METHOD FOR ESTIMATING DIRECTIONAL WAVE SPECTRUM IN INCIDENT AND REFLECTED WAVE FIELD

Masahiko Isobe; Kosuke Kondo

doi:10.9753/icce.v19.32

No. 19 (1984), Conference Proceedings

No. 19 (1984)

METHOD FOR ESTIMATING DIRECTIONAL WAVE SPECTRUM IN INCIDENT AND REFLECTED WAVE FIELD

Conference Proceedings

https://doi.org/10.9753/icce.v19.32

Published 1984-01-29

Masahiko Isobe⁺⁻
Kosuke Kondo⁺⁻

Masahiko Isobe

Department of Civil Engineering, Yokohama National University

Kosuke Kondo

Design and Engineering Department, Penta-Ocean Construction Co., Ltd

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Keywords

wave spectrum
wave direction
wave field
incident wave field
reflected wave field

How to Cite

Isobe, M., & Kondo, K. (1984). METHOD FOR ESTIMATING DIRECTIONAL WAVE SPECTRUM IN INCIDENT AND REFLECTED WAVE FIELD. Coastal Engineering Proceedings, 1(19), 32. https://doi.org/10.9753/icce.v19.32

Abstract

The relationship between the directional spectrum and the crosspower spectra in an incident and reflected wave field differs from the situation with no reflected waves because the phase lag between the incident and reflected waves is not random. Extra terms, which may be called phase interaction terms, exist. Hence standard methods for estimating the directional spectrum are not applicable. In the present study, the MLM is modified for this situation and the method is termed the MMLM (Modified Maximum Likelihood Method). The validity of the MMLM is examined by numerical simulation. The results indicate that the MMLM has a high resolution power. Formulas to determine the reflection coefficient are derived and their accuracy and suitability are examined.

https://doi.org/10.9753/icce.v19.32

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METHOD FOR ESTIMATING DIRECTIONAL WAVE SPECTRUM IN INCIDENT AND REFLECTED WAVE FIELD

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