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首页> 外文期刊>Magazine of Concrete Research >3D random packing algorithm of ellipsoidal particles based on the Monte Carlo method
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3D random packing algorithm of ellipsoidal particles based on the Monte Carlo method

机译：基于蒙特卡罗法的​​椭圆形粒子3D随机包装算法

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摘要

The random packing of aggregate particles is an important factor affecting the mechanical properties of concrete at the mesoscopic scale. In the current study, a meso-mechanical pretreatment algorithm is developed to construct the random ellipsoidal aggregate model for the mesoscopic structure of fully graded concrete. The Fuller curve combined with equivalent diameter is adopted to ensure equality between the gradation and content of the random ellipsoidal aggregates and those of the actual geometric aggregates. A 'removing occupied space' method is proposed to improve the packing efficiency based on the background grids strategy. A modified search algorithm consisting of rough and fine detection for determining the overlaps is proposed to improve the optimised simulation of the meso-structure of cement-based composites. A random ellipsoidal aggregate model with different aspect ratios of ellipsoid is developed and compared with the existing algorithms to test the efficiency of the new pretreatment algorithm. The effect of the ellipsoidal shape on the random packing fraction is investigated based on the proposed pretreatment algorithm. The pretreatment algorithm proposed greatly improves the efficiency of packing and provides a powerful tool for the realisation of three-dimensional large-scale numerical meso-concrete.
机译：骨料颗粒的随机包装是影响介于介质规模的混凝土机械性能的重要因素。在目前的研究中，开发了一种中间机械预处理算法以构建完全分级混凝土的介观结构的随机椭圆形聚集模型。采用富勒曲线与等效直径相结合，以确保随机椭圆形聚集体的渐变和含量与实际几何聚集体的含量之间的平等。提出了“去除占用空间”方法，以提高基于背景网格策略的包装效率。提出了一种由用于确定重叠的粗糙和精细检测组成的修改的搜索算法，以改善基于水泥基复合材料的中间结构的优化模拟。开发并与现有算法进行了不同纵横比的随机椭圆形骨料模型，并与现有算法进行比较，以测试新的预处理算法的效率。基于所提出的预处理算法研究了椭圆形形状对随机包装级分的影响。预处理算法提出了大大提高了包装的效率，并为实现三维大规模数值中间混凝土提供了强大的工具。

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  • 来源
    《Magazine of Concrete Research》 |2021年第8期|343-355|共13页
  • 作者

    Chen Changhong; Bai Songlin; Huang Ying; Lam Lik; Yao Yao; Keer Leon M.;

  • 作者单位

    Northwestern Polytech Univ Sch Mech & Civil Engn Xian Peoples R China;

    Northwestern Polytech Univ Sch Mech & Civil Engn Xian Peoples R China;

    Xian Univ Architecture & Technol Sch Civil Engn Xian Peoples R China;

    Southern Univ Sci & Technol Dept Ocean Sci & Engn Shenzhen Peoples R China;

    Xian Univ Architecture & Technol Sch Civil Engn Xian Peoples R China;

    Northwestern Univ Civil & Environm Engn Evanston IL USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    aggregates; composite materials; finite element methods;

    机译：骨料;复合材料;有限元方法;

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