Measurement of Physical Properties of Sorghum Seeds and Calibration of Discrete Element Modeling Parameters

Guopeng Mi, Yan Liu, Tao Wang, Jianxin Dong, Shilin Zhang, Qiwei Li, Kezhou Chen and Yuxiang Huang
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Guopeng Mi: College of Mechanical and Electronic Engineering, Northwest A & F University, Xianyang 712100, China
Yan Liu: College of Mechanical and Electronic Engineering, Northwest A & F University, Xianyang 712100, China
Tao Wang: College of Mechanical and Electronic Engineering, Northwest A & F University, Xianyang 712100, China
Jianxin Dong: College of Mechanical and Electronic Engineering, Northwest A & F University, Xianyang 712100, China
Shilin Zhang: College of Mechanical and Electronic Engineering, Northwest A & F University, Xianyang 712100, China
Qiwei Li: College of Mechanical and Electronic Engineering, Northwest A & F University, Xianyang 712100, China
Kezhou Chen: College of Mechanical and Electronic Engineering, Northwest A & F University, Xianyang 712100, China
Yuxiang Huang: College of Mechanical and Electronic Engineering, Northwest A & F University, Xianyang 712100, China

Agriculture, 2022, vol. 12, issue 5, 1-21

Abstract: This study aimed to improve the measurement accuracy of the discrete element method (DEM) simulation parameters of sorghum seeds for enhanced model accuracy. We measured the intrinsic and contact parameters of sorghum seeds, extracted the outline of the seeds by 3D scanning, and used the multi-spherical particle model filling method in the EDEM (Version 2020) software to obtain the simulation model of the seeds. By simulating the free-fall, slope slip, slope rolling, and rolling experiments of sorghum seeds–photosensitive resin material, we calibrated the collision restitution coefficient of the sorghum seeds–photosensitive resin material to 0.690, static friction coefficient to 0.345, and rolling friction coefficient to 0.040. Through the steepest ascent search and central composite design experiments, we calibrated the collision restitution coefficient of sorghum seeds–sorghum seeds to 0.400, the static friction coefficient to 0.450, and the rolling friction coefficient to 0.043. The angle of repose of the parameter combination and the angle of repose of the physical experiment (33.82°) were verified, and the relative errors of the coefficients were 0.7%, 0.25%, and 0.3%, respectively, indicating that the established model had a high simulation accuracy and reliability. These results show that the established sorghum seeds model and the optimally calibrated parameter combination are effective for DEM studies on sorghum seeds.

Keywords: sorghum; discrete element method; parameters; measurement; calibration (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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