摘要
为了研究颗粒物料在中心口圆锥底料罐中的卸料特性,采用离散单元法建立颗粒力学模型,在EDEMTM软件平台上构建半罐模型进行仿真分析,并通过实验来检测其精度。在此基础上进行整罐卸料仿真,研究料罐半锥角、颗粒形状和材质等因素对卸料过程的影响。结果表明,所建的离散单元力学模型和仿真模型比较准确地描述了颗粒卸料过程;随着料罐半锥角的减小,颗粒间的挤压力逐渐增大,颗粒轴向速率逐渐加快,相应缩短了卸料时间;球形颗粒密度越大时,颗粒间挤压力越大,卸料速率也越高;与球形颗粒相比,立方体颗粒间的挤压力更大,其在卸料口处的轴向速率相对较慢,所需卸料时间更多。
In order to study the discharge properties of granular materials from concentric cone-bottom silo,this paper built the particle mechanical model based on discrete element method and semi-silo simulation model using EDEMTMsoftware,and the model＇s accuracy was tested by physical experiments.Then the whole-silo discharge simulation was carried out to analyze the effects of half cone angle of the silo,shape and material of particles on the granular flow.The results show that the constructed model describes the discharge process precisely.With the decrease of half cone angle of the silo,the extrusion force and axial velocity of particles increase,resulting in shorter unloading time.The denser the spherical particles are,the greater extrusion force and faster discharge rate they will get.Compared with spherical particles,cubic particles bear larger extrusion force and have slower axial velocity at the hopper outlet,so their discharge process lasts longer.
作者
郭健玮
孔建益
王兴东
盛汉桥
Guo Jianwei1, Kong Jianyi1, Wang Xingdong1, Sheng Hanqiao2(1.Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education,Wuhan University of Science and Technology, Wuhan 430081, China;2.WISDRI Engineering and Research Incorporation Limited, Wuhan 430223, Chin)
出处
《武汉科技大学学报》
CAS
北大核心
2018年第3期206-211,共6页
Journal of Wuhan University of Science and Technology
基金
国家自然科学基金资助项目(51475340)
关键词
颗粒材料
离散单元法
料罐
半锥角
挤压力
卸料速率
仿真
granular material
discrete element method
silo
half cone angle
extrusion force
discharge velocity
simulation
