By Daniel Priour
This publication absolutely describes a finite point technique for netting. That describes the relation among forces and deformation of the netting. That takes under consideration forces as a result cord elasticity, the hydrodynamic forces, the capture influence, the mesh commencing stiffness. This publication is split in five components. the 1st part comprises creation at the finite aspect approach, the second one half is set equilibrium calculation, the 3rd offers a triangular point for netting, the fourth and 5th are for cable and node point. The 6th offers few validation cases.
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Extra info for A Finite Element Method for Netting: Application to fish cages and fishing gear
5b) with smaller elements. It is clear that triangular element discretization is done very easily, unlike the numerical twines technique. This flexibility in the creation of triangular elements overcomes the cumbersome tool for creating globalized twines. This burden results from many different cases to be processed and consequently adjustments that sometimes make it impossible to fully describe the structure to be studied with the method of numerical twines. 30 4 The Triangular Finite Element for Netting 2 1 2 1 3 4 3 4 (a) (b) Fig.
This base mesh is defined as a parallelogram; its corners coincide with knots, and it includes two l twine vectors, two m twine vectors, and two n twine vectors. This base mesh is also used to quantify the number of meshes inside the triangular element. The vertices of the triangular element then have coordinates in base meshes (U1 , U2 , U3 , V1 , V2 , V3 ; Fig. 9). Vectors U and V are the sides of the mesh base. There are linear relations between these two vectors and the sides of the triangular element (arrows on Fig.
These forces are related to the number of twines through the sides of the triangle. 46 4 The Triangular Finite Element for Netting This number of twines through each side can be calculated based on the number of base mesh of each vertex. The effort on the side along U of the base mesh (Fig. 110) Here, Ti j is the effort on the side i j of the triangular element. 113) F1 , F2 , and F3 are the forces on the three vertices of the triangular element due to the tension in the twines. The contribution of the stiffness matrix is not described here.
A Finite Element Method for Netting: Application to fish cages and fishing gear by Daniel Priour