基于几何造型的有限元前处理技术

The Finite Element Preprocessing Technique Based on Geometrical Modelling

本文在综述了有限元网格生成技术的基础上,着重介绍一个基于几何造型系统的有限元分析的前处理系统。这个系统作为几何造型系统与有限元分析程序之间的接口,主要功能是对几何造型系统的二维任意形体进行有限元网格的划分,并能够进行局部加密,自动节点编号,交互划分定义单元组,定义单元节点信息、载荷信息、边界条件等,最终生成有限元分析程序所需的输入文件。同时,还能够处理平移扫描体和旋转扫描体等二维半形体。本文主要算法可以推广到三维形体的网格生成,实现对更广泛的三维结构的有限元网格生成。

A preprocessing system of finite element analysis based on geometrical modelling is introduced in this paper. As an interface between geometrical modelling system and finite element analysis program, this system can generate the finite element mesh from 2D object produced by GM system, densify local finite element mesh, number mesh nodes automatically, and so on, The output data file can be used by FEM program directly, The key algorithm in this paper can be extended to 3D space.