基于AUTOCAD的混凝土骨料建模分析

Modelling analysis of the concrete aggregate based on AUTOCAD

为深入研究混凝土细观结构,利用AUTOCAD内置的VBA语言自动生成混凝土二维椭圆、多边形以及三维椭球、多面体骨料模型,并可以用其进行有限元分析。利用VBA中的IntersectWith命令,提出了一种新的、更为简单的、适用于所有形状的骨料干涉判断方法——交点法。模拟结果表明:利用AUTOCAD建立混凝土骨料模型,程序通俗易懂、方法简单,模型直观且精确性高。通过AUTOCAD与其它软件之间进行CAD数据交换的交互文件SAT,可导入多种有限元软件进行分析,有利于对混凝土的宏观、细观力学性质做进一步的数值研究。

In order to study the meso-structure of concrete,models of two-dimensional ellipse,polygon and three-dimensional ellipsoid,polyhedron concrete aggregate were developed through the VBA language in AUTOCAD for finite element analysis. A new method,namely crossing method,which was much simpler and can be used in modelling analysis for aggregate with any shape,was presented by the IntersectWith command in VBA. The simulation results show that concrete aggregate model established by AUTOCAD is easy to understand,simple in method,intuitive and accurate. And through the interactive data file SAT of AUTOCAD can exchange CAD data with other software,a variety of finite element software can be conducted for analysis and research on macro and micro mechanical properties of concrete.