Kuznetsov S.Yu., Saprykina Ya.V.
Process of freak waves formation as a result of transformation of initial narrow wave spectrum considered on the base of laboratory experiments. It is demonstrated that downshifting of spectral maximum occurs during the propagation of steep initially monochromatic and bichromatic waves. This downshifting is the main reason of variability of amplitude-frequency contents of individual waves and, as sequence, the freak wave’s formation. In paper is considered how the evolution of spectrum depends on initial steepness of waves and spectral wideness.