A calibration method of discrete element contact model parameters for bulk materials based on experimental design method

被引:19
作者
Bu, Peng [1 ]
Li, Yanlong [1 ]
Zhang, Xin [2 ]
Wen, Lifeng [1 ]
Qiu, Wen [1 ]
机构
[1] Xian Univ Technol, State Key Lab Ecohydraul Northwest Arid Reg, Xian 710048, Shannxi, Peoples R China
[2] Hanjiang to Weihe River Valley Water Divers Projec, Xian 710100, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Rockfill; Experimental design method; Discrete element method; Parameter calibration; Triaxial test; Multi -objective optimization; PARTICLE BREAKAGE; NUMERICAL-SIMULATION; BEHAVIOR; DEM;
D O I
10.1016/j.powtec.2023.118596
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This study proposes a method to address the issues of large amount of calculation and low efficiency in the calibration of discrete element method (DEM) contact model parameters for rockfill, which is based on the experimental design method. Plackett-Burman design method was used to analyze the significance of each contact model parameter to the macro-mechanical parameters. Second-order response surface regression models were developed to analyze the relationship between macro-mechanical parameters and contact model param-eters that have significant impact on them. The contact model parameters in the rockfill DEM were calibrated using a multi-objective optimization method based on laboratory triaxial tests. The calibrated parameters were then used to simulate discrete element triaxial tests of the rockfill under varying pressure conditions. The study demonstrates that calibrated parameters can accurately predict the macroscopic behavior of rockfill under different confining pressures. Additionally, the calibration method has good applicability and effectiveness.
引用
收藏
页数:14
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