Study on Pulling Dynamic Characteristics of White Radish and the Optimal Design of a Harvesting Device

The loss rate is an important index to evaluate the harvesting performance of white radish. To reduce rate, it necessary analyze pulling dynamic characteristics radish and then optimize structure operating parameters device. In this paper, according growth in field, discrete element method (DEM) was used simulate process. force calculated using Edinburgh elasto-plastic adhesion model (EEPA), effects soil bed compactness, speed angle on were analyzed. tests mechanics carried out laboratory verify accuracy DEM simulation results. results showed that soft with compactness less than 2.8 MPa, generally smaller leaf breaking force, feasible pull directly. While a high install loosening shovel thus reducing due breakage. device designed characteristics, different fields. Statistical show when compaction increased from 1.47 MPa 2.21 average 0.68% 1.75%, damage 2.41% 2.70%. Similarly, forward 0.18 0.47 m/s, 1.08% 1.30%, 2.34% 2.74%. Overall, maximum could be controlled below 2.0% 3.0%, respectively. hard bed, can effectively reduced 15% 2.5% by installing shovel.