关键词: 点对称结构, 半边结构, 边界条件

Abstract: The concept of point-symmetry structures is proposed in this paper.Through studying the sy mmetrical characteristic of these special structures, it is discovered that point-symmetry structures can be simplified to half-structures to make the analysis as simple as axis-symmetry structures can, but the boundary conditio ns of their half-structures are different.

Key words: point-symmetry structures, half-structures, boundary conditions