Dynamic interaction of catenary risers with the seafloor

Katifeoglou, SA; Chatjigeorgiou, IK

dc.contributor.author	Katifeoglou, SA	en
dc.contributor.author	Chatjigeorgiou, IK	en
dc.date.accessioned	2014-03-01T11:46:46Z
dc.date.available	2014-03-01T11:46:46Z
dc.date.issued	2012	en
dc.identifier.issn	01411187	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/38029
dc.subject	Offshore applications	en
dc.subject	Seafloor interaction	en
dc.subject	Soil reaction	en
dc.subject	Steel Catenary Risers	en
dc.subject	Touchdown point	en
dc.title	Dynamic interaction of catenary risers with the seafloor	en
heal.type	other	en
heal.identifier.primary	10.1016/j.apor.2012.06.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.apor.2012.06.001	en
heal.publicationDate	2012	en
heal.abstract	It is the purpose of this study to quantify the sea-bottom soil reaction effect on the dynamics of a Steel Catenary Riser by incorporating the soil reaction forces into the theoretical model of the dynamic equilibrium system. The calculations for the soil reaction forces have been performed quasi-statically, assuming specified embedment depths and trenching geometries. The plane stresses of the soil are determined with the aid of the commercial Geotechnical software, Phase2. Accordingly, the stresses are integrated around the arched riser-soil contact surface for the derivation of vertical soil reaction forces that resist to the penetration of the riser. These force-values are introduced in the nonlinear dynamic model as concentrated loads which are applied at the touchdown point (TDP). Several tests cases of top end harmonic excitations have been performed, aiming to investigate the effect of the TDP soil reaction on the various dynamic parameters which are responsible for fatigue damage. © 2012 Elsevier Ltd.	en
heal.journalName	Applied Ocean Research	en
dc.identifier.doi	10.1016/j.apor.2012.06.001	en
dc.identifier.volume	38	en
dc.identifier.spage	1	en
dc.identifier.epage	15	en