出口振动筒仓颗粒流动过程的离散元分析OA北大核心CSTPCD

The particle flow W of granular materials in silos is restricted by the outlet size D.When the outlet size is small,the particle flow is prone to clogging.It is of great significance to study the method of unplugging for particle transport and dredging.In this paper,a quasi-two-dimensional silo with horizontal simple harmonic vibration at the outlet is constructed using the discrete element method,and the effects of the outlet vibration amplitude A,frequency f,and the outlet vibration velocity V and vibration acceleration Γ determined by these two parameters on the changes of spherical particle flow and particle flow rates in the silo are discussed in detail.The results show that the trend of particle flow with outlet vibration intensity is related to the silo outlet size,when D＜5,W increases with the increase of vibration acceleration Γ or vibration velocity V,and W is a function about vibration velocity V;when D＞5,W decreases with the increase of vibration acceleration Γ or vibration velocity V.The amplitude and frequency affect the particle flow rate by changing the particle longitudinal flow range and flow velocity fluctuation frequency,so that W is no longer a function of vibration velocity V.