Discrete elemental parameter calibration of stacking behavior of sugarcane tail leaf sieved material

Abstract

To improve the accuracy of discrete element simulation parameters of sugarcane tail-leaf (STL) feed during dust removal and crushing, this study used a combination of physical tests and EDEM software simulations to calibrate the discrete element simulation parameters of crumbs and dust in the feed. Taking the experimental physical stacking angle (SA) as the response value, the second-order regression models of SA and significant factors were established by Plackett-Burman test, steepest climb test, and Box-Behnken test. Variance analysis and interaction effect analysis were conducted. Taking the accumulation angle of 41.27° obtained by physical experiments as the target value, the significant parameters were optimized. The optimal combination of the following parameters was obtained: tail stem-dust static friction coefficient (SFC) of 0.46, tail leaf-dust coefficient of sliding friction (COSF) of 0.205, JKR surface energy of 0.26, and dust-steel collision recovery coefficient (CRC) of 0.338. Through software simulation verification, the average value was 40.81°, and the relative error of the SA with the physical experiment was 1.13%. The results showed that the calibrated parameters are real and reliable, which can provide a theoretical reference for the design optimization of the straw crushing device, feed processing device, and other related components.

Alfalfa Stalk Crushing Simulation Test and Parameter Optimization Method

“…The alfalfa stems were simulated as fine particles that are held together by bonds. The fracture of these bonds was used to assess the effectiveness of the crushing device in breaking down alfalfa stems [13][14][15].…”

“…EDEM is a simulation software designed for analyzing discrete particles. It is based on particle collision theory and discrete element theory and incorporates robust coupling functions to simulate particles, fluids, and mechanical equipment [14][15][16]. In this study, the EDEM simulation software is employed to conduct a discrete element analysis, which aims to uncover the microscopic interaction between alfalfa stem particles and the mechanism of crushing alfalfa stems.…”