Dynamic characteristics of two-way coupling between flip-flow screen and particles based on DEM

被引：0
|
作者：
Zhang X. [1 ]
Wu B. [1 ,2 ]
Niu L. [1 ,2 ]
Xiong X. [1 ,2 ]
Dong Z. [1 ]
机构：
[1] College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan
[2] Key Laboratory of Advanced Transducers and Intelligent Control Systems of Ministry of Education, Taiyuan University of Technology, Taiyuan
来源：
Meitan Xuebao/Journal of the China Coal Society | 2019年 / 44卷 / 06期
关键词：
Approximate flexibility; Dynamic characteristics; Flip-flow screen; Screening efficiency; Two-way coupling;
D O I：
10.13225/j.cnki.jccs.2018.1175
中图分类号：
学科分类号：
摘要：
Two-way coupling between screen surfaces and particles can provide more actual reference to the system dynamic analysis of screening machine.However, the algorithm of flexibility is so complex that the part of contact of both cannot be calculated due to the disability of interface does not support the import of flexible models when performing co-simulation among EDEM and RecurDyn.Aiming at the problems proposed currently, the method of piecewise linear interpolation will be adopted to verify the equivalence of similar panels and flexible panels.Bending and shrunk ratio of pores have been calculated, under static and inner dead point position in the mid-point of similar panels, and compared with catenary to find relative tolerance, identifying the feasibility of equivalent method.The influence of eccentric mass, dip angles and size composition on screening efficiency, production ratio and vibrating velocity have been studied.The results indicate that screening efficiency will increase as each of three parameters decreased nonlinearly.Production ratio will decrease disproportionally with the increment of eccentric mass, which will reach minimum under 25% of hard-screening, but the relationships with dip angles and size composition is opposite.Additionally, the eccentric mass is set as for optimum between screening efficiency and production ratio.The content of size composition has a less effect on particles velocities, while the increases of eccentric mass and dip angles lead to the increment of particles velocities gradually.This paper provides a research thought for further revelation of motion rules of moist fine coals and for dynamic analysis of flip-flow screen surfaces. © 2019, Editorial Office of Journal of China Coal Society. All right reserved.
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页码：1930 / 1940
页数：10
相关论文
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