Chapter
Dec 31, 2015
Reflection and Transmission for a Porous Structure
Authors: Hideo Kondo and Satoshi TomaAuthor Affiliations
Publication: Coastal Engineering 1972
Abstract
Effects of characteristics of incident waves and of the thickenss of structure on wave reflection by and transmission through a porous structure were studied. Use of an idealized porous structure which is a lattice composed of circular cylinders was made. The relative thickness of structure B/L was found to have appreciable effects on reflected and transmitted wave energies.
The reflection coefficient Kr reaches to a maximum of it for B/L of about 0.2 to 0.25, then decreases as B/L increases, and remains approximately uniform for B/L larger than about 0.6. The transmission coefficient Kt, however, decreases nearly exponentially as B/L increases.
Measurement of wave height within structure revealed a pattern of standing waves having a loop at the front face and a node at the rear face of it. That relates to the trend of Kr.
Analytical approaches to predict the transmitted wave height, and wave heights before and within porous structures are found to be useful.
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Published In
Coastal Engineering 1972
Pages: 1847 - 1866
Copyright
© 1973 American Society of Civil Engineers.
History
Published online: Dec 31, 2015
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Authors
Affiliations
Hideo Kondo
Associate Professor
Department of Civil Engineering Muroran Institute of Technology Muroran, Japan
Satoshi Toma
Research Associate
Department of Civil Engineering Muroran Institute of Technology Muroran, Japan
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