Establishment and Calibration of Discrete Element Model for Buckwheat Seed Based on Static and Dynamic Verification Test

Aiming at the lack of accurate and reliable discrete element simulation parameters for design buckwheat metering devices seeders based on method, an seed model was obtained by calibrating parameters. In this study, particle models were established manual automatic filling methods. order to improve accuracy models, calibrated, static cylinder-lifting test dynamic seed-metering used verify results. A 3D using CT scanning a 7-sphere multi-sphere established. The physical contact measured uniaxial compression test, drop friction coefficient measurement test. Plackett–Burman steepest ascent path obtain optimal parameter combination We conducted tests two under combination. results show that, compared with values stacking angle, relative errors 36-sphere are 1.04% 0.50%, respectively. When rotation speed range seeding wheel is 20~60 r/min, average between simulated value 15.85% 4.69%, effective working length 20~40 mm, 22.18% 9.07%, Regardless whether or motion simulation, has higher accuracy. in study will provide support special quality mechanized sowing operation.