Vortex-induced vibration analysis (VIVA) based on hydrodynamic databases

Zheng, H; Price, R; Modarres-Sadeghi, Y; Triantafyllou, GS; Triantafyllou, MS

dc.contributor.author	Zheng, H	en
dc.contributor.author	Price, R	en
dc.contributor.author	Modarres-Sadeghi, Y	en
dc.contributor.author	Triantafyllou, GS	en
dc.contributor.author	Triantafyllou, MS	en
dc.date.accessioned	2014-03-01T02:53:31Z
dc.date.available	2014-03-01T02:53:31Z
dc.date.issued	2011	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36385
dc.subject.other	Complex modes	en
dc.subject.other	Cross-flow oscillations	en
dc.subject.other	Cross-flow vibrations	en
dc.subject.other	Experimental data	en
dc.subject.other	Field data	en
dc.subject.other	First-principles	en
dc.subject.other	In-line	en
dc.subject.other	Lock-in	en
dc.subject.other	Sheared flow	en
dc.subject.other	Standing wave	en
dc.subject.other	Traveling wave	en
dc.subject.other	Vortex induced vibration	en
dc.subject.other	Arctic engineering	en
dc.subject.other	Hydrodynamics	en
dc.subject.other	Marine risers	en
dc.subject.other	Ocean currents	en
dc.subject.other	Reynolds number	en
dc.subject.other	Vibration analysis	en
dc.title	Vortex-induced vibration analysis (VIVA) based on hydrodynamic databases	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1115/OMAE2011-50192	en
heal.identifier.secondary	http://dx.doi.org/10.1115/OMAE2011-50192	en
heal.publicationDate	2011	en
heal.abstract	We outline the procedures used by program VIVA, developed over the last sixteen years to estimate the cross-flow vibration of marine risers in arbitrary currents. The program theory is based on a combination of first principles, extensive hydrodynamic databases, as well as modifications introduced through comparison against experimental and field data. The program was built from the start to handle standing as well as traveling waves, or arbitrary combinations of traveling and standing waves, through the use of complex modes. Considerable effort was expended to develop a hydrodynamic methodology that is suitable for short and long risers and cables, and which provides results in agreement with recent observed mechanisms. In particular, we outline changes to take into account: • the influence of in-line as well as cross-flow oscillations; • the influence of the Reynolds number; • the effect of high force harmonics; • modeling of lock-in in a sheared flow; • modeling of straked sections. The methodology is illustrated through several examples where predictions are compared with field and experimental data. Copyright © 2011 by ASME.	en
heal.journalName	Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE	en
dc.identifier.doi	10.1115/OMAE2011-50192	en
dc.identifier.volume	7	en
dc.identifier.spage	657	en
dc.identifier.epage	663	en