Designing against parametric instability in following seas

Spyrou, KJ

dc.contributor.author	Spyrou, KJ	en
dc.date.accessioned	2014-03-01T01:15:32Z
dc.date.available	2014-03-01T01:15:32Z
dc.date.issued	2000	en
dc.identifier.issn	0029-8018	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13574
dc.subject	parametric	en
dc.subject	roll	en
dc.subject	capsize	en
dc.subject	ship	en
dc.subject	instability	en
dc.subject	Mathieu	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Engineering, Ocean	en
dc.subject.classification	Oceanography	en
dc.subject.classification	Water Resources	en
dc.subject.other	BIFURCATIONS	en
dc.subject.other	RESONANCE	en
dc.title	Designing against parametric instability in following seas	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0029-8018(99)00019-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0029-8018(99)00019-0	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	We investigate the characteristics of parametric instability when very large variations of restoring between the wave trough and the wave crest are taking place, creating a restoring that is alternating between negative (or nearly negative) and strongly positive values. The possible ways to consider the nonlinearities in damping and in restoring are discussed in detail. The boundary separating parametric instability from pure-loss is identified. In depth studies are carried out to ascertain the practical relevance of the parametric mechanism. Instability regions are identified in terms of transient motions, rather than in terms of the customary asymptotic stability chart associated with Mathieu's equation. A basis for comparing parametric roll behavior for different representations of restoring is established. Asymmetric variation laws and bi-chromatic waves are considered. (C) 1999 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	OCEAN ENGINEERING	en
dc.identifier.doi	10.1016/S0029-8018(99)00019-0	en
dc.identifier.isi	ISI:000083156800003	en
dc.identifier.volume	27	en
dc.identifier.issue	6	en
dc.identifier.spage	625	en
dc.identifier.epage	653	en