Extrapolation of model tests measurements of whipping to identify the dimensioning sea states for container ships

Gaute Storhaug, Ingrid Marie Vincent Andersen

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Abstract

Whipping can contribute to increased fatigue and extreme loading of container ships, and guidelines have been made available by the leading class societies. Reports concerning the hogging collapse of MSC Napoli and MOL Comfort suggest that whipping contributed. The accidents happened in moderate to small storms. Model tests of three container ships have been carried out in different sea states under realistic assumptions. Preliminary extrapolation of the measured data suggested that moderate storms are dimensioning when whipping is included due to higher maximum speed in moderate storms. This paper considers various extrapolation methods to investigate the uncertainty in the extrapolation methods and to see if all methods confirm that the moderate storms are dimensioning.
Original languageEnglish
JournalProceedings of the International Offshore and Polar Engineering Conference
Volume3
Pages (from-to)114-122
ISSN1098-6189
Publication statusPublished - 2015
Event25th International Ocean and Polar Engineering Conference - Kona, United States
Duration: 21 Jun 201526 Jun 2015
http://www.isope.org/conferences/conferences.htm

Conference

Conference25th International Ocean and Polar Engineering Conference
CountryUnited States
CityKona
Period21/06/201526/06/2015
Internet address

Keywords

  • Container ships
  • Extrapolation
  • Extreme Value Prediction
  • Hydro-elasticity
  • Model tests
  • Wave induced vibrations
  • Whipping

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