Date of Award
Master of Science in Ocean Engineering
To fully characterize a non-Gaussian random process, in addition to the ordinary power spectrum, higher order spectra are also needed. In the present study, the concentration is on the bispectrum of second-order nonlinear random wave elevation (a non-Gaussian process) at deep water site. Two approaches for calculating the wave bispectrum are included: analytical approach and simulated approach. The analytical approach developed in this study is different from that used by Hasselmann et al. (1963). The simulated approach involves first simulating non-Gaussian wave signals and then estimating the bispectrum from the wave signals. Under the sea state described by a Pierson-Moskowitz wave spectrum, the results show that the wave bispectra estimated by analytical and simulated approaches are in perfect agreement.
Yang, Zhaoqing, "BISPECTRAL ANALYSIS OF SECOND-ORDER NONLINEAR OCEAN WAVES" (1992). Open Access Master's Theses. Paper 2400.