基于沉试验,对散列元素模拟模型的参数校准,用于浸泡田土壤
Zhou Tienan1, Hao Zhou1,2, Jiangtao Ji1,2
1College of Agricultural Equipment Engineering, Henan University of Science and Technology, Luoyang, China.
PloS one
|June 2, 2023
概括
准确的离散元素模拟模型用于田土壤对于优化农业机械至关重要. 这项研究对关键的土壤参数进行了校准,显著提高了田制过程的模拟准确性.
科学领域:
- 农业工程 农业工程
- 计算力学 计算力学 计算力学
- 土壤科学 土壤科学
背景情况:
- 离散元素方法 (DEM) 对于研究在田作业中的土壤机器相互作用至关重要.
- 缺乏准确的田土壤模型,阻碍了DEM在纸研究中的应用.
- 优化打设备需要精确模拟土壤的行为.
研究的目的:
- 使用赫茨-明德林与约翰逊-肯德尔-罗伯茨模型校准DEM参数,用于预先造土土壤.
- 为了确定重要的土壤参数,影响在纸模拟期间的沉降误差.
- 优化这些参数以提高模拟准确度.
主要方法:
- 使用赫茨-明德林与约翰逊-肯德尔-罗伯特斯DEM模型用于土土壤.
- 采用普莱克特-伯曼和最的上升测试来识别和范围的重要参数 (剪切模量,表面能量,摩擦系数).
- 应用了Box-Behnken设计,以建立回归模型并基于slump错误优化参数.
主要成果:
- 确定了土壤剪切模量,表面能量和土壤-铁板静态摩擦系数作为重要因素.
- 确定了最佳参数:表面能量 (3.257 J/m2),土壤剪切模量 (0.709 MPa) 和静态摩擦系数 (0.701).
- 在经过优化参数的模拟测试中,实现了2.04%的平均下滑误差.
结论:
- 校准的DEM参数准确地反映了土土壤的土壤行为.
- 这些经过验证的参数增强了田纸工艺的DEM模拟.
- 改进的模拟精度有助于优化农业机械设计和效率.
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