东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (11): 1631-1634.DOI: -

• 论著 • 上一篇    下一篇

散状物料转载冲击载荷的DEM仿真

宋伟刚;陈洪亮;李勤良;杨彦贺;   

  1. 东北大学机械工程与自动化学院;中国煤炭科工集团沈阳设计研究院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50775031)

Simulation of handling impact load of bulk material by DEM method

Song, Wei-Gang (1); Chen, Hong-Liang (2); Li, Qin-Liang (1); Yang, Yan-He (1)   

  1. (1) School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China; (2) Shenyang Design and Research Institute, China Coal International Engineering Group, Shenyang 110015, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Song, W.-G.
  • About author:-
  • Supported by:
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摘要： 依据离散单元方法,应用DEM仿真软件对转载过程进行计算机仿真.针对当前采用DEM方法尚不能做到微小颗粒的计算,通过对颗粒粒度为75,100,150 mm的对比计算,得出颗粒粒度在50~300 mm范围内与实际运行条件比较接近.提出了采用冲击系数来表征冲击的大小,该参数可以在不同的落料高度、颗粒大小等差异情况下对冲击效应进行比较,通过计算机仿真得出了单个颗粒和颗粒流的最大冲击力和冲击系数,较好地反映了颗粒流冲击的效应.根据颗粒作用在输送带上的法向力趋于物料重力的结果,验证了计算结果的正确性.

关键词: 带式输送机, 散状物料, 转载, DEM, 冲击系数

Abstract: Based on discrete element method (DEM), the DEM software was used to simulate the bulk material handling process. Considering the current DEM method cannot be applied to calculating the motion of tiny particles, the particles were comparatively simulated with sizes of 75, 100 and 150 mm and it was found that the results were close to the actual operating conditions for particles with sizes of 50~300 mm. The impact coefficient was proposed to characterize the impact influence, which can be used to compare the impact effect in different cases of blanking height and particle size. The maximum impact force and coefficient of single particle and particle flow can be obtained by computer simulation, which reflect the impact effect of particle flow very well. The fact that the normal force of particles acting on the conveyor belt approximates to the gravity of bulk material confirms the accuracy of the calculation results.

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