Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (9): 1264-1268.DOI: 10.12068/j.issn.1005-3026.2016.09.011

• Mechanical Engineering • Previous Articles     Next Articles

BPM Mechanical Parameters Based on Discrete Element Method and Full Factorial Experiment Design

LI Qiang1, GONG Ya-dong1, SONG Wei-gang1, JI Zhao2   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. School of Mechanical Science and Engineering, Jilin University, Changchun 130025, China.
  • Received:2015-05-29 Revised:2015-05-29 Online:2016-09-15 Published:2016-09-18
  • Contact: LI Qiang
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Abstract: In order to investigate the relationship between microscopic and macroscopic mechanical properties of rock, and to improve the efficiency of rock breakage simulation in EDEM (extended discrete element method ), samples for breakage simulation were prepared. Based on the breakage principle, EDEM was used to simulate rock uniaxial compression test. The influence of friction coefficient, shear modulus, micro particle number, parallel bond strength and stiffness on compressive strength and macro stiffness was analyzed. The key and interaction effects were obtained by the full factorial experiment. Regression analysis method was used to predict BPM macroscopic mechanical parameters and to analyze the variance, goodness of fit and residuals. The results show that the error rate of prediction model is less than 10%.

Key words: discrete element method(DEM), full factorial experiment, BPM(bonded particle model), regression analysis, breakage principle

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