Simulation Parameter Calibration of Broad Bean Seed Discrete Element Model

In order to determine simulation parameters of discrete element model of broad bean seeds, discrete element model of broad bean seeds was established by using basic ball element combination method．Contact parameters between broad bean seeds and steel plate were measured by physical test．Discrete element simulation parameters of broad bean seeds were calibrated in EDEM software．Collision recovery coefficient between broad bean seeds and steel plate was 0.46, static friction coefficient was 0.437, and rolling friction coefficient was 0.053．Taking interspecies contact parameters as factors, relative error between measured accumulation angle and simulated accumulation angle as index, steepest climbing test and three-factor quadratic orthogonal rotation combination design test were carried out．Collision recovery coefficient of broad bean was 0.25, static friction coefficient was 0.53, and rolling friction coefficient was 0.083．Simulation test was carried out by using the best parameter combination, and relative error between measured value and simulated value of seed accumulation angle of broad bean was 1.1%．Results showed that calibrated contact parameters could be used for discrete element simulation of broad bean seeds．