계류된 수중 유연구조물의 설계 및 시뮬레이션 도구 개발
Design and Simulation Tools for Moored Underwater Flexible Structures
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초록
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.
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.
참고문헌 (22)
- Aarsnes JV, "Current force on cage, net deflection, Engineering for Offshore Fish Farming", pp.137~152 (1990), Tomas Telford
- Choi J, "A Study on Performance Analysis of a Fish Cage using Air Chamber Structure", J Kor Soc Nav Arch, 43, pp.119~127 (2006)
- Fredriksson DW, "Fish cage and mooring system dynamics using physical and numerical models with field measurements", Aquacultural Engineering, 27, pp.117~146 (2003)
- Fredriksson DW, "Development of structural modeling techniques for evaluating HDPE plastic net pens used in marine aquaculture", Ocean Engineering, 34, pp.2124~2137 (2007)
- Gere JM, "Mechanics of Materials, 7th ed", pp.68~71 (2009), Cengage Learning
- Huang CC, "Modeling volume deformation in gravity-type cages with distributed bottom weights or a rigid tube-sinker", Aquacultural Engineering, 37, pp.144~157 (2007)
- Huang CC, "Effects of waves and currents on gravity-type cages in the open sea", Aquacultural Engineering, 38, pp.105~116 (2008)
- Jeong GC, "Dynamic Behavior of Model Set Net in the Flow", 석사, pp.1997
- Jeong SJ, "Ein Beitrag zur Erzeugung nichtlinearer Entwurfsseegänge im numerischen Wellenkanal", 박사, pp.2003
- Kim HY, "Dynamic simulation of the behavior of purse seine gear and sea-trial verification", Fisheries Research, 88, pp.109~119 (2007)
- study of development for an improved set net, "Lee JH", Ministry of Maritime Affairs and Fisheries Report, 21~86 (1998)
- Lee CW, "Physical modeling for underwater flexible systems dynamic simulation", Ocean Engineering, 32, pp.331~347 (2005)
- Development of the design and analysis system for pound net, "Lee CW", Ministry of Maritime Affairs and Fisheries Report, 122~157 (2006)
- Lee CW, "Dynamic simulation of a fish cage system subjected to currents and waves", Ocean Engineering, 35, pp.1521~1532 (2008)
- Li YC, "Numerical simulation of the hydrodynamic behaviour of submerged plane nets in current", Ocean Engineering, 33, pp.2352~2368 (2006)
- Teori for beregning av nøter, Krefter og gjennomstrømning på enkeltpanel og merdsystem, "Løland G", ~, pp.MARINTEK Rapport No OR 513039.00.02.88 (1988)
- Takaki T, "Validity and layout of "NaLA": a net configuration and loading analysis system", Fisheries Research, 66, pp.235~243 (2004)
- Tsukrov I, "Finite element modeling of net panels using a consistent net element", Ocean Engineering, 30, pp.251~270 (2003)
- Wakaba L, "On the added mass force at finite Reynolds and acceleration numbers", J Theor Comput Fluid Dyn, 21, pp.147~153 (2007)
- 윤일부, "정치망 어구어법의 개발에 관한 연구 Ⅰ- 현용어구의 흐름에 대한 형상 변화", 한국어업기술학회지, 40(4), pp.268~281 (2004), 한국어업기술학회
- 윤일부, "부가중량추에 따른 모형 정치망의 형상변화- 운동장이 潮上側인 경우 -", 한국어업기술학회지, 41(1), pp.17~26 (2005), 한국어업기술학회
- Zhao YP, "A numerical study on dynamic properties of the gravity cage in combined wave-current flow", Ocean Engineering, 34, pp.2350~2363 (2007)