Hydrofoil Motions in Irregular Seas
STEVENS INST OF TECH HOBOKEN NJ HOBOKEN United States
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An experiment designed to investigate the validity of linear superposition principles as applied to the irregular motions of non-ventilated, dihedral hydrofoil systems in random seas was performed. Tests were first carried out on a typical tandem V foil system in various regular waves in both head and following seas to determine the response operator spectrum for the heaving and pitching motions. Irregular sea experiments with the same model were analyzed using spectral analysis techniques to obtain the wave spectrum and longitudinal motions spectra. Comparison between these spectra and those predicted using the regular sea response data and irregular wave spectrum indicated good agreement, with maximum deviation of about 20 in the range of significant wave energies. From this experiment, the linear superposition technique for predicting motions in random seas is seen to be valid to at least the same degree as for displacement vessels.