2016年3月1日 · This paper described the development of a plane strain DEM model to simulate 2D multi-trapdoor model tests, which coincide with the geometric conditions of unreinforced piled embankments. The micromechanical parameters in the DEM model are found to be crucial to correctly simulate sand behavior and reproduce the arching evolution patterns ...

This DEM code includes: Nearest-neighbor algorithm; Hertz collision model; Verlet time integration; Core routines deferred to Numba; As of today, rolling movement is not implemented

2010年4月1日 · The effects of physical properties (particle size, density and friction) on mixing behaviors were investigated by 2D DEM simulations by using two groups of parameters: one is the control group with specifications of normal values, and the other, called the test group, in which the value of only one examined parameter was exaggerated as a big ...

2D DEM: adapted from “Understanding the Discrete Element Method”, Matuttis, H., Chen, J.

<DEM2D - simulate and compare different particle models in 2D> Copyright (C) <2021> <Jonathan Jahnke> This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

SudoDEM (https://sudodem.github.io) is specifically designed for modeling non-spherical particles using discrete element method (DEM), which inherits a basic framework of an open-source DEM code, YADE (https://yade-dem.org). The project aims to develop a robust 2/3D DEM code for convex particles, e.g., polyhedrons, super-ellipsoids, poly ...

2020年4月20日 · Digital elevation models (DEMs) are data in the format of a 2D array where each cell has a corresponding elevation value. Therefore, it may sometimes prove useful to visualize these elevation models with mechanisms such as contour lines. Fortunately, this is fairly easy to accomplish in Python using packages such as GDAL and Matplotlib. Objectives

This paper reviews the research and methods of particle shapes modelling for 2D-DEM over the last three decades. This includes classification of particle shapes models in the different categories, applicable to numerous engineering disciplines that use DEM.

日常所说的dem：是指特定区域的高程数据，它是基于栅格数据结构、规则的数字高程模型，是狭义的dem（例如：帮我找个厦门区域30m分辨率的dem） 而本文说的DEM是数字高程模型：是一个更广泛的概念，它不仅可以是栅格数据，还有不规则三角网（TIN）、等高线等。

DEM内插方法很多,主要有分块内插、部分内插和单点移面内插三种。目前常用的算法是通过等高线和高程点建立不规则的三角网(TriangularIrregular Network, 简称TIN)。然后在TIN基础上通过线性和双线性内插建DEM。2. 2、 数字地形模型 DTM