离散元模拟技术在带式输送机中的应用

根据离散元法理论及带式输送机转弯处物料的状态,建立了带式输送机转弯段的离散元模型。模型中利用非线性Hertz Mindlin接触模型,块状颗粒采用4个基本球单元组合形式,模拟了不同带速时的料流运动,测试了4种带速下的输送带外侧、带中央所受的平均压力和最大压力;2组不同颗粒、4种不同滚动摩擦因数下的颗粒平均速度;匀加速旋转时的料流运动情况。结果表明,颗粒平均速度与计算的带速完全相符,而颗粒平均速度与颗粒单元、滚动摩擦因数无关;匀加速旋转模拟时,随着速度的增加物料逐步向外滚翻。

Application of Discrete Element Simulation Technology to Belt Conveyor

According to the discrete element method theory and the status of the material at the turning point of the belt conveyor,a discrete element model of the belt conveyor turning section was established.A nonlinear Herts Mindlin touch model was applied to the discrete element model.There were four basic ball element combined units of the massive particles was applied to simulate the material flow movement with different belt speed and simulate and test the average pressure and max pressure at the conveying belt outside and belt center under four different belt speeds.The average speed of the particle under two group different particles and four different rolling friction factors was simulated and test and the material flow movement with constant speeding rotary was simulated and test.The results showed that the average speed of the particles and the calculated belt speed could be fully met each other and the average speed of the particle would have no relationship to the particle element and rolling friction factor.At the constant speeding rotary simulation,the material would be steadily rolling to outside with the speed increased.