Numerical investigation on dynamic response of the screen mesh in vibrating screening through DEM-FEM co-simulation

Abstract

Dynamic response of the screen mesh is of great significance in the optimum vibrating screen design. In this paper, based on the DEM-FEM co-simulation method, the effect of screening parameters on the dynamic response of the screen mesh is explored and the mechanism is revealed on the particle level. Firstly, a virtual experiment on a linear vibrating screen was carried out to analyze the screening parameters’ effect with both impact load and sustained stress inflicted on the screen mesh. Then, the time-domain evolution regularity of the screen mesh LVA (Local Vibration Amplitude) under different particle plugging conditions was investigated based on the co-simulation. Finally, the influence of screening parameters on LVA and its distribution was discussed. The results show that the screening parameters can greatly affect the screen mesh LVA and its distribution by changing the movement of the granular material and the particle penetration probability, which provides an important basis for the optimal design of the screen mesh and its supporting structure.