A dictionary can contain modeling errors such as unintended overlaps or an unintended loss of connectivity between elements. A geometry is described by a dictionary of elements and it contains points, rods, plates, and openings. The algorithm consists of two parts, the automatic geometry refinement and the preconditioned Delaunay frontal quad dominant mesh generator. It starts from a description of a geometry and produces a class conforming surface mesh as a result. Our algorithm is implemented as an end-to-end solution. We present an algorithm for the fully automatic generation of a class-compliant mesh for ship structural analysis. In addition, the influence of the order in which the plates are meshed will be explored as a preconditioning step.
We present a heuristic method to precondition the cross field of the fronatal quadrilateral mesher.
#Gmsh blossom generator
The corrected geometry is then meshed by the frontal Delaunay mesh generator as implemented in the gmsh package. The first part of the proposed method consists of an algorithm to automatically clean the geometry. The geometry is described by a dictionary containing points, rods, surfaces, and openings. The meshing algorithm will be generating quadrilateral dominated meshes (consisting of quads and triangles) and the mesh quality requirements mandate that quadrilaterals with internal angles close to 90° are to be preferred. The quality requirements on the mesh generator are imposed by the acceptance criteria of the classification societies as well as the need to avoid shear locking when using low degree shell elements.
This paper presents an algorithm for the fully automatic mesh generation for the finite element analysis of ships and offshore structures.
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