Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Design and Simulation Tools for Moored Underwater Flexible Structures

계류된 수중 유연구조물의 설계 및 시뮬레이션 도구 개발

  • Lee, Chun-Woo (Division of Marine Production System Management, Pukyong National University) ;
  • Lee, Ji-Hoon (Institute of Low-Carbon Marine Production Technology, Pukyong National University) ;
  • Choe, Moo-Youl (Department of Fisheries Physics, Pukyong National University) ;
  • Lee, Gun-Ho (Fisheries System Engineering Division, National Fisheries Research and Development Institute)
  • 이춘우 (부경대학교 해양생산시스템관리학부) ;
  • 이지훈 (부경대학교 저탄소해양생산기술연구소) ;
  • 최무열 (부경대학교 수산물리학과) ;
  • 이건호 (국립수산과학원 시스템공학과)
  • Received : 2009.11.10
  • Accepted : 2010.04.12
  • Published : 2010.04.30
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Abstract

This paper presents a mathematical model and simulation method for investigating the performance of set net systems and fish cage systems influenced by currents and waves. Both systems consist of netting, mooring ropes, a floating collar and sinkers. The netting and ropes were considered flexible structures and the floating collar was considered an elastic structure. Both were modeled on a mass-spring model. The structures were divided into finite elements and mass points were placed at the mid-point of each element, and the mass points were connected by mass-less springs. Each mass point was subjected to external and internal forces and the total force was calculated at every integration step. An implicit integration scheme was used to solve the nonlinear dynamic system. The computation method was applied to dynamic simulation of actual systems simultaneously influenced by currents and waves in order to evaluate their practicality. The simulation results improved our understanding of the behavior of the structure and provided valuable information concerning the optimized design of set net and fish cage systems exposed to an open ocean environment.

Keywords

References

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