关键词: 轴对称体;有限元法;预处理

Abstract: A dispersing method for axisymmetrical structures is introduced.The high precise circular isoparametric finite element is used to disperse the structures.The method can automatically divide meshes for complex multilayer structure in a simple way,and can densify locally meshes toward single or double direction in pointed areas,what is more,can minimize the scale of stiffness metrices passing through order of elements being automatically optimized by dispersing process.It is able also to process moving boundaries and changing gaps in structures.The dispersed result can be used in the analyses of finite element directly’.Practical application showes that the dispersing method possesses advantages of rapidily and accuracy.It is applicable for the problems of planar structures too.

Key words: Axisymmetric body;Finite element method;Preprocessing