경사식 방파제의 수리특성 결정을 위한 수치해석

Abstract

A numerical method to efficiently secure necesary design informations of the hydraulic character-istics of rubble mound breakwater was attempted here. The method combines the exterior wave field with theinterior wave field which is formulated incorporating porous media flow inside the breakwater. An approximatemethod based on the long wave assumption was used for the exterior wave field while a boundary elementmethod was used for the interior wave field. A hydraulic experiment was also performed to verify the validity ofthe numerical analysis. The numerical results were compared with experimental data and results from existingformulae. They generally agreed in both reflection and transmission coeficients. The calculated pore presuresalso showed a similar pattern with experimental data, even if they gave some significant diferences in theirvalues for some cases. The main cause of such diferences can be atributed to the strongly nonlinear wave fieldocuring on the frontal slope of the breakwater. The direct input of dynamic presures(measured from hydraulicexperiment) into the numerical method was suggested as a promising method to enhance the predictability ofpore pressures.