Stress analysis of a submersible longline culture system through dynamic simulation

López, J.; Hurtado, Carlos; Gómez, Allan; Zamora, Víctor; Queirolo, Dante; Gutierrez, A.

doi:10.3856/vol45-issue1-fulltext-3

Cited by 14 publications

(5 citation statements)

References 11 publications

(14 reference statements)

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“…Properties of the mooring configuration for the test setups are summarized in Tables 1-3. This system with submerged crop lines is expected to experience less load on the mooring line as it is submerged deeper [7]. Despite the protection from the surface waves, the submerged longline system is still in high risks of system failures (anchor loss, buoy immersion, line breakage), due to storms [22].…”

Section: Field Sitementioning

confidence: 99%

“…Furthermore, the submerged mussel crops would be less influenced by surface waves, lessening the risk of system break or mussel detachment. A study to determine the influence of crop lines' submergence in scallop longline culture has been done by performing a dynamic simulation with a FEM (Finite Element Method) based software [6,7]. The conclusion of the study was that the decrease in the stress on the mooring line could achieve 55% as the crop lines are submerged deeper [7].…”

Section: Introductionmentioning

confidence: 99%

“…A study to determine the influence of crop lines' submergence in scallop longline culture has been done by performing a dynamic simulation with a FEM (Finite Element Method) based software [6,7]. The conclusion of the study was that the decrease in the stress on the mooring line could achieve 55% as the crop lines are submerged deeper [7]. Lien and Fredheim [8] performed dynamic analysis of mussel longline and mussel longtube system using FEM based software [9] originally used for offshore riser analysis.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Modelling of a Mussel Line System by Means of Lumped-Mass Approach

Pribadi¹,

Donatini²,

Lataire³

2019

JMSE

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This paper describes a numerical model to simulate the behavior of a mussel longline system, subjected to environmental loads such as waves and current. The mussel line system consists of an anchor, a mooring chain, a long backbone line, mussel collector lines and buoys. The lumped-mass open-source code MoorDyn is modified for the current application. Waves are modelled as a directional spectrum, and the current as a homogeneous velocity field with an exponential vertical distribution. A Coulomb model is implemented to model the horizontal friction between nodes and the seabed. Cylindrical buoys with three translational degrees-of-freedom are modelled by extending the simplified hydrodynamic model in use for line’s internal nodes with additional properties like cylinder height, diameter and mass. Clump weights are modelled in a similar way. For validation purposes, the results of the present software are compared with the commercially available lumped-mass based mooring dynamic software, OrcaFlex.

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Section: Field Sitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Modelling of a Mussel Line System by Means of Lumped-Mass Approach

Pribadi¹,

Donatini²,

Lataire³

2019

JMSE

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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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“…Regarding the longline hydrodynamic behavior, the shape, position, and balance of this type of structure located in the sea directly depend on the force's magnitude and direction acting on it. Therefore, for every kind of structure, there is a defined pattern for the action of the external forces (López et al, 2017). On this topic, Fridman (1986) divides these forces into gravitational, hydrostatic and hydrodynamic forces (which are the product of the pressure exerted by the body of water on the structure), friction force (generated by the reaction of the seafloor), wave action forces, and additional forces caused by the management of the system (Berteaux, 1976;Baranov, 1977;Fridman, 1981).…”

Section: The Theoretical Framework Of Scale Modelsmentioning

confidence: 99%

Deadweight anchoring behavior for aquaculture longline

Trujillo

León²,

Martínez

2020

Lat. Am. J. Aquat. Res.

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The similarity theory was used to study the behavior of five anchoring and one "rezon" type deadweight designs, using scale models. The surface sediments extracted from Charagato Bay, Cubagua Island, were characterized to evaluate the efficiency of these models on these substrates. A test structure consisting of a tank with a mixture of sediment and seawater, and a metal trestle was used. Tension variables were considered, using a 6 mm PE end section. Weights were added at one of its ends which represented the longline system's resistance force and at the other the model's force in the eyebolt (Tc) representing the gripping force due to the interaction of the anchoring design with the substrate, and the static rupture tension (Tr) upon the weight (Pm) of each model, against different anchoring attack angles (), aspect ratios (AR) 1/2.5; 1/3.0; 1/3.5, and 1/4.0; sail attack angles () of 0, 10, and 20°, and the efficiency index (EI) of each model. The Kruskal-Wallis contrast was used to detect the possible differences against different anchoring attack angles, and, to locate the differences between them; box and mustache graphs were used. The most effective model on very fine sandtype sediment was the pyramidal with the claw-like frame, followed by the pyramidal with the shovel-like frame and the "rezon" type traditionally used on Margarita Island.

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Stress analysis of a submersible longline culture system through dynamic simulation

Cited by 14 publications

References 11 publications

Numerical Modelling of a Mussel Line System by Means of Lumped-Mass Approach

Numerical Modelling of a Mussel Line System by Means of Lumped-Mass Approach

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

Deadweight anchoring behavior for aquaculture longline

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