CALIBRATION OF SOIL DISCRETE ELEMENT CONTACT PARAMETER IN RHIZOME MEDICINAL MATERIALS PLANTING AREA IN HILLY REGION

Aiming at the lack of accurate and reliable discrete element simulation parameters in study soilmachine interaction mechanism design machinery planting areas rhizomes hilly mountainous areas, EDEM software was used to calibrate parameters. The soil angle repose test contact between particles, sliding machinery. Box-Behnken optimization method establish multiple regression model angle, optimal particles were obtained by solving model. combination conduct tests on errors physical 3.94% 3.66%, respectively. In order further verify accuracy calibrated optimized parameters, rotary tillage ridge field for comparative analysis, relative simulated results height, top width, ditch bottom width obtained, 4.45%, 6.96%, 8.56%, error is within acceptable range. ridging effects are consistent tests, confirming reliability calibration