PROBABILITY OF THE FREAK WAVE APPEARANCE IN A 3-DIMENSIONAL SEA CONDITION

Akira Kimura, Takao Ohta

Abstract


In this study, the appearance probability of the freak waves is theoretically introduced applying the definitions by Klinting and Sand (1987). Their three conditions are formulated theoretically applying the probability distributions for the run of wave heights (Kimura,1980) and the distance of a mean point of the zero-crossing wave crest and trough from mean water level (Kimura and Ohta, 1992b). Its appearance probability in a uni-directional irregular wave condition is studied first, the theory is extended then to the 3-dimensional wave condition, and the definition is discussed in terms of the probability in the last.

Keywords


3D sea; freak wave; wave probability

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