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Wave Deformation and Blocking Performance by a Porous Dual Semi-Cylindrical Structure  

Cho, Il-Hyoung (Department of Ocean System Engineering, Jeju National University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.22, no.1, 2010 , pp. 10-17 More about this Journal
Abstract
The interaction of oblique incident waves with a porous dual semi-cylindrical structure is investigated under the assumption of linear potential theory. The porous dual semi-cylindrical structure consists of two concentric bottom-mounted cylindrical structures that are porous in front half and transparent in back half. By changing porosity, gap, and wave characteristics(wave frequencies, incidence angle), the wave blocking performance as well as the wave loads and the wave run-up are obtained. As a convenient measure of overall wave blocking performance, the root mean square(R.M.S.) of the wave elevation in a sheltered region is used. It is found that the porous semi-cylindrical structure may significantly reduce the wave response in a sheltered region and the wave forces decrease largely compared to the impermeable structure. The dual structure is more effective in reducing the wave response in a sheltered region than the mono type in the region of high frequencies.
Keywords
porous semi-cylindrical structure; wave deformation; eigenfunction expansion method; wave force; wave run-up;
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Times Cited By KSCI : 3  (Citation Analysis)
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