转载点物料颗粒运动的数值模拟  

Numerical Simulation of the Movement of Materiel Particles on the Transfer Station

作　　者：朴香兰[1] 郭越[1] 

机构地区：[1]延边大学工学院,吉林延吉133002

出　　处：《图学学报》2013年第3期106-110,共5页Journal of Graphics

基　　金：延边大学博士启动基金资助项目(012800-950201003)

摘　　要：为了分析转载点物料颗粒运动过程、颗粒之间、颗粒与边界之间的相互作用及运动过程中的能量变化,采用基于离散元方法的颗粒流代码(PFC3D)程序,建立了输送机头部的离散元模型,针对颗粒流的不同速度、滚筒前有无挡板,进行了物料颗粒运动的数值模拟。通过模拟发现:(1)能够很好地跟踪固体颗粒的运动过程(任意颗粒的位置、速度、平均接触力以及平均不均衡力),平均接触力的最大值随着颗粒速度的增加而增加,而平均不平衡力变化不大;(2)跟踪能量历程可以观察颗粒运动过程中各种能量的变化,其中动能的变化最为明显,且挡板设置只对动能、摩擦能与应变能有影响。To analyze the movement of materiel particles on the transfer station, the interaction between particles, interaction between particles and boundaries and the energy terms in the movement process, the procedure of particle flow code（PFC3D） based on discrete element method （DEM） is used to build the discrete element model of the transfer station. Numerical simulation of the materiel Particles is directed towards the different velocities of the particle flow and whether there is a baffle in front of the roller or not. By means of simulation, it is found to have some advantages： （1） The solid particles＇ motion can be followed better （the position, velocity, average contact force and average unbalance force of each particle）. The maximum of the average contact force increases along with the increase of particle＇ velocity, but the average unbalance force has little change; （2） Following the course of the energy, the transformation of various kinds of energies can be looked into; and in all kinds of energies, kinetic energy varies most; the baffle will carry weight to kinetic energy, friction energy and strain energy.

关 键 词：转送站 散装固体物料 离散元法 数值模拟 

分 类 号：TH122[机械工程—机械设计及理论]