A Case Study for an Offshore Structure for Aquaculture: Comparison of Analysis With Model Testing

Berstad, Are Johan; Aarsnes, J

doi:10.1115/omae2018-78542

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…The dynamic simulation of the aquaculture net cage was conducted using AquaSim® (Aquastructures), a numerical analysis software based on the Finite Element Method (FEM), This tool has been widely utilized in the field of aquaculture and for various types of farming systems as such as (Berstad & Aarsnes, 2018; López et al, 2017; Milich & Drimer, 2019). AquaSim performs a global analysis of the forces transmitted between rigid and flexible components, being able to calculate displacement, acceleration, velocity, and deformations in the components of the structures.…”

Section: Methodsmentioning

confidence: 99%

Structural integrity of a submersible sea cage exposed to extreme oceanographic conditions

López,

Hurtado,

Toledo

et al. 2024

J World Aquaculture Soc

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This study focuses on the structural integrity analyses of a submersible cage with dimensions of 20 m in diameter and 10 m depth under extreme oceanographic conditions, including current speed of 0.5 and 1 m/s, combined with waves ranging from 2 to 5 m in height and a period of 7 s. Employing a dynamic simulation model based on finite elements, The study examines the stresses in the cage´s pipes, as well as the tension in the bridle lines and mooring lines. Results indicate that submerging the cage leads to a reduction in peak tensions, with mooring lines experiencing a decrease of up to 32% and bridle lines experiencing a decrease of up to 59%. Furthermore, the stresses in the pipes exhibit a significant decline of up to 71.4%. These findings demonstrate that the submersible cage, when submerged, significantly reduces peak stresses, thereby decreasing the risk of structural loss or damage when the system is submerged.

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Section: Methodsmentioning

confidence: 99%

Structural integrity of a submersible sea cage exposed to extreme oceanographic conditions

López,

Hurtado,

Toledo

et al. 2024

J World Aquaculture Soc

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“…For the structural methods, various methods were proposed to assess the structural responses of different components of the fish cage system. A mass-spring model [11] or a truss model [12] was used to calculate the motions and deformations of the aquaculture nets, mooring lines and bridles. A rigid body model [13] or beam model [12] was adopted to model the motions and deformations of the floating collars and the sinker tubes.…”

Section: Introductionmentioning

confidence: 99%

“…A mass-spring model [11] or a truss model [12] was used to calculate the motions and deformations of the aquaculture nets, mooring lines and bridles. A rigid body model [13] or beam model [12] was adopted to model the motions and deformations of the floating collars and the sinker tubes.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of a single point mooring submersible fish cages in waves and current

Wen,

Cheng,

Ong

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Submersible fish cages are designed for installing in the open sea sites that are subjected to violent sea conditions to reduce the hydrodynamic forces acting on the fish cages. To assess the dynamic responses of a single point mooring submersible fish cage under the rough sea conditions, a numerical model including hydrodynamic and structural methods is proposed. The waves and current are modelled using the airy wave theory. For the floating collars and sinker tube, the Morison model is adopted to calculate the hydrodynamic force and the modal superposition method is proposed to calculate the structural responses. For the aquaculture net, the screen model is adopted to calculate the hydrodynamic force and the extended position-based dynamics (XPBD) method is proposed to obtain the structural deformations. The hydrodynamic dynamic forces and the deformations of the fish cages are compared between the fish cages on water surface and in deep water. Results show that when the fish cage is submerged 20m from the water surface, the average horizontal force is reduced by 30% and the variation of the horizontal force is reduced by 81%. Significant reductions in the deformation of the floating collars are observed. Therefore, using submersible fish cage can help reduce physical stress and avoid structural damage for the fish cage system. In addition, the coupling of XPBD and MS can provide a quick solution for the structural modelling of the fish farm system, which can be utilized at the initial stage of fish farm design.

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Typical hydrodynamic models for aquaculture nets: A comparative study under pure current conditions

Cheng

Aarsæther

et al. 2020

Aquacultural Engineering

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A Case Study for an Offshore Structure for Aquaculture: Comparison of Analysis With Model Testing

Cited by 4 publications

References 2 publications

Structural integrity of a submersible sea cage exposed to extreme oceanographic conditions

Structural integrity of a submersible sea cage exposed to extreme oceanographic conditions

Dynamic response of a single point mooring submersible fish cages in waves and current

Typical hydrodynamic models for aquaculture nets: A comparative study under pure current conditions

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