Abstract
The discrete element method (DEM) is conducive to optimizing bulk material conveying equipment. Calibration experiments are essential in DEM simulation, requiring particles to accurately replicate the flow behavior from rapid motion (up to a maximum of 6 m/s) to stable accumulation in bulk material handling. In typical calibration experiments, excessively high particle velocities will affect the stability of the characterization data in stable accumulation. The paper presents an innovative calibration approach that enables reliable prediction of both impact forces during rapid flow and bulk density during stable accumulation. A single-factor numerical test determines the sensitivity of simulation parameters to calibration experiments, and comprehensive testing methods ensure that equivalent DEM contact parameters align with experimental particle behavior. Finally, verification experiments indicate that the proposed calibration experiments in this study can successfully replicate the particle flow behavior during bulk material handling.
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