Modelling realistic shape and particle inertia in DEM
Modelling realistic shape and particle inertia in DEM
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DOI：
10.1680/geot.9.t.015
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发表时间：
2010-03-01
期刊：
影响因子：
5.8
通讯作者：
McDowell, G.
中科院分区：
文献类型：
--
作者：
Ferellec, J.;McDowell, G.
在DEM中使用重叠球体的团块可用于表示真实的颗粒形状。本技术说明讨论了一种简单快速的方法，并强调了影响颗粒分辨率的关键参数。然而，重叠质量的问题是密度不均匀，这导致不正确的惯性矩，从而导致旋转阻力。本技术说明针对这一问题，并提出了一种简单的方法来减少主惯性矩的误差。下降的一堆压舱物颗粒的效果示出，该方法不仅提高了行为，但也计算时间。
The use of clumps of overlapping spheres in DEM can be used to represent realistic particle shapes. This Technical Note discusses a method that is simple and fast, and highlights the key parameters influencing particle resolution. However, the problem with overlapping mass is that the density is non-uniform, which leads to incorrect moments of inertia and therefore rotational resistance. This Technical Note addresses this issue, and proposes a simple method to reduce the error in the principal moments of inertia. The effect on a falling heap of ballast particles is shown; the method improves not only behaviour, but also computational time.