Nonlinear and Dissipative Characteristics of a Combined Random-Cnoidal Wave Field
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Copyright © 2017 ASME. Images of the 2004 Indian Ocean tsunami at landfall shows a leading edge marked by short waves ("fission" waves). These waves appear to be cnoidal in shape and of a temporal and spatial scale in line with the longest swell present in the region, and may interact with the longer waves in the background random wave spectrum. As part of a comprehensive series of experiments, the Large Wave Flume at Oregon State University (USA) was used to generate and measure the properties of cnoidal, random, and combined cnoidal-random wave trains. Both the nonlinear energy transfer characteristics (via bispectral analysis) and dissipation characteristics (via a proxy dissipation function) are studied for all generated wave conditions. It is generally determined that the characteristics of the cnoidal wave dominate the combined cnoidal-random wave signals if the energy of the cnoidal wave is at least equal to that of the random wave.
author list (cited authors)
Kaihatu, J. M., Goertz, J. T., Ardani, S., & Sheremet, A.