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Estimating operability of ships in ridged ice fields

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Kuuliala, Lauri
dc.contributor.author Kujala, Pentti
dc.contributor.author Suominen, Mikko
dc.contributor.author Montewka, Jakub
dc.date.accessioned 2017-01-19T11:10:10Z
dc.date.issued 2017-03
dc.identifier.citation Kuuliala , L , Kujala , P , Suominen , M & Montewka , J 2017 , ' Estimating operability of ships in ridged ice fields ' , Cold Regions Science and Technology , vol. 135 , pp. 51–61 . https://doi.org/10.1016/j.coldregions.2016.12.003 en
dc.identifier.issn 0165-232X
dc.identifier.other PURE UUID: 99647a29-4ffa-4b67-9f8a-414cc9a2e3de
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/99647a29-4ffa-4b67-9f8a-414cc9a2e3de
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/11746712/1_s2.0_S0165232X16303883_main.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/24283
dc.description.abstract A method for estimating ship's resistance caused by sea ice ridge keels is revised and used as a part of a method for predicting performance of ships in ridged ice conditions. The resistance method is based on a continuum plasticity model of ridge rubble and is simple to compute. The performance prediction method combines deterministic simulations of ship motion with probabilistic modelling of ridged ice fields. Performance estimates given by the model are distribution of attainable mean speeds for given ice conditions and probability of the ship being able to operate independently. A comprehensive sensitivity analysis was performed to gain insight into the model and identify possible problematic parameters. The sensitivity analysis covered both the ice conditions and modelling assumptions. Two data-sets were used to test the simulation method. One set included the depth profile of sea ice, machinery data and the speed of a ship operating in ridged ice. The resistance method was able to predict the meanspeed over 3km well. The second data-set consisted of a history of ship's speeds and positions from AIS data and ice conditions estimated by a numerical ice model HELMI, developed in the Finnish Meteorological Institute. Observed mean speeds were mostly well within the distributions of mean speeds simulated by the transit simulation model. Predictions of independent operation were also promising. en
dc.format.extent 11
dc.format.extent 51–61
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Cold Regions Science and Technology en
dc.relation.ispartofseries Volume 135 en
dc.rights openAccess en
dc.title Estimating operability of ships in ridged ice fields en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Mechanical Engineering
dc.subject.keyword Winter navigation
dc.subject.keyword Ridged ice
dc.subject.keyword Ship's performance
dc.subject.keyword Transit simulation
dc.subject.keyword Statistical simulation
dc.subject.keyword Sensitivity analysis
dc.identifier.urn URN:NBN:fi:aalto-201701191228
dc.identifier.doi 10.1016/j.coldregions.2016.12.003


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