Method for creating three-dimensional finite element mesh

Abstract

The invention belongs to fields of computer image processing; a method of generating three-dimensional finite element grid is disclosed that includes steps as following: 101. Two-dimension surface grid is divided on surface of the three-dimensional model of object noumenon; 102. The noumenon basic grid which encompasses the three-dimensional model is generated by the noumenon basic grid built by projection borderline; 103. The Two-dimension surface grid is inserted into the back of the noumenon basic grid, eliminating the noumenon grid which is out of the noumenon surface grid; the noumenon three-dimensional grid needed is obtained. Because said technical project is adopted, the Two-dimension surface grid and the noumenon basic grid are obtained easily, for adopting the penetration algorithm, the time of generating final noumenon grid is decreased than traditional approach, quantity of work in several months can be accomplished within several days even several hours. At the same time, because the three-dimensional noumenon grid generated is hexahedron grid, the quantity of grid id higher, the calculation error can be improved greatly.

Description

[Technical Field] [0001] The present invention relates to computer image processing technology, in particular to a method for generating three-dimensional finite element meshes. [Background technique] [0002] In the production of various manufacturing industries, such as the design and manufacturing process of automobile products, it is necessary to carry out force and deformation analysis, fluid fluidity analysis, or electromagnetic field analysis of structural components to achieve the purpose of saving design costs and shortening the product launch cycle. . A three-dimensional model of the product is usually established in a computer as the basis for analysis. The current Pro-Engineer, CATIA, and Patran can be used as 3D modeling tools, and CAD (Computer Aided Drafting) is usually used as a basic finite element analysis tool. [0003] As the initial process of the 3D finite element method, a structure or mechanical part to be analyzed is first divided into small units of a ce...

AI Technical Summary

Problems solved by technology

From a literal point of view, it can be realized that the process of manually dividing the hexahedral mesh is very complicated. Usually, it will take a long time for a shape with a moderate difficulty to perform hexahedral meshing, usually several months.

Because 3D grid modeling takes a lot of time, it creates a bottleneck for subsequent analysis and design, which is a basic problem in the field of engineering design.

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