CALIBRATION AND OPTIMIZATION OF DISCRETE ELEMENT PARAMETERS FOR COTTON STALK-RUBBER BELTS INTERACTIONS

This study aims to accurately calibrate the interaction between cotton stalks and rubber belts in agricultural machinery using the Discrete Element Method (DEM). Through physical experiments, key parameters such as the collision recovery coefficient, static friction, and rolling friction were measured and validated through simulations in EDEM. Optimal values were identified as 0.446, 1.146, and 0.0194, respectively. Full-factorial analysis revealed significant effects on repose angle. Repeated trials confirmed a deviation of only 0.72% from experimental results, validating the calibration method. These findings provide a foundation for improving cotton stalk harvesting and transportation efficiency.