The method of generating hollow model based on solid model of finite element mesh

Abstract

The invention provides a finite element mesh-based method for generating a hollow model by an entity model. The method comprises the steps of dividing the entity model into finite element meshes; generating spherical surfaces by taking nodes of the finite element meshes as spherical centers; performing triangular mesh division on the spherical surfaces; for finite element body units, marking crossed points, on the two spherical surfaces, of node connection lines formed between the nodes which the spherical surfaces belong to and the adjacent nodes for the spherical surfaces, determining two corresponding triangular meshes through the two marked crossed points, connecting vertexes corresponding to the two triangular meshes to generate triangular prisms, connecting diagonal lines of the side surfaces of the triangular prisms, and dividing the triangular prisms into the two triangular meshes, thereby finishing the processing of all the finite element body units; and removing finite element mesh regions outside all the triangular meshes to obtain the spatially hollow model corresponding to the entity model and having the surface and interior of hollow structures. The generation method is simple in operation and high in feasibility.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to a method for generating a hollow model based on a solid model of a finite element grid. Background technique [0002] The hollow model can save materials and cost, and has the characteristics of transparent structure and beautiful style. It is widely used in industrial products, architecture, art and other fields. With the emergence of additive manufacturing (3D printing technology), it is possible to manufacture parts with complex structures. The existing method can generate a hollow structure on the surface of the solid model, but the internal cavity cannot generate an internal hollow structure, so it cannot Generate a space hollow model in which both the surface and the interior of the solid model are hollow structures. With the further development of additive manufacturing (3D printing) technology, the solid model is developing into a hollow model, which has the advanta...

AI Technical Summary

Problems solved by technology

With the emergence of additive manufacturing (3D printing technology), it is possible to manufacture parts with complex structures. The existing method can generate a hollow structure on the surface of the solid model, but the internal cavity cannot generate an internal hollow structure, so it cannot Generate a hollowed-out model in which both the surface and the interior of the solid model are hollowed out

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