Improved Wave-vessel Transfer Functions by Uncertainty Modelling

Ulrik Dam Nielsen, Kasper Fønss Bach, Toshio Iseki

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Abstract

This paper deals with uncertainty modelling of wave-vessel transfer functions used to calculate or predict wave-induced responses of a ship in a seaway. Although transfer functions, in theory, can be calculated to exactly reflect the behaviour of the ship when exposed to waves, uncertainty in input variables, notably speed, draft and relative wave eading, often compromises results. In this study, uncertling is applied to improve theoretically calculated transfer functions, so they better fit the corresponding experimental, full-scale ones. Based on a vast amount of full-scale measurements data, it is shown that uncertainty modelling can be successfully used to improve accuracy (and reliability) of theoretical transfer functions.
Original languageEnglish
JournalNihon Kokai Gakkai Ronbunshu
Volume134
Pages (from-to)134-137
ISSN0388-7405
Publication statusPublished - 2016

Keywords

  • Navigational instrument and measurement
  • Transfer functions
  • Uncertainty modelling
  • Frequency-dependent model uncertainty factor
  • Improved prediction of short-term ship responses

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