An Experimental and Numerical Investigation of the Effect of Axial Thermal Gradients in Flexible Pipes
This paper discusses the structural challenges associated with high axial temperature gradients and the corresponding internal cross section forces. A representative flexible pipe section designed for high operational temperature has been subject to full scale testing with temperature profiles obtai...
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ftsintef:oai:sintef.brage.unit.no:11250/2457162 2023-05-15T14:22:48+02:00 An Experimental and Numerical Investigation of the Effect of Axial Thermal Gradients in Flexible Pipes Fergestad, Dag Klæbo, Frank Muren, Jan Hylland, Pål Grøv, Tom Are Lange, Hans Iver Gjøsteen, Janne Kristin Økland Gjendal, Andreas Melve, Bjørn Kristensen, Claus Egeberg 2017-09-21 application/pdf http://hdl.handle.net/11250/2457162 https://doi.org/10.1115/OMAE2017-61804 eng eng ASME ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 5A: Pipelines, Risers, and Subsea Systems ASME Digital Collection;OMAE2017-61804 ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering Volume 5A: Pipelines, Risers, and Subsea Systems urn:isbn:978-0-7918-5769-4 http://hdl.handle.net/11250/2457162 https://doi.org/10.1115/OMAE2017-61804 cristin:1498615 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 Chapter 2017 ftsintef https://doi.org/10.1115/OMAE2017-61804 2021-08-04T12:00:44Z This paper discusses the structural challenges associated with high axial temperature gradients and the corresponding internal cross section forces. A representative flexible pipe section designed for high operational temperature has been subject to full scale testing with temperature profiles obtained by external heating and cooling. The test is providing detailed insight in onset and magnitude of relative layer movements and layer forces. As part of the full-scale testing, novel methods for temperature gradient testing of unbonded flexible pipes have been developed, along with layer force- and deflection-measurement techniques. The full-scale test set-up has been subject to numerous temperature cycles of various magnitudes, gradients, absolute temperatures, as well as tension cycling to investigate possible couplings to dynamics. Extensive use of finite element analysis has efficiently supported test planning, instrumentation and execution, as well as enabling increased understanding of the structural interaction within the unbonded flexible pipe cross section. When exploiting the problem by finite element analysis, key inputs will be correct material models for the polymeric layers, and as-built dimensions/thicknesses. Finding the balance between reasonable simplification and model complexity is also a challenge, where access to high quality full-scale tests and dissected pipes coming back from operation provides good support for these decisions. Considering the extensive full scale testing, supported by advanced finite element analysis, it is evident that increased attention will be needed to document reliable operation in the most demanding high temperature flexible pipe applications. acceptedVersion Book Part Arctic SINTEF Open (Brage) Volume 5A: Pipelines, Risers, and Subsea Systems |
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SINTEF Open (Brage) |
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ftsintef |
language |
English |
description |
This paper discusses the structural challenges associated with high axial temperature gradients and the corresponding internal cross section forces. A representative flexible pipe section designed for high operational temperature has been subject to full scale testing with temperature profiles obtained by external heating and cooling. The test is providing detailed insight in onset and magnitude of relative layer movements and layer forces. As part of the full-scale testing, novel methods for temperature gradient testing of unbonded flexible pipes have been developed, along with layer force- and deflection-measurement techniques. The full-scale test set-up has been subject to numerous temperature cycles of various magnitudes, gradients, absolute temperatures, as well as tension cycling to investigate possible couplings to dynamics. Extensive use of finite element analysis has efficiently supported test planning, instrumentation and execution, as well as enabling increased understanding of the structural interaction within the unbonded flexible pipe cross section. When exploiting the problem by finite element analysis, key inputs will be correct material models for the polymeric layers, and as-built dimensions/thicknesses. Finding the balance between reasonable simplification and model complexity is also a challenge, where access to high quality full-scale tests and dissected pipes coming back from operation provides good support for these decisions. Considering the extensive full scale testing, supported by advanced finite element analysis, it is evident that increased attention will be needed to document reliable operation in the most demanding high temperature flexible pipe applications. acceptedVersion |
format |
Book Part |
author |
Fergestad, Dag Klæbo, Frank Muren, Jan Hylland, Pål Grøv, Tom Are Lange, Hans Iver Gjøsteen, Janne Kristin Økland Gjendal, Andreas Melve, Bjørn Kristensen, Claus Egeberg |
spellingShingle |
Fergestad, Dag Klæbo, Frank Muren, Jan Hylland, Pål Grøv, Tom Are Lange, Hans Iver Gjøsteen, Janne Kristin Økland Gjendal, Andreas Melve, Bjørn Kristensen, Claus Egeberg An Experimental and Numerical Investigation of the Effect of Axial Thermal Gradients in Flexible Pipes |
author_facet |
Fergestad, Dag Klæbo, Frank Muren, Jan Hylland, Pål Grøv, Tom Are Lange, Hans Iver Gjøsteen, Janne Kristin Økland Gjendal, Andreas Melve, Bjørn Kristensen, Claus Egeberg |
author_sort |
Fergestad, Dag |
title |
An Experimental and Numerical Investigation of the Effect of Axial Thermal Gradients in Flexible Pipes |
title_short |
An Experimental and Numerical Investigation of the Effect of Axial Thermal Gradients in Flexible Pipes |
title_full |
An Experimental and Numerical Investigation of the Effect of Axial Thermal Gradients in Flexible Pipes |
title_fullStr |
An Experimental and Numerical Investigation of the Effect of Axial Thermal Gradients in Flexible Pipes |
title_full_unstemmed |
An Experimental and Numerical Investigation of the Effect of Axial Thermal Gradients in Flexible Pipes |
title_sort |
experimental and numerical investigation of the effect of axial thermal gradients in flexible pipes |
publisher |
ASME |
publishDate |
2017 |
url |
http://hdl.handle.net/11250/2457162 https://doi.org/10.1115/OMAE2017-61804 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 5A: Pipelines, Risers, and Subsea Systems ASME Digital Collection;OMAE2017-61804 ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering Volume 5A: Pipelines, Risers, and Subsea Systems urn:isbn:978-0-7918-5769-4 http://hdl.handle.net/11250/2457162 https://doi.org/10.1115/OMAE2017-61804 cristin:1498615 |
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/OMAE2017-61804 |
container_title |
Volume 5A: Pipelines, Risers, and Subsea Systems |
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1766295318789357568 |