Hull form optimization for hydrodynamic performance

Grigoropoulos, GJ

dc.contributor.author	Grigoropoulos, GJ	en
dc.date.accessioned	2014-03-01T01:20:35Z
dc.date.available	2014-03-01T01:20:35Z
dc.date.issued	2004	en
dc.identifier.issn	0025-3316	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15975
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-7044226382&partnerID=40&md5=e3f0055309d2a9408475280be09f30b6	en
dc.subject.classification	Engineering, Ocean	en
dc.subject.classification	Oceanography	en
dc.subject.other	Algorithms	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Computer aided design	en
dc.subject.other	Functions	en
dc.subject.other	Optimization	en
dc.subject.other	Parameter estimation	en
dc.subject.other	Ships	en
dc.subject.other	Hull forms	en
dc.subject.other	Hydrodynamic performance	en
dc.subject.other	Regular waves	en
dc.subject.other	Water resistance	en
dc.subject.other	Hydrodynamics	en
dc.title	Hull form optimization for hydrodynamic performance	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	A method for optimizing hull forms with respect to their hydrodynamic performance in calm and rough water is presented. The method is based on an initial optimization of a parent hull form for seakeeping and the improvement of the resulting optimum hull form for calm water resistance. In the first part of the method, variant hull forms differing from a parent in the main dimensions and/or in one or more hull form parameters, such as C-WP, LCF, C-B, LCB, KB, C-P, are automatically generated and their seakeeping qualities evaluated. When appropriate ranges for the principal characteristics and parameters of the hull form under investigation are prescribed, a formal optimization procedure is used to obtain the variant with the best seakeeping behavior. The weighted sum of the resonant values of selected ship responses for a number of ship speeds and headings in regular waves forms the objective function. The Hooke and Jeeves algorithm is used to accomplish the optimization. The procedure results in a set of trends regarding the proposed variations of the selected hull form parameters, within the specified constraints. These trends are then applied on the parent hull to derive an optimized hull form with fair lines. Subsequently, this hull form can be locally modified to improve its calm water resistance or, as it should be done, its propulsion characteristics. The applicability of the method is demonstrated in two cases: a conventional reefer ship and a naval destroyer. Scaled models of the parent and the optimized hull forms have been tested for calm water resistance and seakeeping. In both cases the validity of the methodology is demonstrated.	en
heal.publisher	SOC NAVAL ARCH MARINE ENG	en
heal.journalName	Marine Technology	en
dc.identifier.isi	ISI:000224115900004	en
dc.identifier.volume	41	en
dc.identifier.issue	4	en
dc.identifier.spage	167	en
dc.identifier.epage	182	en