Three dimensional nonlinear dynamics of submerged, extensible catenary pipes conveying fluid and subjected to end-imposed excitations

Chatjigeorgiou, IK

dc.contributor.author	Chatjigeorgiou, IK	en
dc.date.accessioned	2014-03-01T01:34:47Z
dc.date.available	2014-03-01T01:34:47Z
dc.date.issued	2010	en
dc.identifier.issn	0020-7462	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20860
dc.subject	3D nonlinear response	en
dc.subject	Catenary pipes	en
dc.subject	Fluid flow	en
dc.subject	Marine applications	en
dc.subject.classification	Mechanics	en
dc.subject.other	3D nonlinear response	en
dc.subject.other	Added inertia	en
dc.subject.other	Constant velocities	en
dc.subject.other	Finite difference	en
dc.subject.other	Fluid element	en
dc.subject.other	Fluid flow	en
dc.subject.other	Hydrodynamic effect	en
dc.subject.other	In-plane	en
dc.subject.other	Internal flows	en
dc.subject.other	Irrotational	en
dc.subject.other	Newtonians	en
dc.subject.other	Non-linear drag forces	en
dc.subject.other	Non-linear dynamics	en
dc.subject.other	Non-linear response	en
dc.subject.other	Nonlinear dynamic problems	en
dc.subject.other	Numerical scheme	en
dc.subject.other	Numerical simulation	en
dc.subject.other	Out-of-plane vibrations	en
dc.subject.other	Output signal	en
dc.subject.other	Pipe elements	en
dc.subject.other	Pipe-conveying fluid	en
dc.subject.other	Pipes conveying fluid	en
dc.subject.other	Second orders	en
dc.subject.other	Time-varying components	en
dc.subject.other	Drag	en
dc.subject.other	Fluid dynamics	en
dc.subject.other	Fluids	en
dc.subject.other	Hydrodynamics	en
dc.subject.other	Marine applications	en
dc.subject.other	Pipe	en
dc.subject.other	Three dimensional	en
dc.subject.other	Vibrations (mechanical)	en
dc.subject.other	Flow of fluids	en
dc.title	Three dimensional nonlinear dynamics of submerged, extensible catenary pipes conveying fluid and subjected to end-imposed excitations	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijnonlinmec.2010.04.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijnonlinmec.2010.04.001	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The complete 3D nonlinear dynamic problem of an extensible, submerged catenary pipe conveying fluid is considered. For describing the dynamics of the system, the Newtonian derivation procedure is followed. The flow inside the pipe is considered inviscid, irrotational and incompressible with constant velocity along the complete length of the pipe. The hydrodynamic effects are taken into account 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 combining the equations of inertia equilibrium. The system is solved using an efficient, second-order accurate, finite differences numerical scheme. The effect of the steady flow inside the pipe on both the in-plane and the out-of-plane vibrations is assessed with the aid of numerical simulations using as a model a relatively small-sag submerged catenary. The output signals of the time varying components that govern the dynamics of the pipe, have been properly processed to assess the effect of the internal flow on both the in-plane and the out-of-plane vibrations. (C) 2010 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	International Journal of Non-Linear Mechanics	en
dc.identifier.doi	10.1016/j.ijnonlinmec.2010.04.001	en
dc.identifier.isi	ISI:000280014400001	en
dc.identifier.volume	45	en
dc.identifier.issue	7	en
dc.identifier.spage	667	en
dc.identifier.epage	680	en