A Study on the Radiation Forces Acting on a Submerged-Plate

Lee, Sang-Min; Kong, Gil-Young; Kim, Chol-Seong

Journal of Navigation and Port Research 2004;28(3):199-205.
Published online April 30, 2004.

몰수평판에 작용하는 Radiation 유체력에 관한연구

이상민, 공길영, 김철승

A Study on the Radiation Forces Acting on a Submerged-Plate

Sang-Min Lee, Gil-Young Kong, Chol-Seong Kim

Abstract

We have developed a composite grid method for the solution of the radiation problem. We divide the domain into two different grids; one is a moving grid system and the other is a fixed grid system. This numerical method is applied to calculation of the radiation forces generated by the submerged plate oscillating near a free surface. The experimental data are compared with the numerical ones obtained by the present method and a linear potential theory. As a result, we can confirm the accuracy of the present method. Finally we have evaluated the effect of nonlinear and viscous damping on the hydrodynamic forces acting on the submerged plate.

Key Words: radiation 유체력; Composite grid method;submerged-plate;Radiation force;Viscous damping force;Free surface effect