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Nonlinear Dynamic Responses among Wave, Submerged Breakwater and Seabed  

HAN DONG SOO (Institute of Marine Industry, Division of Civil and Environmental Engineering, Gyeongsung National University)
KIM CHANG HOON (Division of Construction and Environmental Engineering, Graduate School, Korea Maritime University)
YEOM CYEONG SEON (Division of Civil and Environmental Engineering, Graduate School, Gyeungsang National University)
KIM DO SAM (Division of Construction and Environmental Engineering, Korea Marine University)
Publication Information
Journal of Ocean Engineering and Technology / v.19, no.6, 2005 , pp. 35-43 More about this Journal
Abstract
Recently, various-shaped coastal structures have been studied and developed. Among them, the submerged breakwater became generally known as a more effective structure than other structures, bemuse it not only serves its original function, but also has the ability to preserve the coastal environment. Most previous investigations have been focused on the wave deformation and energy dissipation due to submerged breakwater, but less interest was given to their internal properties and dynamic behavior of the seabed foundation under wave loadings. In this study, a direct numerical simulation (DNS) is newly proposed to study the dynamic interaction between a permeable submerged breakwater aver a sand seabed and nonlinear waves, including wave breaking. The accuracy of the model is checked by comparing the numerical solution with the existing experimental data related to wave $\cdot$ permeable submerged breakwater $\cdot$ seabed interaction, and showed fairly nice agreement between them. From the numerical results, based on the newly proposed numerical model, the properties of the wave-induced pore water pressure and the flow in the seabed foundation are studied. In relation to their internal properties, the stability oj the permeable submerged breakwater is discussed.
Keywords
Direct Numerical Simulation; Submerged Breakwater; Seabed; Pore Water Pressure; Flow;
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