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Probability of Occurrence of Extreme Waves in Three Dimensional Mechanically Generated Random Wave Fields: A Comparison With Numerical Simulations

[+] Author Affiliations
A. Toffoli

Swinburne University of Technology, Hawthorn, VIC, Australia

S. Chai

Australian Maritime College; University of Tasmania, Newnham, TAS, Australia

E. M. Bitner-Gregersen

Det Norske Veritas A.S., Ho̸vik, Norway

F. Pistani

The University of Western Australia, Crawley, WA, Australia

Paper No. OMAE2011-49198, pp. 143-150; 8 pages
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 2: Structures, Safety and Reliability
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4434-2
  • Copyright © 2011 by ASME


Experimental and numerical investigations reveal that nonlinear modulational instability can significantly affect the probability of occurrence of extreme waves, especially if waves are sufficiently steep and narrow banded both in the frequency and directional domain. However, it is not yet completely clear whether numerical simulations can provide an accurate quantitative estimate of experimental results. Here the potential Euler equations are used to assess the ability of numerical models to describe the evolution of statistical properties of mechanically generated directional, random wave fields and in particular the evolution of the kurtosis. Results show that simulations provide a good quantitative estimate of experimental observations within a broad range of wave directional width.

Copyright © 2011 by ASME



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