HAN Wei, WANG Shaozong, ZHANG Qian, TIAN Yuhang

(State Key Laboratory of Advanced Forming Technology and Equipment，China Academy of Machinery Science and Technology, Beijing 100044, China)

Abstract: In order to verify the feasibility of the discrete element method to calibrate the discrete element simulation parameters of micron sized particles, a powder reactive dye with particle size distribution of 10～400 μm in the printing and dyeing industry was selected as the representative to carry out the parameter calibration test. Performing digital image processing on the pile image in the test of measuring the accumulation angle of the dye, calculateing its accumulation angle and use this as the response value, selecting “Hertz-Mindlin with JKR” as a contact model, the Plackett-Burman test was performed to find the three most significant factors affecting the flow characteristics of the dye. Two steepest ascent tests were carried out to determine the optimal value range of each factor. Then, according to box Behnken test, the second-order regression model of accumulation angle and saliency parameters was established and optimized, and the best combination of saliency parameters was calculated. Finally, the simulation parameters were used to carry out the verification test, and the results were compared with the measured values of physical experiments. The reults show that relative error of the verification test is 1.19%, which proves that the parameter calibration test is feasible.

Keywords: micron sized particles; powder reactive dyes;parameter calibration; discrete element simulation; accumulation angle; second-order regression mode

中图分类号：TS190

文献标志码：A

文章编号：1008-5548(2021)06-0060-10

DOI:10.13732/j.issn.1008-5548.2021.06.007

收稿日期： 2021-06-24，修回日期：2021-09-13，在线出版时间：2021-10-26 14:35。

基金项目：国家重点研发计划项目，编号：2016YFC0700905-04。

第一作者简介：韩伟(1994—)，男，汉族，硕士研究生，研究方向为先进制造技术及装备。E-mail: 122352877@qq.com。

通信作者简介：王绍宗(1981—)，男，汉族，博士，研究员，硕士生导师，研究方向为数字化制造。E-mail: wszbit@163.com。