On Study of the Effects of External Forces on the Fish Farm Structure Due to Following Flows and Currents in Fully Operated Ship's Propeller

선박 프로펠러 후류 및 조류에 의해 발생한 힘이 가두리 양식장 구조물에 미치는 영향에 관한 연구

  • Lee, Kwi-Joo (Dept. Naval Archi. & Ocean Eng., College of Eng., Chosun University) ;
  • Ra, Young-Kon (Dept. Naval Archi. & Ocean Eng., College of Eng., Chosun University) ;
  • Kim, Kyoung-Hwa (Dept. Naval Archi. & Ocean Eng., College of Eng., Chosun University) ;
  • Ryu, Tae-Ho (Hyundai Mipo Dockyard Co. Ltd.)
  • 이귀주 (조선대학교 항공조선공학부 선박해양공학과) ;
  • 라영곤 (조선대학교 항공조선공학부 선박해양공학과) ;
  • 김경화 (조선대학교 항공조선공학부 선박해양공학과) ;
  • 류태호 (현대미포조선(주) 종합설계부)
  • Published : 2002.10.25

Abstract

This report describes the effects of following flaws due to ship's propeller on the fish farm structure when the ship's propeller is operated in full power. This study is applied an incompressible newtonian fluid theory, which is governed the Navier-Stokes equation. For the numerical solution, Neumann equation are applied as the boundary conditions. The result shows that the flow velocity near the fish farm is 1.0 m/sec. The actual measurement carries out by using propeller type velocimeter in order to measure the velocity of following flows and currents around the fish farm area. The result shows that the maximum velocity near the fish farm structure is 1.2 m/sec in depth of 1.5 m. This velocity is used for calculation of external force on the fish farm structure. The results of structural strength of the fish farm structures show that the actual maximum bending moment and bending stress are less than the damage strength of material. So the fish farm structure is not affected by the following flows and currents of ship's propeller.

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