition, the axial motion and its geometrically nonlinear coupling with lateral responses can be significant, especially at higher-order modes. Nevertheless, several papers in the literature dealing with VIV predictions have often overlooked such aspects. Therefore, this study aims to investigate and understand the effect of axial or longitudinal motion through a theoretical model and numerical approach in time domain. Attention is paid to VIV of vertical risers subjected to linearly sheared currents. To capture a three-dimensional aspect of the flexible cylinder experiencing VIV, a semiempirical model is developed consisting of nonlinear equations of cross-flow, in-line and axial structural oscillations which are coupled with the distributed van der Pol-type wakeoscillators modelling the fluctuating fluid lift/drag forces. The mean drag force is also taken into account. These model equations are numerically solved via a space-time finite difference scheme, and the obtained numerical results highlight several aspects of VIV of elastic cylinders along with the axial motion effects. Apart from the validation of the numerical model with published experimental results, this study reveals how the effect of axial motion and its nonlinear coupling with the two lateral cross-flow/in-line motions can be very important. These depend on the flow velocity, the fluid-structure parameters, the single or multi-mode lock-in condition, and the standing-wave or travelling-wave feature. We recommend that the axial response should be accounted for in VIV analysis and prediction model. |
format |
Book Part |
author |
Zanganeh, Hossein Srinil, Narakorn |
author_facet |
Zanganeh, Hossein Srinil, Narakorn |
author_sort |
Zanganeh, Hossein |
title |
Coupled axial/lateral VIV of marine risers in sheared currents |
title_short |
Coupled axial/lateral VIV of marine risers in sheared currents |
title_full |
Coupled axial/lateral VIV of marine risers in sheared currents |
title_fullStr |
Coupled axial/lateral VIV of marine risers in sheared currents |
title_full_unstemmed |
Coupled axial/lateral VIV of marine risers in sheared currents |
title_sort |
coupled axial/lateral viv of marine risers in sheared currents |
publisher |
American Society of Mechanical Engineers (ASME) |
publishDate |
2015 |
url |
https://strathprints.strath.ac.uk/55000/ https://doi.org/10.1115/OMAE2015-41606 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Zanganeh, Hossein <https://strathprints.strath.ac.uk/view/author/744234.html> and Srinil, Narakorn <https://strathprints.strath.ac.uk/view/author/712203.html>; (2015 <https://strathprints.strath.ac.uk/view/year/2015.html>) Coupled axial/lateral VIV of marine risers in sheared currents. In: Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE. American Society of Mechanical Engineers (ASME), CAN. ISBN 9780791856482 <https://strathprints.strath.ac.uk/view/isbn/9780791856482.html> |
op_doi |
https://doi.org/10.1115/OMAE2015-41606 |
container_title |
Volume 2: CFD and VIV |
_version_ |
1797575111077789696 |