Calibration and Tests for the Discrete Element Simulation Parameters of Fallen Jujube Fruit

Gaokun Shi, Jingbin Li, Longpeng Ding, Zhiyuan Zhang, Huizhe Ding, Ning Li and Za Kan
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Gaokun Shi: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832000, China
Jingbin Li: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832000, China
Longpeng Ding: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832000, China
Zhiyuan Zhang: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832000, China
Huizhe Ding: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832000, China
Ning Li: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832000, China
Za Kan: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832000, China

Agriculture, 2021, vol. 12, issue 1, 1-15

Abstract: Discrete element method (DEM) simulation is an important method to analyze the interaction relationship between materials and equipment, and to develop machinery and/or equipment. However, it is necessary to input specific simulation parameters when establishing a DEM simulation model. In this study, the interval values were measured through angle of repose tests of fallen jujube fruit (FJF), and the simulation angle of repose tests for FJF were established with EDEM software (DEM Solutions Ltd. Edinburgh, Scotland, UK). Then, the Plackett-Burman design, steepest ascent search experiment, and center composite design experimental methods were utilized to obtain the specific values of the simulation parameters from the interval values. The results showed that significant influencing factors in the simulation angle of repose include the Poisson’s ratio, the static friction coefficient between FJF, and the static friction coefficient between FJF and the steel plate, for which the optimal values were 0.248, 0.480, and 0.309, respectively. The angle of repose tests’ results showed that the error was 0.53% between the simulation angle of repose (29.69°) and the angle of repose (29.85°). In addition, the flow rate test results showed that the average error was 5.84% between the physical and simulation tests. This indicated that the calibrated parameters were accurate and reliable, and that the simulation model can accurately represent the physical tests. Consequently, this study provides an EDEM model of FJF that was essential in designing machinery and equipment through the EDEM simulation method.

Keywords: fallen jujube fruit; discrete element method; calibration; computer simulation; optimization (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: 2021
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