Manoeuvring behaviour of ships in extreme astern seas

Ayaz, Z; Vassalos, D; Spyrou, KJ

dc.contributor.author	Ayaz, Z	en
dc.contributor.author	Vassalos, D	en
dc.contributor.author	Spyrou, KJ	en
dc.date.accessioned	2014-03-01T01:24:35Z
dc.date.available	2014-03-01T01:24:35Z
dc.date.issued	2006	en
dc.identifier.issn	0029-8018	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17345
dc.subject	Broaching	en
dc.subject	Extreme ship motions	en
dc.subject	Following/quartering seas	en
dc.subject	Manoeuvring	en
dc.subject	Parametric rolling	en
dc.subject	Stability	en
dc.subject	Surf-riding	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	Broaching	en
dc.subject.other	Degrees of freedom (mechanics)	en
dc.subject.other	Mathematical models	en
dc.subject.other	Seakeeping	en
dc.subject.other	Ships	en
dc.subject.other	Manoeuvring	en
dc.subject.other	Parametric rolling	en
dc.subject.other	Ship motions	en
dc.subject.other	Surf-riding	en
dc.subject.other	Maneuverability	en
dc.subject.other	Broaching	en
dc.subject.other	Degrees of freedom (mechanics)	en
dc.subject.other	Maneuverability	en
dc.subject.other	Mathematical models	en
dc.subject.other	Seakeeping	en
dc.subject.other	Ships	en
dc.subject.other	navigation aid	en
dc.subject.other	numerical model	en
dc.subject.other	ship motion	en
dc.title	Manoeuvring behaviour of ships in extreme astern seas	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.oceaneng.2005.10.023	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.oceaneng.2005.10.023	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	In an attempt to contribute to efforts for a robust and effective numerical tool addressing ship motion in astern seas, this paper presents the development of a coupled non-linear 6-DOF model with frequency dependent coefficients, incorporating memory effects and random waves. A new axes system that allows straightforward combination between seakeeping and manoeuvring, whilst accounting for extreme motions, is proposed. Validation of the numerical model with the results of benchmark tests commissioned by ITTC's Specialist Group on Stability demonstrated qualitative, yet not fully satisfactory agreement between numerical and experimental results in line with other predictive tools. The numerical results indicate that the inclusion of frequency coefficients definitely affects the accuracy of the predictions. In order to enhance further the numerical model and obtain useful information on motion coupling, extensive captive and free running model tests were carried out. Good agreement with the experimental results was achieved. These studies provide convincing evidence of the capability of the developed numerical model to predict the dangerous conditions that a ship could encounter in extreme astern seas. As a result, it could offer new insights towards establishing relationships linking ship behaviour to design, environmental and operational parameters. (c) 2006 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Ocean Engineering	en
dc.identifier.doi	10.1016/j.oceaneng.2005.10.023	en
dc.identifier.isi	ISI:000242197400010	en
dc.identifier.volume	33	en
dc.identifier.issue	17-18	en
dc.identifier.spage	2381	en
dc.identifier.epage	2434	en