| 离散元法中三种球形颗粒接触发现算法的比较 |
| |
| 引用本文： | 刘红,刘军.离散元法中三种球形颗粒接触发现算法的比较[J].黑龙江科技学院学报,2006,16(6):360-363. |
| |
| 作者姓名： | 刘红 刘军 |
| |
| 作者单位： | 1. 华中科技大学,计算机科学与技术学院,武汉,430074
2. 河海大学,岩土工程研究所,南京,210098 |
| |
| 摘 要： | 离散元法的计算效率是离散元法的核心问题,而接触发现算法是影响计算效率的重要因素.以目前广为使用的球形颗粒离散元法中的三种接触发现算法为基础,分别将这三种方法并入到作者自行开发的离散元程序中,模拟五个不同颗粒数量的砂堆形成过程.模拟结果表明,边界盒法计算效率最高,相邻单元法次之,边界球法计算效率最低.
|
| 关 键 词： | 离散元 接触发现算法 边界球法 相邻单元法 边界盒法 |
| 文章编号： | 1671-0018（2006）06-0360-04 |
| 收稿时间： | 2006-09-13 |
| 修稿时间： | 2006-09-13 |
Arithmetic compare of three contact detection methods for spherical particles in DEM |
| |
| LIU Hong,LIU Jun.Arithmetic compare of three contact detection methods for spherical particles in DEM[J].Journal of Heilongjiang Institute of Science and Technology,2006,16(6):360-363. |
| |
| Authors: | LIU Hong LIU Jun |
| |
| Institution: | 1. College of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Geotechnical Research Institute, Hohai University. Nanjing 210098. China |
| |
| Abstract: | The Discrete Element Method(DEM) has been widely used in simulation on mechanical behaviors of granular materials.The numerical efficient is one of key problems for simulating a large number of particles.The contact detection method is the most important factor influencing on numerical efficient for DEM.Three contact detection methods widely accepted for DEM have been introduced in this paper,and three methods have been embedded into the DEM code developed by author.Five sandpile formations with different particles numbers have been simulated using three different contact detection algorithms in DEM code.The results show that the bounding box algorithm is highly effective,bounding sphere algorithm is inefficient,and the linked cell algorithm is secondary efficiency among three contact detection methods. |
| |
| Keywords: | DEM contact detection algorithm bounding sphere algorithm linked cell algorithm bounding box algorithm |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
