Real-Time Hybrid Model Testing of a Top Tensioned Riser: a Numerical Case Study on Interface Time-Delays and Truncation Ratio
This paper investigates the applicability of real-time hybrid model testing (ReaTHM testing) to the study of offshore systems in deep water. The focus is in particular on slender marine structures connecting floating structures to the seabed, and on how they could be truncated so that a model test s...
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ftsintef:oai:sintef.brage.unit.no:11250/2459498 2023-05-15T14:23:58+02:00 Real-Time Hybrid Model Testing of a Top Tensioned Riser: a Numerical Case Study on Interface Time-Delays and Truncation Ratio Sauder, Thomas Michel Sørensen, Asgeir Johan Larsen, Kjell 2017 application/pdf http://hdl.handle.net/11250/2459498 https://doi.org/10.1115/OMAE2017-62498 eng eng ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 2: Prof. Carl Martin Larsen and Dr. Owen Oakley Honoring Symposia on CFD and VIV ASME 2017;OMAE2017-62498 Norges forskningsråd: 254845 ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering, Volume 2: Prof. Carl Martin Larsen and Dr. Owen Oakley Honoring Symposia on CFD and VIV urn:isbn:978-0-7918-5764-9 http://hdl.handle.net/11250/2459498 https://doi.org/10.1115/OMAE2017-62498 cristin:1503606 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no Copyright © 2017 by ASME CC-BY-NC-ND Testing Delays Top-tensioned risers Chapter 2017 ftsintef https://doi.org/10.1115/OMAE2017-62498 2021-08-04T11:59:58Z This paper investigates the applicability of real-time hybrid model testing (ReaTHM testing) to the study of offshore systems in deep water. The focus is in particular on slender marine structures connecting floating structures to the seabed, and on how they could be truncated so that a model test setup at a reasonable scale could fit existing hydrodynamic laboratory infrastructures. In this context, ReaTHM testing consists in “substructuring” the slender structures in two parts. At the lower part of the water column, the first substructure is numerical, simulated using a nonlinear finite element method. On the upper part of the water column, the other substructure is physically modelled in an ocean basin. Both substructures interact in real-time through a set of sensors and actuators. This paper addresses through a case study the important issue of accuracy of ReaTHM testing, that is how the behavior of the substructured system varies from that of the emulated system. A top-tensioned riser in 1200m water depth is considered, with two truncation locations: 240m and 600m below the free surface. It is assumed that an artefact is introduced by the ReaTHM test setup, namely a time delay induced by e.g. the numerical calculations, or the actuation system. It is first shown how this artefact influences the accuracy of the setup, and then how the truncation ratio influences the tolerance of the ReaTHM test setup to such an artefact. acceptedVersion Book Part Arctic SINTEF Open (Brage) Volume 2: Prof. Carl Martin Larsen and Dr. Owen Oakley Honoring Symposia on CFD and VIV |
institution |
Open Polar |
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SINTEF Open (Brage) |
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ftsintef |
language |
English |
topic |
Testing Delays Top-tensioned risers |
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Testing Delays Top-tensioned risers Sauder, Thomas Michel Sørensen, Asgeir Johan Larsen, Kjell Real-Time Hybrid Model Testing of a Top Tensioned Riser: a Numerical Case Study on Interface Time-Delays and Truncation Ratio |
topic_facet |
Testing Delays Top-tensioned risers |
description |
This paper investigates the applicability of real-time hybrid model testing (ReaTHM testing) to the study of offshore systems in deep water. The focus is in particular on slender marine structures connecting floating structures to the seabed, and on how they could be truncated so that a model test setup at a reasonable scale could fit existing hydrodynamic laboratory infrastructures. In this context, ReaTHM testing consists in “substructuring” the slender structures in two parts. At the lower part of the water column, the first substructure is numerical, simulated using a nonlinear finite element method. On the upper part of the water column, the other substructure is physically modelled in an ocean basin. Both substructures interact in real-time through a set of sensors and actuators. This paper addresses through a case study the important issue of accuracy of ReaTHM testing, that is how the behavior of the substructured system varies from that of the emulated system. A top-tensioned riser in 1200m water depth is considered, with two truncation locations: 240m and 600m below the free surface. It is assumed that an artefact is introduced by the ReaTHM test setup, namely a time delay induced by e.g. the numerical calculations, or the actuation system. It is first shown how this artefact influences the accuracy of the setup, and then how the truncation ratio influences the tolerance of the ReaTHM test setup to such an artefact. acceptedVersion |
format |
Book Part |
author |
Sauder, Thomas Michel Sørensen, Asgeir Johan Larsen, Kjell |
author_facet |
Sauder, Thomas Michel Sørensen, Asgeir Johan Larsen, Kjell |
author_sort |
Sauder, Thomas Michel |
title |
Real-Time Hybrid Model Testing of a Top Tensioned Riser: a Numerical Case Study on Interface Time-Delays and Truncation Ratio |
title_short |
Real-Time Hybrid Model Testing of a Top Tensioned Riser: a Numerical Case Study on Interface Time-Delays and Truncation Ratio |
title_full |
Real-Time Hybrid Model Testing of a Top Tensioned Riser: a Numerical Case Study on Interface Time-Delays and Truncation Ratio |
title_fullStr |
Real-Time Hybrid Model Testing of a Top Tensioned Riser: a Numerical Case Study on Interface Time-Delays and Truncation Ratio |
title_full_unstemmed |
Real-Time Hybrid Model Testing of a Top Tensioned Riser: a Numerical Case Study on Interface Time-Delays and Truncation Ratio |
title_sort |
real-time hybrid model testing of a top tensioned riser: a numerical case study on interface time-delays and truncation ratio |
publishDate |
2017 |
url |
http://hdl.handle.net/11250/2459498 https://doi.org/10.1115/OMAE2017-62498 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 2: Prof. Carl Martin Larsen and Dr. Owen Oakley Honoring Symposia on CFD and VIV ASME 2017;OMAE2017-62498 Norges forskningsråd: 254845 ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering, Volume 2: Prof. Carl Martin Larsen and Dr. Owen Oakley Honoring Symposia on CFD and VIV urn:isbn:978-0-7918-5764-9 http://hdl.handle.net/11250/2459498 https://doi.org/10.1115/OMAE2017-62498 cristin:1503606 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no Copyright © 2017 by ASME |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1115/OMAE2017-62498 |
container_title |
Volume 2: Prof. Carl Martin Larsen and Dr. Owen Oakley Honoring Symposia on CFD and VIV |
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