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A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration

The hydrodynamic coefficients in semi-empirical tool are optimized for a riser attached with staggered buoyancy modules undergoing Vortex-Induced Vibration (VIV) based on the SHELL Oil Experiment. The existing prediction tools are based on data derived from experiments, number of assumptions from st...

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Main Authors: Lekkala, M.R., Mohamed, L., Hafiz, M.F.U., Kim, D.K.
Format: Article
Published: Elsevier Ltd 2020
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089955966&doi=10.1016%2fj.oceaneng.2020.107760&partnerID=40&md5=13bf9429e8f34e56e77902b6c3fac31c
http://eprints.utp.edu.my/23274/
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spelling my.utp.eprints.232742021-08-19T07:26:29Z A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration Lekkala, M.R. Mohamed, L. Hafiz, M.F.U. Kim, D.K. The hydrodynamic coefficients in semi-empirical tool are optimized for a riser attached with staggered buoyancy modules undergoing Vortex-Induced Vibration (VIV) based on the SHELL Oil Experiment. The existing prediction tools are based on data derived from experiments, number of assumptions from strip theory, energy balance between fluid and structure and use of lift coefficient databases. Current advancements in conducting and calculating VIV response from the experiments shows that these assumptions may be invalid. The major difference arises between experimental observations and theoretical estimations is from lift coefficient databases. The databases extracted under laboratory conditions have limited Reynolds number flow conditions and only cross-flow motions were considered. The extracted hydrodynamic excitation coefficient database is posed to optimization problem, where the main objective is to minimize the prediction error of semi-empirical tools when compared with experimental results. We optimize the existing excitation coefficient database to improve the fatigue damage prediction of riser attached with staggered buoyancy modules. Application of modification factors and optimizing the hydrodynamic lift coefficients to the data from SHELL Exploration and Production Test provides the new optimized excitation coefficient datasets which reduce the error in the predicting the VIV response of the riser with staggered buoyancy modules. © 2020 Elsevier Ltd Elsevier Ltd 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089955966&doi=10.1016%2fj.oceaneng.2020.107760&partnerID=40&md5=13bf9429e8f34e56e77902b6c3fac31c Lekkala, M.R. and Mohamed, L. and Hafiz, M.F.U. and Kim, D.K. (2020) A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration. Ocean Engineering, 217 . http://eprints.utp.edu.my/23274/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description The hydrodynamic coefficients in semi-empirical tool are optimized for a riser attached with staggered buoyancy modules undergoing Vortex-Induced Vibration (VIV) based on the SHELL Oil Experiment. The existing prediction tools are based on data derived from experiments, number of assumptions from strip theory, energy balance between fluid and structure and use of lift coefficient databases. Current advancements in conducting and calculating VIV response from the experiments shows that these assumptions may be invalid. The major difference arises between experimental observations and theoretical estimations is from lift coefficient databases. The databases extracted under laboratory conditions have limited Reynolds number flow conditions and only cross-flow motions were considered. The extracted hydrodynamic excitation coefficient database is posed to optimization problem, where the main objective is to minimize the prediction error of semi-empirical tools when compared with experimental results. We optimize the existing excitation coefficient database to improve the fatigue damage prediction of riser attached with staggered buoyancy modules. Application of modification factors and optimizing the hydrodynamic lift coefficients to the data from SHELL Exploration and Production Test provides the new optimized excitation coefficient datasets which reduce the error in the predicting the VIV response of the riser with staggered buoyancy modules. © 2020 Elsevier Ltd
format Article
author Lekkala, M.R.
Mohamed, L.
Hafiz, M.F.U.
Kim, D.K.
spellingShingle Lekkala, M.R.
Mohamed, L.
Hafiz, M.F.U.
Kim, D.K.
A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration
author_facet Lekkala, M.R.
Mohamed, L.
Hafiz, M.F.U.
Kim, D.K.
author_sort Lekkala, M.R.
title A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration
title_short A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration
title_full A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration
title_fullStr A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration
title_full_unstemmed A practical technique for hydrodynamic coefficients modification in SHEAR7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration
title_sort practical technique for hydrodynamic coefficients modification in shear7 for fatigue assessment of riser buoyancy modules under vortex-induced vibration
publisher Elsevier Ltd
publishDate 2020
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089955966&doi=10.1016%2fj.oceaneng.2020.107760&partnerID=40&md5=13bf9429e8f34e56e77902b6c3fac31c
http://eprints.utp.edu.my/23274/
_version_ 1738656448769949696
score 13.211869

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