基于离散元的粉料振动密堆积影响因素研究  

Research on the Influencing Factors of Granules Close-Packed Layer after Vibration Based on Discrete Element of Powder

作　　者：王文涛[1] 王俊元[1] 段能全[1] 杜文华[1] 

机构地区：[1]中北大学机械制造及自动化学院,太原030051

出　　处：《中国陶瓷》2013年第8期42-45,共4页China Ceramics

摘　　要：针对粉料复杂的堆积密实作用机理,建立了修正的离散元软球模型,采用正交法试验研究了碱性耐火粉料布料过程中在重力场和外力扰动下粉料内部堆积密实度随时间、振幅、频率、级配的变化情况。结果表明,合理的振动工艺能够提高粉料的堆积密度,水平振动较竖直振动能够获得更好的密度均匀性;在其他工艺参数一致的情况下,均存在最佳的振动时间、振幅、频率、级配区间来达到最好的堆积密度,这些为研究粉料堆积和压制致密化过程提供了理论参考依据。For powder complex macroscopic mechanism, building modified discrete soft sphere model to adopting orthogonal test to study the changes of internal density of basic refractory powder in the gravity field and external disturbances with time, amplitude, frequency, gradation. The results show that reasonable vibration parameters can improve the bulk density of the particles and density uniformity .The horizontal vibration can be obtained compared with the vertical vibration better density uniformity. In the case of the same other process parameters, there are the best vibration time, amplitude, amplitude, gradation interval to achieve better bulk density the same time. This work can lay theory foundation for the study of the powder densification process.

关 键 词：紧密堆积 孔隙率 离散单元法 粉料 PFC2D 

分 类 号：TQ174.612[化学工程—陶瓷工业]