混凝土二维随机骨料的数值模拟

Numerical simulation of two-dimensional random aggregate in concrete

通过对现有混凝土二维随机骨料生成算法的分析总结,引入一种新的算法,编写二维骨料生成程序,对圆形、椭圆形以及基于圆和椭圆的内接凸多边形三种剖面形状的混凝土二维随机骨料进行数值模拟,并进行网格划分。提出在从圆周上取点生成的圆基凸多边形基础上,从椭圆周上取点生成椭圆基凸多边形,并且引入"交线法"(Intersect Line)对凸多边形进行干涉判断。最后通过几个算例对此方法进行验证。模拟的结果表明:此方法简单、快捷、高效,并可利用先进的有限元软件对混凝土宏、细观力学性能作进一步的数值研究。

A two-dimensional random aggregate generated program is compiled by a new kind of algorithm according to analysis of related algorithms in existence.The round shape, ellipse shape and round based/ellipse based convex polygon concrete random aggregates are numerical simulated in two dimensions and meshed.A new method is put forward which generating convex polygon aggregates by taking points in ellipse circle from round circle.＇Intersect Line＇ is brought to convex polygon aggregates interference judgment.At last, several examples are taken to verify this method.Simulated results showed that this method is simple, swift, efficient, and based on this method, it can do further research on macroscopic/mesoscopic mechanical performance in concrete by making use of advanced finite element software.