三维有限元网格自动剖分的断面节点控制法

 针对计算对象为复杂地层和有大型地下洞室群时, 自动形成三维有限元计算网格较为困难的情况,提出了三维网格自动剖分的"断面节点 控制法"。该法以地质勘探剖面图作为主控制断面,并在主控制断面上完成少量的前期数据 准备,通过不同的合并、连接和插值,在全计算域上一次形成计算空间网格。多个工程计算 实例表明,该法运用简单、适应性强、效率较高。

Method of section-node control for mesh auto-generation in 3-D FEM analysis

In the paper,the method of section node control is first proposed to solve the problem of 3 D mesh auto generation in FEM analysis when geological strata are complicate and large scale underground grottos are excavated.The geological exploratory sections are used as chief control sections,in which a small amount of data preparation is needed.The 3 D mesh is generated in the whole calculating region by means of different mergences,linkages and interpolations.Several engineering calculation illustrations show that this method is simple,more applicable and efficient.