Evaluation of wave resistances estimated using wave spectra and a ship model

This paper evaluates the accuracy in the estimation of wave resistance of ships using information available in weather forecasts. The ability to do this is important when optimizing ship routes. The common way to estimate the wave resistance is to use a so called Force Response Amplitude Operator (F...

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Bibliographic Details
Published in2017 25th Mediterranean Conference on Control and Automation (MED) pp. 322 - 327
Main Authors Molander, Mats, Garcia-Gabin, Winston
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2017
Subjects
Force
Marine vehicles
Mathematical model
Optimization
Resistance
Weather forecasting
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Summary:This paper evaluates the accuracy in the estimation of wave resistance of ships using information available in weather forecasts. The ability to do this is important when optimizing ship routes. The common way to estimate the wave resistance is to use a so called Force Response Amplitude Operator (Force RAO) together with a wave spectrum parameterized with a small number of parameters supplied through weather forecasts. The accuracy in the resistance is evaluated by treating a large number of spectra calculated from real wave data measured by buoys from National Data Buoy Center of National Oceanic and Atmospheric Administration (NOAA) as if they were actual weather conditions encountered during a voyage. Force RAOs of an example ship is then used to calculate wave resistances based on the "exact" spectra with those obtained using spectra based on the few parameters that would have been available in reality through weather forecasts. The mean of the relative error in the wave resistance ranged between 17.6 and 36.9%, depending on which spectrum model that was used.
ISSN:2473-3504
DOI:10.1109/MED.2017.7984138