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
Language:unknown
Published: 2014
Subjects:
Earth and Related Environmental Sciences
Probability Theory and Statistics
Hundred years wave
Significant wave heights
Level crossings
Rainflow cycles
Narrow band approximation
Fatigue damage
North Atlantic
Online Access:https://doi.org/10.1016/j.jmarsys.2013.03.006
https://research.chalmers.se/en/publication/178358
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.

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