A model of significant wave height for reliability assessment of a ship

Significant wave heights are modeled by means of a spatial-temporal random Gaussian field. Its dependent structure can be localized by introduction of time and space dependent parameters in the spectrum. The model has the advantage of having a relatively small number of parameters. These parameters...

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Bibliographic Details
Published in:Journal of Marine Systems
Main Authors: Podgorski, Krzysztof, Rychlik, Igor
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2014
Subjects:
Probability Theory and Statistics
Significant wave heights
Hundred years wave
Fatigue damage
Narrow
band approximation
Rainflow cycles
Level crossings
North Atlantic
Online Access:https://lup.lub.lu.se/record/4255808
https://doi.org/10.1016/j.jmarsys.2013.03.006
Description
Summary:Significant wave heights are modeled by means of a spatial-temporal random Gaussian field. Its dependent structure can be localized by introduction of time and space dependent parameters in the spectrum. The model has the advantage of having a relatively small number of parameters. These parameters have natural physical interpretation and are statistically fitted to represent variability of observed significant wave height records. The fitted spatial-temporal significant wave field allows for prediction of fatigue accumulation in ship details and of extreme responses encountered. The method is exemplified by analyzing a container ship data relevant for North Atlantic trade and the results show a high agreement with actual on-board measurements. (C) 2013 Elsevier B.V. All rights reserved.

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