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dc.contributor.authorWilcken, Sara
dc.date.accessioned2012-10-16T12:41:20Z
dc.date.available2012-10-16T12:41:20Z
dc.date.issued2012
dc.identifier.urihttp://hdl.handle.net/11250/182992
dc.descriptionMaster's thesis in Offshore technologyno_NO
dc.description.abstractThe execution of marine operations often depends on the wave heights being low enough for safe operations. This needs to be the case for the time the operation takes. Weather forecasts are used to predict the wave heights. Uncertainties are connected to weather forecasts and higher wave heights than expected during a marine operation can potentially lead to accidents. Thus Det Norske Veritas introduced the so called “alpha factors” for the North and Norwegian Sea in its standard for Marine Operations ([1], [18]). Alpha factors downgrade the operational wave height limit to a forecasted operational wave height limit to take care of the weather forecast uncertainty in these areas. This thesis explains the calculation as well as the use of the alpha factor. Comparisons to how other standards and guidelines treat the weather forecast uncertainty are drawn. Due to potentially more marine operations in the Barents Sea in the near future it is discussed how to take care of the weather forecast uncertainty in this region. Alpha factors for the Barents Sea are calculated. They indicate that the weather forecast uncertainty is bigger in the Barents Sea than further south. The small scale storms that are characteristic to Polar Regions called “polar lows” are described: These are threats to marine operations in the Barents Sea. Alpha factors are not sufficient to take care of the forecast uncertainty connected to polar lows. Thus the suggestion is made that the polar low probability forecast should be a requirement for the execution of marine operations in the Barents Sea.no_NO
dc.language.isoengno_NO
dc.publisherUniversity of Stavanger, Norwayno_NO
dc.relation.ispartofseriesMasteroppgave/UIS-TN-IKM/2012;
dc.subjectoffshore teknologino_NO
dc.subjectundervannsteknologino_NO
dc.subjectweather forecast uncertaintyno_NO
dc.subjectpolar lowno_NO
dc.subjectBarents Seano_NO
dc.subjectalpha factorno_NO
dc.subjectmarine operationno_NO
dc.titleAlpha factors for the calculation of forecasted operational limits for marine operations in the Barents Seano_NO
dc.typeMaster thesisno_NO
dc.subject.nsiVDP::Technology: 500::Marine technology: 580::Offshore technology: 581no_NO


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  • Master's theses (TN-IKM / TN-IMBM) [603]
    Masteroppgaver i Konstruksjoner og materialer / Maskin, bygg og materialteknologi (maskinkonstruksjoner, byggkonstruksjoner og energiteknologi) / Masteroppgaver i Offshore teknologi: industriell teknologi og driftsledelse - Offshore technology: industrial Asset management / Masteroppgaver i Offshoreteknologi : offshore systemer (konstruksjonsteknikk og marin- og undervannsteknologi-subsea technology)

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