| 张克平,侯传凯,孙步功,苏占科.收获期豌豆籽粒离散元仿真参数标定[J].干旱地区农业研究,2022,40(6):286~294 |
| 收获期豌豆籽粒离散元仿真参数标定 |
| 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 |
| 中文关键词: 豌豆籽粒 参数标定 堆积角 仿真试验 |
| 英文关键词:pea grain parameter calibration stacking angle simulation experiment |
| 基金项目:甘肃省自然科学基金（20JR5RA031）；甘肃省教育厅产业支撑计划项目（2021CYZC-29）；兰州市科技计划项目 (2019-4-55)；国家自然科学基金项目（51965002）；甘肃省重点研发项目（20YF8NA134） |
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| 中文摘要: |
| 针对收获期豌豆籽粒在脱粒与清选仿真模拟中缺乏准确离散元仿真参数的难题，采用物理试验和仿真试验相结合的方法对豌豆籽粒仿真参数进行标定。以籽粒堆积角为评价指标，通过Plackett-Burman试验筛选显著性参数，借助最陡爬坡试验和Box-Behnken试验得到显著性参数最优组合，通过仿真试验标定非显著性参数。结果表明：籽粒间碰撞恢复系数、静摩擦系数和滚动摩擦系数分别为0.364、0.519和0.444；豌豆籽粒-钢碰撞恢复系数、静摩擦系数和滚动摩擦系数分别为0.505、0.462和0.090；物理和仿真试验堆积角分别为19.841°和19.714°，其相对误差为0.64%。研究可为豌豆机械化收获过程离散元仿真分析提供参考。 |
| 英文摘要: |
| 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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