Modal decoupling methods for fluid-structure interaction in piping systems

Antoniadis, I; Kanarachos, A

dc.contributor.author	Antoniadis, I	en
dc.contributor.author	Kanarachos, A	en
dc.date.accessioned	2014-03-01T01:07:12Z
dc.date.available	2014-03-01T01:07:12Z
dc.date.issued	1988	en
dc.identifier.issn	0045-7949	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9848
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0023844744&partnerID=40&md5=383576242855d53afe0499ccd055e266	en
dc.subject.classification	Computer Science, Interdisciplinary Applications	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	HYDRODYNAMICS - Fluid Structure Interaction	en
dc.subject.other	VIBRATIONS - Analysis	en
dc.subject.other	MODAL DECOUPLING	en
dc.subject.other	PIPING SYSTEMS	en
dc.title	Modal decoupling methods for fluid-structure interaction in piping systems	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1988	en
heal.abstract	A simple model for fluid-structure interaction in piping systems is considered, using beam elements for the structure and assuming the propagation of planar pressure waves in the fluid. The forces, exerted, on the structure at the 'singular' points of the piping system due to the change of the fluid momentum, are treated in a natural and straightforward way. The model is shown to behave quite well in the low frequency range, provided that certain corrections are made to the structure inertia, to the structure flexibility at the 'singular' points (elbows, tees, etc) and to the fluid sound speed. Recent advances concerning the general 'acoustoelastic' fluid structure model-symmetrisation procedures, modal decoupling methods-are applied to the model. The modal methods start with the solution of the 'in vacuum' and of the 'acoustic' eigenproblems and lead to the solution, not only of the 'full' eigenproblem, but also of several 'limit case' eigenproblems, such as the 'incompressible' fluid. These methods are not simply an efficient analytical tools, since they can be implemented utilizing 'standard black box' beam analysis codes, but they can also provide the designer with useful indications with respect to the effect of several individual structure or fluid parameters on the coupled system. © 1988.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Computers and Structures	en
dc.identifier.isi	ISI:A1988P416300005	en
dc.identifier.volume	29	en
dc.identifier.issue	4	en
dc.identifier.spage	577	en
dc.identifier.epage	585	en