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Reflection and Transmission of Regular Waves by Multiple-Row Curtainwall-Pile Breakwaters  

Suh, Kyung-Duck (School of Civil, Urban and Geosystem Engineering and Engineering Research Institute, Seoul National University)
Ji, Chang-Hwan (School of Civil, Urban and Geosystem Engineering, Seoul National University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.18, no.2, 2006 , pp. 97-111 More about this Journal
Abstract
Using the eigenfunction expansion method, a mathematical model has been developed to calculate the reflection and transmission of regular waves from a multiple-row curtainwall-pile breakwater. In addition, hydraulic model experiments have been conducted with different values of porosities between the piles, drafts of the curtain walls, and distances between the rows of the breakwater. It is found that the reflection and transmission coefficients decrease and increase, respectively, with decreasing relative water depth, but they bounce to increase and decrease, respectively, as the relative water depth decreases further. When either the porosity between the piles or the draft of the curtain wall is changed with other parameters fixed, the relative magnitudes of the reflection and transmission coefficients have been changed, but the general trend remained the same. When the wavelength is the same as the distance between the rows of the breakwater, a rapid change was observed for the reflection and transmission coefficients. A good agreement between the measurement and prediction was also founded for three-row breakwaters.
Keywords
curtainwall-pile breakwaters; reflection coefficients; transmission coefficients; eigenfunction expansion method;
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