转送站的离散元模拟研究

Research on the discrete element method simulation of transfer station

为了研究转送站料流对溜槽的作用机理,利用离散元方法对转送站物料转载过程进行了模拟研究。单元之间接触力运算采用了非线性Hertz Mindlin接触模型,颗粒单元采用基本球单元组合方式,建立了转送站三维离散元模型。针对一种溜槽结构,测试了溜槽所受的力,包括不同流量和不同的带摩擦系数时溜槽的平均压力及不同速度时的溜槽最大压力。通过模拟很好地展示了料流的宏观规律,以及各种因素对溜槽所受压力的影响,分析结论可供转送站优化设计时参考。

In order to study the principles of materials flow acting on the chute in the transfer station, the course of transshipment of materials in the transfer station is simulated by using the discrete element method. The operation of contact force of elements adopt the non-linear Hertz Mindlin contact model, and the particle model adopt the basic ball element compound mode. The three dimensions discrete element model of the transfer station is established. Aiming at a structure of the chute, all the forces of the chute suffered are tested, including the chute＇s average pressure of different flow rates and different belt friction factors and the chute＇s maximum pressure of different friction speeds. The macroscopic rule of material flow and the influence of various factors on the pressures of chute are well displayed through simulation. The analysis conclusion can provide a reference for the optimization design of the transfer station.