On the effect of internal flow on vibrating catenary risers in three dimensions

Chatjigeorgiou, IK

dc.contributor.author	Chatjigeorgiou, IK	en
dc.date.accessioned	2014-03-01T01:34:01Z
dc.date.available	2014-03-01T01:34:01Z
dc.date.issued	2010	en
dc.identifier.issn	0141-0296	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20647
dc.subject	Dynamic response	en
dc.subject	Inner flow	en
dc.subject	Marine applications	en
dc.subject	Potential theory	en
dc.subject	Risers	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	Added inertia	en
dc.subject.other	Catenary riser	en
dc.subject.other	Fluid element	en
dc.subject.other	Global dynamics	en
dc.subject.other	Hydrodynamic effect	en
dc.subject.other	Inner flow	en
dc.subject.other	Internal flows	en
dc.subject.other	Newtonians	en
dc.subject.other	Non-linear drag forces	en
dc.subject.other	Nonlinear dynamic problems	en
dc.subject.other	Numerical computations	en
dc.subject.other	Numerical predictions	en
dc.subject.other	Pipe elements	en
dc.subject.other	Potential theory	en
dc.subject.other	Risers	en
dc.subject.other	Three dimensions	en
dc.subject.other	Time and frequency domains	en
dc.subject.other	Velocity field	en
dc.subject.other	Drag	en
dc.subject.other	Dynamic response	en
dc.subject.other	Fluid dynamics	en
dc.subject.other	Hydrodynamics	en
dc.subject.other	Mechanics	en
dc.subject.other	Pipe	en
dc.subject.other	Time domain analysis	en
dc.subject.other	Marine applications	en
dc.subject.other	dynamic response	en
dc.subject.other	flow velocity	en
dc.subject.other	fluid dynamics	en
dc.subject.other	hydrodynamics	en
dc.subject.other	Newtonian fluid	en
dc.subject.other	offshore structure	en
dc.subject.other	riser	en
dc.subject.other	three-dimensional flow	en
dc.subject.other	vibration	en
dc.title	On the effect of internal flow on vibrating catenary risers in three dimensions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.engstruct.2010.07.004	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.engstruct.2010.07.004	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The complete 3D nonlinear dynamic problem of extensible, catenary risers conveying fluid is considered. For describing the dynamics of the system, the Newtonian derivation procedure is followed. The velocity field inside the pipe is formulated using potential theory. The hydrodynamic effects are taken into consideration through the nonlinear drag forces and the added inertia due to the hydrodynamic mass. Following the Newtonian derivation, the dynamics of the pipe element and the fluid element are considered separately and the final governing set is derived by combining the equations of inertia equilibrium. The study focuses specifically on the effect of the inner flow to the global dynamics of the riser. This task is accomplished using both time and frequency domain solution techniques. The former apply to the complete nonlinear system and the latter to the reduced linearized set. The effect of the inner flow is assessed based on numerical predictions which were obtained after extensive numerical computations and eventually some very interesting conclusions are drawn. (C) 2010 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Engineering Structures	en
dc.identifier.doi	10.1016/j.engstruct.2010.07.004	en
dc.identifier.isi	ISI:000282851700031	en
dc.identifier.volume	32	en
dc.identifier.issue	10	en
dc.identifier.spage	3313	en
dc.identifier.epage	3329	en