基于离散元素方法对玉米种子的圆柱分级进行模拟分析和实验研究:对玉米种子的圆柱分级进行研究
Minji Liu1, Jiannan Wang1, Zhaoyan You1
1Nanjing Institute of Agricultural Mechanization, Ministry of Agriculture and Rural Affairs, Nanjing, Jiangsu, China.
PloS one
|October 23, 2025
概括
了解圆柱形分级器中的玉米种子运动对于效率至关重要. 离散元素模拟优化了分级参数,实现了93.83%的实际合格率,提高了种子分级性能.
科学领域:
- 农业工程 农业工程
- 计算机建模 计算建模
- 种子科学 种子科学
背景情况:
- 圆柱形分类器对于玉米种子分类至关重要.
- 目前的分级依赖于经验调整,这是由于对种子运动动态的理解不佳.
- 这导致效率低,性能不稳定.
研究的目的:
- 为了研究玉米种子的运动和分布模式在圆柱形分级器.
- 优化操作参数以提高分级效率和稳定性.
- 为了验证模拟模型来预测分级性能.
主要方法:
- 实验确定了玉米种子和分级气的关键模拟参数.
- 使用EDEM 2018软件开发了离散元件模型 (DEM).
- 在不同的操作参数 (旋转速度,倾斜角度,养率) 下,进行了对角实验,分析了种子运动速度和变化系数 (CV).
主要成果:
- 确定倾斜角 > 旋转速度 > 料率作为影响分级合格率的顺序.
- 倾斜角和旋转速度之间的相互作用显著影响了分级合格率.
- 优化参数 (47.08r/min,0.52°,303.07g/s) 的理论合格率为97.24%,实际合格率为93.83%.
结论:
- 离散元素模拟对于分析玉米种子运动动态在圆柱形分级中是有效的.
- 优化的参数显著提高了分级合格率和运营稳定性.
- 这项研究为提高玉米种子分类技术提供了宝贵的参考.
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