VIBRATION PARAMETER CALIBRATION AND TEST OF TIGER NUT BASED ON DISCRETE ELEMENT METHOD
基于离散元法的油莎豆振动参数标定与试验
DOI : https://doi.org/10.35633/inmateh-73-02
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Abstract
In this study, based on the discrete element method, a simulation model was established to simulate the accumulation state of Tiger nut. Taking the angle of repose of Tiger nut as the response value, the Plackett-Burman test, the steepest climbing test and the central composite test were used to screen out the significant influencing factors and the optimal level, and the electromagnetic vibration hopper bench test was carried out to verify. The results showed that the relative error between the simulated angle of repose and the actual angle of repose was only 0.381 % when the static friction coefficient between the Tiger nut tubers was 0.35 and the rolling friction coefficient between the Tiger nut tubers was 0.036. The fitting degree of the prediction model of electromagnetic vibration hopper conveying time is 96.32 %, and the fitting degree of mass flow rate is 94.57 %. The calibrated parameters of Tiger nut can accurately reflect the actual test results, which can provide theoretical basis for the study of Tiger nut parameters and discrete element simulation.
Abstract in Chinese