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http://dx.doi.org/10.5657/kfas.2010.43.2.159

Design and Simulation Tools for Moored Underwater Flexible Structures  

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)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.43, no.2, 2010 , pp. 159-168 More about this Journal
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
Fish cage systems; Set net systems; Underwater flexible structures; Dynamic simulation; Mathematical model;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Zhao YP, Li YC, Dong GH, Gui FK and Teng B. 2007. A numerical study on dynamic properties of the gravity cage in combined wave-current flow. Ocean Engineering 34, 2350-2363.   DOI
2 Aarsnes JV, Rudi H and Loland G. 1990. Current force on cage, net deflection, Engineering for Offshore Fish Farming, Tomas Telford, London, U.K., 137-152.
3 Lee CW, Lee JH, Cha BJ, Kim HY and Lee JH. 2005. Physical modeling for underwater flexible systems dynamic simulation. Ocean Engineering 32, 331-347.   DOI
4 Lee CW, Lee JH, Kwon BG, Kim HS, Shin JK, Cha BJ, Jeong SJ, Lee MW and Lee GH. 2006. Development of the design and analysis system for pound net. Ministry of Maritime Affairs and Fisheries Report. Korea, 122-157.
5 Lee CW, Kim YB, Lee GH, Choe MY, Lee MK and Koo KY. 2008. Dynamic simulation of a fìsh cage system subjected to currents and waves. Ocean Engineering 35, 1521-1532.   DOI
6 Tsukrov I, Eroshkin O, Fredriksson DW, Swift MR and Celikkol B. 2003. Finite element modeling of net panels using a consistent net element. Ocean Engineering 30, 251-270.   DOI
7 Li YC, Zhao YP, Gui FK and Teng B. 2006. Numerical simulation of the hydrodynamic behaviour of submerged plane nets in current. Ocean Engineering 33, 2352-2368.   DOI
8 Loland land G, Rudi H and Aarsnes JV. 1988. Teori for beregning av noter, Krefter og gjennomstromnig mning pa enkeltpanel og merdsystem. MARINTEK Rapport No OR 513039.00.02.88.
9 Takaki T, Shimizu T, Suzuki K, Hiraishi T and Yamamoto K. 2004. Validity and layout of "NaLA"; a net confìguration and loading analysis system. Fisheries Research 66, 235-243.   DOI
10 Wakaba L and Balachandar S. 2007. On the added mass force at finite Reynolds and acceleration numbers. J Theor Comput Fluid Dyn 21, 147-153.   DOI
11 Yun IB, Lee JH, Kwon BG, Cho YB, Yoo JB, Kim SH and Kim BY. 2004. A study on improvement for fìshing gear and method of pound net-. J Kor Soc Fish Tech 40, 268-281.   DOI
12 Yun IB, Lee JH, Kwon BG, Yoo JB and Cho YB. 2005. Shape of the model pound net according to added sinker-In case of the upperward flow with fìsh court net-. J Kor Soc Fish Tech 41, 17-26.   DOI
13 Choi J, Kim SY, Kim DE and Jeong SJ. 2006. A Study on Performance Analysis of a Fish Cage using Air Chamber Structure. J Kor Soc Nav Arch 43, 119-127.   DOI
14 Fredriksson DW, Swift MR, Irish JD, Tsukrov I and Celikkol B. 2003. Fish cage and mooring system dynamics using physical and numerical models with field meawurements. Aquacultural Engineering 27, 117-146.   DOI
15 Huang CC, Tang HJ and Liu JY. 2008. Effects of waves and currents on gravity-type cages in the open sea. Aquacultural Engineering 38, 105-116.   DOI
16 Fredriksson DW, DeCew JC and Tsukrov I. 2007. Development of structural modeling techniques for evaluating HDPE plastic net pens used in marine aquaculture. Ocean Engineering 34, 2124-2137.   DOI
17 Gere JM and Goodno BJ. 2009. Mechanics of Materials, 7th ed. Cengage Learning. Toronto, Canada. 68-71.
18 Huang CC, Tang HJ and Liu JY. 2007. Modeling volume deformation in gravity-type cages with distributed bottom weights or a rigid tube-sinker. Aquacultural Engineering 37, 144-157.   DOI
19 Jeong GC. 1997. Dynamic Behavior of Model Set Net in the Flow. Master Thesis, Pukyong National University, Busan, Korea, 4-26.
20 Jeong SJ. 2003. Ein Beitrag zur Erzeugung nichtlinearer Entwurfsseegange im numerischen Wellenkanal, PhD Thesis, Teehnische Universitat Berlin, Berlin, Germany, 9-42.
21 Kim HY, Lee CW, Shin JK, Kim HS, Cha BJ and Lee GH. 2007. Dynamic simulation of the behavior of purse seine gear and sea-trial verification. Fisheries Research 88, 109-119.   DOI
22 Lee JH, Kim JK, Lee DJ, Lee CW, Shin HO, Kwon BG, An YI and Kim HY. 1998. A study of development for an improved set net. Ministry of Maritime Aftairs and Fisheries Report. Korea. 21-86