A Study on the Minimization of Mooring Load in Fish-Cage Mooring Systems with a Damping Buoy

This study established the conditions in which mooring load is minimized in a fish cage that includes a damping buoy in specific wave conditions. To derive these conditions, numerical simulations of various mooring contexts were conducted on a fish cage (1/15 scale) using a simplified mass-spring mo...

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Main Authors: Gun-Ho Lee, Bong-Jin Cha, Hyun-young Kim
Format: Article
Language:English
Published: MDPI AG 2020-10-01
Series:Journal of Marine Science and Engineering
Subjects:
Online Access:https://www.mdpi.com/2077-1312/8/10/814
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author Gun-Ho Lee
Bong-Jin Cha
Hyun-young Kim
author_facet Gun-Ho Lee
Bong-Jin Cha
Hyun-young Kim
author_sort Gun-Ho Lee
collection DOAJ
description This study established the conditions in which mooring load is minimized in a fish cage that includes a damping buoy in specific wave conditions. To derive these conditions, numerical simulations of various mooring contexts were conducted on a fish cage (1/15 scale) using a simplified mass-spring model and fifth-order Stokes wave theory. The simulation conditions were as follows: (1) bridle-line length of 0.8–3.2 m; (2) buoyancy of 2.894–20.513 N for the damping buoy; and (3) mooring-rope thickness of 0.002–0.004 m. The wave conditions were 0.333 m in height and 1.291–2.324 s of arrival period. Consequently, the mooring tensions tended to decrease with decreasing mooring line thickness and increasing bridle-line length and buoyancy of the buoy. Accordingly, it was assumed to be advantageous to minimize the mooring tension by designing a thin mooring line and long bridle line and for the buoyancy of the buoy to be as large as possible. This approach shows a valuable technique because it can contribute to the improvement of the mooring stability of the fish cage by establishing a method that can be used to minimize the load on the mooring line.
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spelling doaj.art-00765f87c92b4faca251aaf5393e87952023-11-20T17:43:26ZengMDPI AGJournal of Marine Science and Engineering2077-13122020-10-0181081410.3390/jmse8100814A Study on the Minimization of Mooring Load in Fish-Cage Mooring Systems with a Damping BuoyGun-Ho Lee0Bong-Jin Cha1Hyun-young Kim2Fisheries Resources and Environment Division, West Sea Fisheries Research Institute, NIFS, Incheon 22383, KoreaFisheries Engineering Division, National Institute of Fisheries Science, Busan 46083, KoreaFisheries Resources and Environment Division, West Sea Fisheries Research Institute, NIFS, Incheon 22383, KoreaThis study established the conditions in which mooring load is minimized in a fish cage that includes a damping buoy in specific wave conditions. To derive these conditions, numerical simulations of various mooring contexts were conducted on a fish cage (1/15 scale) using a simplified mass-spring model and fifth-order Stokes wave theory. The simulation conditions were as follows: (1) bridle-line length of 0.8–3.2 m; (2) buoyancy of 2.894–20.513 N for the damping buoy; and (3) mooring-rope thickness of 0.002–0.004 m. The wave conditions were 0.333 m in height and 1.291–2.324 s of arrival period. Consequently, the mooring tensions tended to decrease with decreasing mooring line thickness and increasing bridle-line length and buoyancy of the buoy. Accordingly, it was assumed to be advantageous to minimize the mooring tension by designing a thin mooring line and long bridle line and for the buoyancy of the buoy to be as large as possible. This approach shows a valuable technique because it can contribute to the improvement of the mooring stability of the fish cage by establishing a method that can be used to minimize the load on the mooring line.https://www.mdpi.com/2077-1312/8/10/814mooring loadfish cagemass-springnumerical analysisfifth-order Stokes wave
spellingShingle Gun-Ho Lee
Bong-Jin Cha
Hyun-young Kim
A Study on the Minimization of Mooring Load in Fish-Cage Mooring Systems with a Damping Buoy
Journal of Marine Science and Engineering
mooring load
fish cage
mass-spring
numerical analysis
fifth-order Stokes wave
title A Study on the Minimization of Mooring Load in Fish-Cage Mooring Systems with a Damping Buoy
title_full A Study on the Minimization of Mooring Load in Fish-Cage Mooring Systems with a Damping Buoy
title_fullStr A Study on the Minimization of Mooring Load in Fish-Cage Mooring Systems with a Damping Buoy
title_full_unstemmed A Study on the Minimization of Mooring Load in Fish-Cage Mooring Systems with a Damping Buoy
title_short A Study on the Minimization of Mooring Load in Fish-Cage Mooring Systems with a Damping Buoy
title_sort study on the minimization of mooring load in fish cage mooring systems with a damping buoy
topic mooring load
fish cage
mass-spring
numerical analysis
fifth-order Stokes wave
url https://www.mdpi.com/2077-1312/8/10/814
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