TY - EJOU
AU - Chen, Rui
AU - Wang, Yong
AU - Peng, Ruitao
AU - Jiang, Shengqiang
AU - Hu, Congfang
AU - Zhao, Ziheng
TI - Identification of the Discrete Element Model Parameters for Rock-Like Brittle Materials
T2 - Computer Modeling in Engineering \& Sciences
PY - 2020
VL - 123
IS - 2
SN - 1526-1506
AB - An inverse method for parameters identification of discrete element model
combined with experiment is proposed. The inverse problem of parameter identification
is transmitted to solve an optimization problem by minimizing the distance between the
numerical calculations and experiment responses. In this method, the discrete element
method is employed as numerical calculator for the forward problem. Then, the orthogonal
experiment design with range analysis was used to carry out parameters sensitivity
analysis. In addition, to improve the computational efficiency, the approximate model
technique is used to replace the actual computational model. The intergeneration projection
genetic algorithm (IP-GA) is employed as the optimization algorithm. Consequently, the
parameters of the discrete element model are determined. To verify the effectiveness and
accuracy of the inverse results, the comparisons of shape deviation experiments with
discrete element simulations are provided. It indicates that the effective and reliable
discrete element model parameters can be quickly obtained through several sets of
experimental data. Hence, this inverse method can be applied more widely to determine
the parameters of discrete element model for other materials.
KW - Discrete element model
KW - parameter determination
KW - rock-like materials
KW - IP-GA
KW - inverse method
DO - 10.32604/cmes.2020.07438