The invention relates to a method for generating extreme
waves at specified positions in an experimental water tank and belongs to the technical field of ocean
engineering and hydrodynamic
experimental research. The method comprises steps of: determining a
wave parameter according to a water tank parameter in a laboratory, generating a wave-generating
signal, inputting the wave-generating
signal into a wave-generating
system for initial wave making, determining whether the
waves are broken, and changing the wave amplitude and the spectrum width constituting the
waves if so in order to re-determine the
wave parameter; if not, calculating the
phase deviation at a focus position by using all-phase
Fourier transform, correcting the wave-generating
signal by using a
phase difference, generating waves by a wave generator, determining whether the
phase adjustment at the focus position converges, and recalculating the
phase deviation at the focus position if not; if so, generating the extreme waves at the specified positions. The method flexibly controls the effect position of the extreme waves and a structure model in the water tank and precisely generates extreme waves in different forms at designated positions of the water tank, thereby improving experimental efficiency and precision.