Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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A Study on the Radiation Forces Acting on a Submerged-Plate

몰수평판에 작용하는 Radiation 유체력에 관한 연구

  • Lee, Sang-Min (Dept. of Ship Operation Systems Engineering, Korea Maritime University) ;
  • Kong, Gil-Young (Dept. of Ship Operation Systems Engineering, Korea Maritime University) ;
  • Kim, Chol-Seong (Div. of Maritime Transportation System, Mokpo National University)
  • 이상민 (한국해양대학교) ;
  • 공길영 (한국해양대학교 운항시스템공학) ;
  • 김철승 (목포해양대학교 해상운송시스템학부)
  • Published : 2004.04.01
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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, Lie have evaluated the effect of nonlinear and viscous damping on the hydrodynamic forces acting on the submerged plate.

라디에이션(radiation) 문제를 해결하기 위해서 중합격자법을 개발하였다. 중합격자계는 이동격자계와 고정격자계로 이루어져 있으며, 이동격자계는 운동하는 물체에 적용되어 운동하는 물체와 동시에 이동된다. 이러한 수치계산법은 자유표면 부근에서 운동하는 몰수평판에 작용하는 라디에이션 유체력을 계산하는데 응용되었다. 현재의 수치계산법에 의한 결과는 실험값 및 선형포텐셜 이론에 의한 결과와 상호 비교하였으며, 수치계산의 신뢰성을 확인하였다. 그리고, 몰수평판에 작용하는 비선형 점성감쇄효과에 대하여 평가하였다.

Keywords

References

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