USING THE DISCRETE ELEMENT METHOD TO ANALYZE AND CALIBRATE A MODEL FOR THE INTERACTION BETWEEN A PLANTING DEVICE AND SOIL PARTICLES

Dynamic soil behaviour at the contact interface during transplanting makes it difficult to ensure quality. To solve this problem, Hertz-Mindlin with bonding model was used calibrate parameters of soils in Inner Mongolia. Based on response surface design principle, four-factor and three-level tests were performed using repose angle as an evaluation index, following influence factors considered: soil-soil restoration coefficient, soil-steel coeficient, static friction coefficient coefficient. A regression analysed, optimization procedure yielded optimum combination parameters: a 0.45, 0.35, 0.85 rolling 0.13. This optimal simulate interface. The particle dynamic mass flow analyse behaviour, showing that average gradual opening duckbilled planter tends increase over time; when gradually leaves soil, particles corner unit causes reduction fluctuation range flow, which exhibits wave-like change. After has left changes stabilize. planter-soil discrete element simulation verified. results study provide reference for structure.