地下工程中三维组合单元的智能预处理技术

3D Combination Element Intelligent Preprocessing Technology in Underground Engineering

传统数值分析方法难以实现大量不规则交错结构面的几何产状和分布特征等的三维仿真。为此,提出一种基于三维组合单元的全自动智能预处理方法,将结构面穿过的单元作为组合单元进行预处理,无需单独划分模拟结构面的特殊单元,从而简化前处理建模工作。编制智能预处理程序,以自动实现对组合单元、结构面影响带单元的智能识别与判定等功能,并获取组合单元中各组成部分的详细信息。实例应用结果表明,该方法可提高有限元建模仿真的工作效率。

In traditional numerical analysis methods, the 3D simulation of multitudinous cross structural planes＇s occurrence and distribution is difficult, so a intelligent preprocessing method based on 3D combination element is proposed. The elements crossed by structui＇al planes are pretreated as combination elements without dividing special elements, that simplifies the pretreatment work. The intelligent preprocessor is developed, which can auto-recognize the combination elements and structural plane influence zone elements, and obtain the detail information of each component. An underground engineering case show that it can improve the efficiency of Finite Element Method（FEM） simulation.