No. 13 (1972), Conference Proceedings
No. 13 (1972)

NON-STATIONARY SPECTRUM ANALYSIS OF OCEAN WAVES

Conference Proceedings
Published 1972-01-29
Mehmet Aziz Tayfun
University of Delaware
Cheng Yi Yang
University of Delaware
George Chia-Chu Hsiao
University of Delaware
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Keywords

spectral analysis
non-stationary spectrum analysis

How to Cite

NON-STATIONARY SPECTRUM ANALYSIS OF OCEAN WAVES. (1972). Coastal Engineering Proceedings, 1(13), 11. https://doi.org/10.9753/icce.v13.11
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Abstract

Priestley's method [1, 2, 3] of non-stationary spectral analysis is extended to the case of digitally sampled records. A computation procedure previously proposed in an earlier work [4] is further investigated. This procedure compensates for the inherent difficulties in the theory and computes timedependent spectra from a sample in an iterative manner. Validities of the theory and the iterative procedure are tested with a simulated non-stationary process. Results establish a general agreement with theory, especially when spectra vary smoothly with time and frequency. Consequently, the procedure is applied to estimate non-stationary spectra for two wave records. A comparison is made between the non-stationary estimates and the stationary results derived from the same set of wave records.
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