Interpretation of Wave Energy Spectra
Guidelines for interpreting nondirectional wave energy spectra are presented. A simple method is given for using the spectrum to estimate a significant height and period for each major wave train in most sea states. The method allows a more detailed and accurate description of ocean surface waves than that given by a single significant height and period, yet it eliminates much of the formidable detail of a full spectrum. An example problem illustrating application of the method is presented. Spectral analysis and display techniques, and the natural variation of spectra in space and time, are discussed. (Author).
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Af)j amplitude applied Army Coastal Engineering autocovariance function Celsius CERC Coastal Engineering Research Energy and Significant energy density values Engineering Research Center equation estimate a significant Fahrenheit Frequency and Period full spectrum height and period highest peak highest spectral peak hr e.s Huntington Beach independent wave trains interpreting nondirectional wave ith highest spectral main peak major peaks major secondary peaks major secondary spectral major spectral peaks major wave trains method nondirectional wave energy ocean surface waves percent period corresponding pier end depth procedures radians per second represent a gage representing the lower rH o rH sea-surface elevation secondary spectral peaks shown in Figure significant wave height single significant height smoothing functions spatial variations Spectral analysis spectral component spectral energy density spectrum to estimate U.S. Army velocity and acceleration water depth wave energy spectra wave field wave height corresponding wave period