混凝土二维骨料随机生成与投放程序开发

Program for generation and distribution of two-dimensional random aggregate of concrete

提出运用搜索算法实现椭圆骨料干涉判断的方法和基于圆形或椭圆形骨料随机取点生成凸多边形骨料的方法,进而得到圆形、椭圆形和凸多边形3种不同形状的混凝土二维骨料随机生成与投放算法;然后通过MATLAB自编程序进行3种不同形状、不同级配的二维骨料投放对比,算例表明利用本程序二级配骨料投放可以达到56.3%,三级配骨料投放可以达到64.1%;最后基于MATLAB开发骨料随机生成与投放的可视化界面程序,并进行骨料模型有限元网格剖分.结果表明该算法简单有效,可视化界面简洁直观,所生成的数据结果文件可直接导入大型通用有限元软件,为混凝土细观力学性能研究提供数值模型基础.

The method of judging elliptical aggregate interference by using search algorithm and the method of generating convex polygon aggregate based on random points of circular or elliptical aggregate is proposed.Then the random generation and distribution algorithm of concrete two-dimensional aggregate with three different shapes(circular,elliptic and convex polygon)is obtained.And then three dimensional aggregate distribution with different shapes and gradations through MATLAB is compared.The example shows that the application of this program can reach 56.3%for the second graded aggregate and 64.1%for the third graded aggregate.Finally,based on MATLAB visualization interface technology,two-dimensional aggregate random generation and distribution process is developed.The results show that the algorithm is simple and effective,and the visual interface is simple and intuitive.The generated data result file can be directly imported into finite element method software,which provides a numerical model basis for the study of the meso-mechanical properties of concrete.