Design and Simulation Tools for Moored Underwater Flexible Structures

Lee, Chun‐Woo; Lee, Jihoon; Choe, Moo-Youl; Lee, Gun-Ho

doi:10.5657/kfas.2010.43.2.159

Korean Journal of Fisheries and Aquatic Sciences

2010

DOI: 10.5657/kfas.2010.43.2.159

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Design and Simulation Tools for Moored Underwater Flexible Structures

Chun‐Woo Lee¹,

Jihoon Lee²,

Moo-Youl Choe³

et al.

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Cited by 2 publications

References 15 publications

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

Lee

Cha

Kim

2020

JMSE

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

Lee

Cha

Kim

2020

JMSE

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Analysis on underwater stability of the octagonal pillar type fish cage and mooring system

Yang¹,

Park²,

Lee³

et al. 2014

Journal of the Korean society of Fisheries Technology

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The sea cage in marine aquaculture might be varied such as on the stability and shape in the open sea by environmental factors.To evaluate the stability of net cage structures in the open sea, the physical and numerical modeling techniques were applied and compared with field observations. This study was carried out to analyse the stability and the volume loss which would have an effect on the fish swimming behavior in the octagonal pillar type fish cage under the open sea. As a results, the volume loss ratio of the fish cage as measured using a depth sensor was indicated a value of the 30.3% under the current velocity (1.1m/s).The fish cage should be consisted of a concrete block with a weight over 10 tons, a mooring rope diameter over 28mm PP, and a shackle of 25mm under the current speed of 1m/sec for reasonable stability.

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Design and Simulation Tools for Moored Underwater Flexible Structures

Cited by 2 publications

References 15 publications

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

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

Analysis on underwater stability of the octagonal pillar type fish cage and mooring system

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