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http://dx.doi.org/10.9765/KSCOE.2020.32.6.531

Numerical Simulation of Wave Pressure Acting on Caisson and Wave Characteristics near Tip of Composite Breakwater (for One Directional Irregular Waves)  

Jun, Jae-Hyoung (Department of Civil and Environmental Engineering, Korea Maritime and Ocean University)
Choi, Goon-Ho (Department of Civil and Environmental Engineering, Korea Maritime and Ocean University)
Lee, Kwang-Ho (Dept. of Civil Eng., Catholic Kwandong University)
Kim, Do-Sam (Dept. of Civil Eng., Korea Maritime and Ocean University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.32, no.6, 2020 , pp. 531-552 More about this Journal
Abstract
In the previous study, both the wave characteristics at the tip of composite breakwater and on caisson were investigated by applying olaFlow numerical model of three-dimensional regular waves. In this paper, the same numerical model and layout/shape of composite breakwater as applied the previous study under the action of one directional irregular waves were used to analyze two and three-dimensional spatial change of wave force including the impulsive breaking wave pressure applied to trunk of breakwater, the effect of rear region, and the occurrence of diffracted waves at the tip of caisson located on the high crested rubble mound. In addition, the frequency spectrum, mean significant wave height, mean horizontal velocity, and mean turbulent kinetic energy through the numerical analysis were studied. In conclusion, the larger wave pressure occurs at the front wall of caisson around the still water level than the original design conditions when it generates the shock-crushing wave pressure in three-dimensional analysis condition. Which was not occurred by two-dimensional analysis. Furthermore, it was confirmed that the wave pressure distribution at the caisson changes along the length of breakwater when the same significant incident wave was applied to the caisson. Although there is difference in magnitude, but its variation shows the similar tendency with the case of previous study.
Keywords
three dimensional-numerical analysis; irregular waves; olaFlow model; composite breakwater; diffracted waves; impulsive breaking wave pressure; mean wave height; mean horizontal velocity; mean turbulent kinetic energy;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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