Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Numerical Analysis of Hydrodynamic Performance of a Movable Submerged Breakwater Using Energy Dissipation Model

에너지 소산 모델을 이용한 잠수된 가동식 방파제의 유체동역학적 성능 수치해석

  • Kim, Do-Hyun (STX Offshore & Shipbuilding Ltd. Research Institute of Technology) ;
  • Koo, Weon-Cheol (School of Naval Architecture and Ocean Engineering, University of Ulsan)
  • 김도현 (STX조선해양 기술연구소) ;
  • 구원철 (울산대학교 조선해양공학부)
  • Received : 2011.12.19
  • Accepted : 2012.06.07
  • Published : 2012.08.20
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Abstract

Hydrodynamic performance of a movable submerged breakwater was analyzed using energy dissipation model. Based on two-dimensional boundary element method the equation of motion including a viscous dissipation term proportional to velocity squared was solved by Newton-Raphson method. Energy dissipation coefficients as well as reflection and transmission coefficients of a submerged flat plate were calculated with various plate lengths and thickness. Both real and imaginary components of body displacement and forces were used to solve the motion of breakwater accurately. The effect of the magnitude of dissipation coefficient on the body displacement was evaluated. The results from the potential theory with no dissipation term were found to be an overestimate in resonance frequency.

Keywords

Acknowledgement

Supported by : 울산대학교

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