Parameter Calibration of Soil in the Poyang Lake Region Based on Discrete Element Method
Parameter Calibration of Soil in the Poyang Lake Region Based on Discrete Element Method
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DOI：
10.3844/ajbbsp.2020.538.548
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发表时间：
2020-12
影响因子：
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通讯作者：
Zhu Baoyu;Liu Jun'an;Chen Xiongfei-;Yu Jiajia;Liu Muhua;Qingsong Zhang
中科院分区：
文献类型：
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作者：
Zhu Baoyu;Liu Jun'an;Chen Xiongfei-;Yu Jiajia;Liu Muhua;Qingsong Zhang
为了获得鄱阳湖区直播前的土壤参数，对都昌县、鄱阳县和新建区的土壤性质进行了重新采集，建立了离散元法模型。采用侧壁塌陷法测定水稻土的休止角为53.00°。使用 11 个参数与 Hertz-Mindlin 和 Johnson-Kendall-Roberts (JKR) 接触模型建立 EDEM 仿真模型。在Plackett-Burman实验的基础上，通过最速上升实验和Box-Behnken实验研究了影响休止角的因素，并建立了回归方程。由此得到最优参数，偏差为2.23%。然后引入沟宽和沟深对土壤模型进行验证，综合误差为11.60%。因此，可以利用直播前的土壤模型来优化鄱阳湖地区机械直播的结构，从而达到降阻增效的目的。
In order to obtain the soil parameters of Poyang Lake Region before direct seeding, the soil properties of Duchang County, Poyang County and Xinjian District recollected and the discrete element method model is established. The angle of repose of paddy soil is 53.00° tested by the lateral wall collapse method. Eleven parameters are used to establish EDEM simulation model with the Hertz-Mindlin and the Johnson-Kendall-Roberts (JKR) contact model. Based on the Plackett-Burman experiment, the Steepest ascent experiment and Box-Behnken experiment are carried out to study the factors affecting the angle of repose and the regression equation is established. Thus The optimal parameters are obtained with the deviation of 2.23%. Then the furrow width and depth are introduced to verify the soil model and the comprehensive error is 11.60%. Therefore, the soil model before direct seeding can be used to optimize the structure of mechanical direct seeding in Poyang lake region, so as to achieve the purpose of reducing resistance and increasing efficiency.