Numerical analysis on the submerging characteristics of submersible fish cage system operated by compressed air

Kim, Sang Woo; Yang, Kyong-Uk

doi:10.3796/ksft.2007.43.1.038

Bulletin of the Korean society of Fisheries Technology

2007

DOI: 10.3796/ksft.2007.43.1.038

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Numerical analysis on the submerging characteristics of submersible fish cage system operated by compressed air

Sang Woo Kim¹,

Kyong-Uk Yang²

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Dynamic behavior of a submersible fish cage rigged with a circular floating and a sinking collar

Lee¹,

Lee²,

Choe³

et al. 2010

Journal of the Korean society of Fisheries Technology

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In this research, the submersible fish cage was designed to avoid structural and biological damage during harsh sea conditions. The submersible cage system consists of netting, mooring ropes, a floating collar, floats, sinkers and anchors. Whole elements of the cage were modeled on the mass-spring model. The computer simulations were carried out to investigate the dynamic behavior of the cage and to calculate mooring line tension subjected to tidal currents and waves. As expected, the tension values in the mooring line of the submerged position are 36% less compared to that of the surface cage under the same loading conditions. As the wave was used in combination with the current velocity of 1m/s, the average tensile load for the submerged cage showed 85% of the value for the floating cage. The simulation results provide an improved understanding of the behaviors of the structure and valuable information on the optimized design of the cage system exposed to open ocean environmental factors.

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Dynamic behavior of a submersible fish cage rigged with a circular floating and a sinking collar

Lee¹,

Lee²,

Choe³

et al. 2010

Journal of the Korean society of Fisheries Technology

View full text Add to dashboard Cite

show abstract

Analysis of submerging characteristics and stability of the model submersible fish cage operated by buoyancy control

Lee¹,

Cha²,

Jeong³

2012

Bulletin of the Korean society of Fisheries Technology

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This study aims to analyze the performance of a submersible fish cage which was designed for developing an economical cage system can be applied in korean aquaculture environment easily. To analyze the performance of the designed cage a model test was carried out. In the test, inclination changes of the upper frame and mooring tensions of model cage were measured during the submerging and surfacing motion in still water and wave condition (period: 2s, wave height: 0.1, 0.2, 0.3m). As a result, in the still water condition the model cage kept horizontal balance and inclination degree of the upper frame was about 1。 . In the wave condition, the model cage showed bilateral symmetric up-and-down motion but the average inclination degree of the upper frame was about 0 。 . When the model cage reached at a depth of 1m, the upand-down motion of the cage was decreased by 12% compared with that of at the surface (period 2s, height 0.3m). In the same wave condition, the maximum and average line tension under the bottom position were about 8% and 11% respectively compared with that of at surface.

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Numerical analysis on the submerging characteristics of submersible fish cage system operated by compressed air

Cited by 2 publications

References 0 publications

Dynamic behavior of a submersible fish cage rigged with a circular floating and a sinking collar

Dynamic behavior of a submersible fish cage rigged with a circular floating and a sinking collar

Analysis of submerging characteristics and stability of the model submersible fish cage operated by buoyancy control

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