基于DEM模拟的筒仓卸料过程瞬时拱影响因素分析OA北大核心CSTPCD
Analysis of influence factors of instantaneous arch during silo discharging process based on DEM simulation
为探究大豆在筒仓卸料过程的瞬时拱形成条件及各因素的影响规律,阐明大豆在筒仓内的流变特性,采用离散元方法(DEM),以大豆在筒仓内的卸料过程为对象,通过改变筒仓的半锥角、开口直径、颗粒间摩擦系数、物料密实度等参数,分别进行模拟仿真.结果表明,半锥角为30°,35°,45°时,最大压力值分别为2390.76,2289.53,2540.9 Pa;开口直径为50,60,70 mm时,卸料时间分别为103,62,40 s;摩擦系数设置为0.6,0.7,0.8时,卸料时间分别为61.9,64.9,67.2 s;密实度设置为500,750,1000 mm时,最大质量流量分别为0.44,0.50,0.67 kg/s.研究为更精确地寻求其他散料食品在筒仓卸料过程的流变特性提供参考.
To explore the instantaneous arch formation condition of soybeans during the unloading process of silos and the influence rules of various factors on it,and to clarify the rheological characteristics of soybeans in silos,the discrete element method(DEM) was used,and the unloading process of soybeans in the silo was taken as the object to conduct simulations respectively by changing the semi cone angle,opening diameter,inter particle friction coefficient,material density and other parameters of the silo.The results show that when the half cone angles are 30°,35°,and 45°,the maximum pressure values are 2390.76,2289.53,2540.9 Pa,respectively;When the opening diameters are 50,60,70 mm,the unloading time are 103,62,40 s,respectively;When the friction coefficient is set to 0.6,0.7,0.8,the unloading time is 61.9,64.9,67.2s,respectively;When the density is set to 500,750,1000 mm,the maximum mass flow rates are 0.44,0.50,0.67 kg/s,respectively.The study provides a reference for seeking more accurate rheological properties of other bulk foods during the unloading process of silos.
韦熙;周甲伟;徐耀杰
华北水利水电大学机械学院,郑州 450045
机械工程
离散元方法筒仓卸料瞬时拱影响因素
discrete element method(DEM)silounloadinginstantaneous archinfluence factor
《包装与食品机械》 2024 (004)
56-66 / 11
国家自然科学基金项目(52275110);河南省科技攻关项目(232102220086);河南省高校科技创新人才计划项目(24HASTIT044)
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