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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Packing spherical discrete elements for large scale simulations
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Packing spherical discrete elements for large scale simulations

机译：打包球形离散元素以进行大规模仿真

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摘要

We introduce a new geometric method to generate sphere packings with restricted overlap values. Sample generation is an important, but time-consuming, step that precedes a calculation performed with the discrete element method (DEM). At present, there does not exist any software dedicated to DEM which would be similar to the mesh software that exists for finite element methods (FEM). A practical objective of the method is to build very large sphere packings (several hundreds of thousands) in a few minutes instead of several days as the current dynamic methods do. The developed algorithm uses a new geometric procedure to position very efficiently the polydisperse spheres in a tetrahedral mesh. The algorithm, implemented into YADE-OPEN DEM (open-source software), consists in filling tetrahedral meshes with spheres. In addition to the features of the tetrahedral mesh, the input parameters are the minimum and maximum radii (or their size ratio), and the magnitude of authorized overlaps. The filling procedure is stopped when a target solid fraction or number of spheres is reached. Based on this method, an efficient tool can be designed for DEMs used by researchers and engineers. The generated packings can be isotropic and the number of contacts per sphere is very high due to its geometric procedure. In this paper, different properties of the generated packings are characterized and examples from real industrial problems are presented to show how this method can be used. The current C++ version of this packing algorithm is part of YADE-OPEN DEM [20] available on the web.
机译：我们引入了一种新的几何方法来生成具有重叠值受限的球体堆积。样品生成是重要的但很耗时的步骤，它要先经过离散元素法（DEM）进行计算。当前，不存在任何专用于DEM的软件，该软件类似于有限元方法（FEM）的网格软件。该方法的一个实际目标是在几分钟内而不是像当前的动态方法那样在几天内构建非常大的球形填充物（数十万个）。所开发的算法使用一种新的几何程序来非常有效地将多分散球体定位在四面体网格中。该算法在YADE-OPEN DEM（开源软件）中实现，包括用球体填充四面体网格。除了四面体网格的特征之外，输入参数还包括最小和最大半径（或其大小比）以及授权重叠的大小。当达到目标固体分数或球数时，停止填充过程。基于此方法，可以为研究人员和工程师使用的DEM设计一个有效的工具。产生的填充物可以是各向同性的，并且由于其几何过程，每个球体的接触数非常高。在本文中，对所产生填料的不同性质进行了表征，并通过实际工业问题的例子进行了说明，以说明如何使用该方法。该打包算法的当前C ++版本是Web上可用的YADE-OPEN DEM [20]的一部分。

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  • 作者

    Jean-Francois Jerier; Vincent Richefeu; Didier Imbault; Frederic-Victor Donze;

  • 作者单位

    Laboratoire Sols, Solides, Structures et Risques, UMR5521, Universite Joseph Fourier, INP, Grenoble Universite, Domaine Universitaire, BP 53, 38041 Grenoble Cedex 9, France;

    rnLaboratoire Sols, Solides, Structures et Risques, UMR5521, Universite Joseph Fourier, INP, Grenoble Universite, Domaine Universitaire, BP 53, 38041 Grenoble Cedex 9, France;

    rnLaboratoire Sols, Solides, Structures et Risques, UMR5521, Universite Joseph Fourier, INP, Grenoble Universite, Domaine Universitaire, BP 53, 38041 Grenoble Cedex 9, France;

    rnLaboratoire Sols, Solides, Structures et Risques, UMR5521, Universite Joseph Fourier, INP, Grenoble Universite, Domaine Universitaire, BP 53, 38041 Grenoble Cedex 9, France CSIRO Earth Science and Resource Engineering, Queensland Centre for Advanced Technologies, 1 Technology Court, Pullenvale, 4069, Australia;

  • 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

    discrete element method; sphere packing; tetrahedral mesh;

    机译：离散元法球状填料;四面体网格;

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