摘要：针对筒仓卸料时侧压增大对仓壁变形的影响,运用离散元法模拟煤炭颗粒在筒仓中的静储和卸料过程,导出的离散元仿真数据结合筒仓模型进行有限元分析;根据离散元分析可以得出卸料时筒仓侧压及增压比的变化规律,从有限元计算结果得到卸料时径向变形及位移比的分布。结果表明:卸料时增压比与径向位移比变化基本一致,增压比与料仓内颗粒流动速度存在一定的线性关系;静、动态时侧压峰值出现在直筒壁与漏斗壁过渡处靠近直筒壁一侧,侧压增压比在筒仓中上部达到最大值,必须强化过渡处和筒仓上部的结构设计。

关键词：筒仓卸料；超压；变形；有限元法；离散元法

Abstract： To acquire the influence of overcharge lateral pressure on radial deformation in silo， the discrete element method was used to stimulate the stewing and discharging of coal particles in silo. Exported data from the discrete element method simulation was loaded on the silo model to complete finite element analysis. Variation regularity of the lateral pressure and ratio during discharging were obtained by the discrete element method. Distribution of radial deformation and ratio in discharging was obtained by the finite element analysis. The results show that the tendency of radial deformation ratio is similarly identified with the lateral pressure ratio in discharging. There is a linear relation between the lateral pressure ratio and velocity of coal particles. A peak value of the lateral pressure in static and dynamic is located near straight side at transition section of the straight and the funnel. The lateral pressure ratio reaches the peak in the upper of silo. Effective measures must be taken to strengthen structure of the transition and upper of the silo. 

Keywords: discharging in silo； overpressure； deformation； finite element method； discrete element method