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dc.contributor.authorWu, Jie
dc.contributor.authorLekkala, Malakonda Reddy
dc.contributor.authorOng, Muk Chen
dc.contributor.authorPassano, Elisabeth
dc.contributor.authorVoie, Per Erlend
dc.date.accessioned2017-11-10T10:13:28Z
dc.date.available2017-11-10T10:13:28Z
dc.date.created2017-11-06T13:15:45Z
dc.date.issued2017-06-25
dc.identifier.citationASME 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 Trondheim, Norway, June 25–30, 2017nb_NO
dc.identifier.isbn978-0-7918-5764-9
dc.identifier.urihttp://hdl.handle.net/11250/2465506
dc.description.abstractDeepwater risers are susceptible to Vortex Induced Vibrations (VIV) when subjected to currents. When responding at high modes, fatigue damage the in in-line (IL) direction may become equally important as the cross-flow (CF) components. If a riser experiences directional currents, fatigue damage must be evaluated at several locations on the cross-section’s circumference. Accurate calculation of both IL and CF responses are therefore needed. Empirical VIV prediction programs, such as VIVANA, SHEAR7 and VIVA, are the most common tools used by the offshore industry to design against VIV loads. Progress has been seen in the prediction of CF responses. Efforts have also been made to include an IL load model in VIVANA. A set of excitation coefficient parameters were obtained from rigid cylinder test and adjusted using measured responses of one of the flexible cylinder VIV tests. This set of excitation coefficient parameters is still considered preliminary and further validation is required. Without an accurate IL response prediction, a conservative approach in VIV analysis has to be followed, i.e. all current profiles have to assumed to be uni-directional or acting in the same direction. The purpose of the present paper is to provide a reliable combined IL and CF load model for the empirical VIV prediction programs. VIV prediction using the existing combined IL and CF load model in VIVANA is validated against selected flexible cylinder test data. A case study of a deepwater top tension riser (TTR) has been carried out. The results indicate VIV fatigue damage 1 using 2D directional current profiles is less conservative compared to the traditional way of using unidirectional current profiles.nb_NO
dc.language.isoengnb_NO
dc.relation.ispartofASME 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
dc.relation.ispartofseriesASME Proceedings | Prof. Carl Martin Larsen and Dr. Owen Oakley Honoring Symposia on CFD and VIV;OMAE2017-61766
dc.rightsNavngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/deed.no*
dc.subjectRisers (Casting)nb_NO
dc.subjectPipeline risersnb_NO
dc.subjectVortex-induced vibrationnb_NO
dc.titlePrediction of Combined IL and CF VIV Response of Deepwater Risersnb_NO
dc.typeChapternb_NO
dc.description.versionacceptedVersionnb_NO
dc.rights.holderCopyright © 2017 by ASMEnb_NO
dc.identifier.doi10.1115/OMAE2017-61766
dc.identifier.cristin1511310
cristin.unitcode7566,8,0,0
cristin.unitcode7566,0,0,0
cristin.unitnameOcean Engineering
cristin.unitnameSINTEF Ocean
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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Navngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal
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