A model of significant wave height for reliability assessment of a ship
Artikel i vetenskaplig tidskrift, 2014

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.

Hundred years wave

Significant wave heights

Level crossings

Rainflow cycles

Narrow band approximation

Fatigue damage


Krzysztof Podgorski

Lunds universitet

Igor Rychlik

Göteborgs universitet

Chalmers, Matematiska vetenskaper, Matematisk statistik

Journal of Marine Systems

0924-7963 (ISSN)

Vol. 130 109-123


Grundläggande vetenskaper


Geovetenskap och miljövetenskap

Sannolikhetsteori och statistik



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