Interaction of random sea waves with floating structures in general bathymetry regions

Belibassakis, KA; Georgiou, YG; Athanassoulis, GA

dc.contributor.author	Belibassakis, KA	en
dc.contributor.author	Georgiou, YG	en
dc.contributor.author	Athanassoulis, GA	en
dc.date.accessioned	2014-03-01T02:53:53Z
dc.date.available	2014-03-01T02:53:53Z
dc.date.issued	2012	en
dc.identifier.issn	10986189	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36481
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-84866134370&partnerID=40&md5=3b823dc056ab4523eb8f15fa051e69fd	en
dc.subject	Floating body	en
dc.subject	Quasi-Determinism theory	en
dc.subject	Stochastic responses	en
dc.subject	Variable bathymetry	en
dc.title	Interaction of random sea waves with floating structures in general bathymetry regions	en
heal.type	conferenceItem	en
heal.publicationDate	2012	en
heal.abstract	The interaction of a random incident wave field with a floating structure in variable bathymetry regions is studied, considering the free surface displacement process in the context of first-order potential theory. The hybrid (BEM - coupled mode) model developed by Belibassakis (2008) is employed to obtain the hydrodynamic analysis of the system. The above model is based on the coupled-mode theory for the propagation of water waves in general bottom topography, developed by Athanassoulis and Belibassakis (1999), in conjunction with a boundary integral equation formulation of the near field. Numerical results are presented demonstrating that wave-structurebottom interactions could have a significant effect on the free surface elevation, quite similarly as in the case of wave-bottom interaction in variable bathymetry studied by Athanassoulis et al (2003). The modifications are interpreted according to a variation parameter defined as the ratio of the standard deviation of the free surface elevation in the wave field, including diffraction and radiation effects, over the corresponding standard deviation of the incident wave system. Generalizing the approach recently presented by Malara et al (2011), the interaction between a high wave and the floating structure is subsequently investigated, in the space and time domain by means of the Quasi-Determinism theory (see Boccotti 2000), allowing the estimation of the free surface displacement when an extreme wave crest occurs in the vicinity of the floating structure. Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE).	en
heal.journalName	Proceedings of the International Offshore and Polar Engineering Conference	en
dc.identifier.spage	1335	en
dc.identifier.epage	1342	en