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dc.contributor.authorDalheim, Øyvind Øksnes
dc.contributor.authorSteen, Sverre
dc.date.accessioned2021-01-26T08:36:36Z
dc.date.available2021-01-26T08:36:36Z
dc.date.created2020-11-05T14:55:06Z
dc.date.issued2020
dc.identifier.citationJournal of Ship Research. 2020, 64 (2), 99-117.en_US
dc.identifier.issn0022-4502
dc.identifier.urihttps://hdl.handle.net/11250/2724677
dc.description.abstractPrediction of the added resistance or corresponding speed loss in real sea conditions is essential to evaluate the performance of a ship. Assessment of the environmental impact on vessel performance is essential for route and cargo planning, optimization of fuel consumption and design, and configuration of engines and the main propulsion system. In the present study, added resistance and speed loss in real sea conditions are evaluated from1 year of onboard monitoring data of a platform supply vessel (PSV) operating in the North Sea. The true sea margin is shown on an annual basis. Relative contributions from environmental conditions and vessel operation control are presented. Results are compared with model experiments and existing numerical methods for prediction of added resistance and speed loss in waves. The study shows that added resistance due to waves for this PSV is significantly larger than predicted by conventional frequency-domain calculations or model tests. No reason for the deviation is found, but it is anticipated that a combination of effects of longitudinal mass radius of gyration, differences in wavelength and steepness in model tests and reality, and nonlinear effects (not accounted for in the numerical calculations) is partly responsible for the deviations. For ships having similar main dimensions, the conventional ways of predicting added resistance or speed loss in waves is nonconservative, and improved methods should be sought.en_US
dc.language.isoengen_US
dc.publisherThe Society of Naval Architects and Marine Engineersen_US
dc.titleAdded Resistance and Speed Loss of a Ship Found Using Onboard Monitoring Dataen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionacceptedVersionen_US
dc.source.pagenumber99-117en_US
dc.source.volume64en_US
dc.source.journalJournal of Ship Researchen_US
dc.source.issue2en_US
dc.identifier.doi10.5957/jsr.2020.64.2.99
dc.identifier.cristin1845343
dc.description.localcodeThis article will not be available due to copyright restrictions (c) 2020 by The Society of Naval Architects and Marine Engineersen_US
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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