| Discrete element simulation parameter calibration of pea grains at harvest time |
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| DOI：10.7606/j.issn.1000-7601.2022.06.31 |
| Key Words: pea grain parameter calibration stacking angle simulation experiment |
| Author Name | Affiliation | | ZHANG Keping | College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | HOU Chuankai | College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | SUN Bugong | College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | SU Zhanke | College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| To solve the lack of accurate discrete element parameters in simulation of threshing and cleaning of pea grains at harvest time, the parameters of pea grains were calibrated by combining physical and simulation test. The significant parameters were chosen by using the Plackett\|Burman test while the evaluation index was the grain stacking angle. The optimal combination of significance parameters was found by applying the steepest climbing test and the Box\|Behnken test, and the simulation test was used to calibrate the non\|significant parameters. The results showed that the inter grain collision recovery coefficient, static friction coefficient and rolling friction coefficient were 0.364, 0.519, and 0.444 respectively. The recovery coefficient, static friction coefficient and rolling friction coefficient of the pea\|steel collision were 0.505, 0.462, and 0.090 respectively. Moreover, the stacking angles of physical and simulation test were 19.841° and 19.714° respectively, with a relative error of 0.64%. The study provides a reference for discrete element simulation analysis of the mechanized harvesting of pea. |
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