离散元法
箱子
土壤质地
壤土
校准
直剪试验
粒子(生态学)
土工试验
岩土工程
材料科学
数学
生物系统
剪切(地质)
土壤科学
机械
土壤水分
环境科学
地质学
复合材料
算法
物理
统计
海洋学
生物
作者
Dongxu Yan,Jianqun Yu,Yang Wang,Long Zhou,Ye Tian,Na Zhang
出处
期刊:Agriculture
[Multidisciplinary Digital Publishing Institute]
日期:2022-09-08
卷期号:12 (9): 1421-1421
被引量:18
标识
DOI:10.3390/agriculture12091421
摘要
In order to establish a Discrete Element Method (DEM) model of soil particles, the soil in the laboratory soil bin was used as the research object. The soil texture was determined to be sandy loam by sieving, and the shape of the soil particles was analyzed by an image particle analyzer to establish a geometric model of the soil particles. The Edinburgh Elasto-Plastic Adhesion (EEPA) model was chosen as the contact model for the soil particle simulation analysis, and the accuracy of the model selection was determined by texture tests. The parameters in the contact model played a crucial role in the results of the simulation. Test methods were used to obtain parameters for the soil particles that were easy to measure. For parameters that could not be measured in the contact model, a direct shear test was used as the calibration test, and after screening the sensitive parameters using the PB test, the response surface method was used to calibrate the sensitive parameters. The accuracy of the calibration results was verified by comparing the simulation and test results of the direct shear test under different loadings.
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