基于离散元的云南红壤仿真参数标定  

Calibration of Yunnan Red Soil Simulation Parameters Based on Discrete Element Method

作　　者：赵玉清 李诗沫[1,4] 谢钰 赵伟[1,4] 陈再兴 张悦 ZHAO Yuqing;LI Shimo;XIE Yu;ZHAO Wei;CHEN Zaixing;ZHANG Yue(College of Electrical and Mechanical Engineering,Yunnan Agricultural University,Kunming 650201,China;College of Big Data,Yunnan Agricultural University,Kunming 650201,China;School of Transportation Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yunnan Key Laboratory of Crop Production and Intelligent Agriculture,Kunming 650201,China;College of Mechanical and Electrical Engineering,Yunnan Open University,Kunming 650500,China)

机构地区：[1]云南农业大学机电工程学院,昆明650201 [2]云南农业大学大数据学院,昆明650201 [3]昆明理工大学交通工程学院,昆明650093 [4]云南省作物生产与智慧农业重点实验室,昆明650201 [5]云南开放大学机电工程学院,昆明650500

出　　处：《沈阳农业大学学报》2024年第4期465-473,共9页Journal of Shenyang Agricultural University

基　　金：云南省重大科技专项—绿色食品国际合作研究中心项目(2019ZG009);云南省教育厅科学研究基金项目(2020Y198)。

摘　　要：为给云南红壤作业条件下的触土部件设计与优化提供更精准的参数,选用EDEM中Hertz-Mindlin with JKR Co-hesion接触模型标定云南地区红壤数值模拟参数。首先,采用物理试验测定红壤的基本物性参数以及接触参数,以物理试验结果为基础,确定仿真试验参数范围,开展Plackett-Burman试验,对仿真试验进行显著性筛选,得到对堆积角影响显著的3个参数:红壤-红壤静摩擦因数、红壤-45^(#)钢板间恢复系数和JKR表面能。随之设计最陡爬坡试验,优化显著性参数的最优取值范围。之后开展Box-Behnken试验,以红壤在45^(#)钢板上的堆积角为响应值,对二阶回归方程进行优化,获得最优接触参数组合:红壤-红壤静摩擦系数为0.502、红壤-45^(#)钢板恢复系数0.464、JKR表面能4.938 J·m^(-2)。最后以最优接触参数组合进行仿真试验,得出结果与物理试验误差为1.7%,无明显差异。此结果表明标定的云南红壤的离散元仿真参数可靠度较高,可为云南地区红壤作业条件下的触土部件的设计与优化提供基础参数。In order to provide more accurate parameters for the design and optimization of soil contact components in red soil of Yunnan,the Hertz-mindlin with JKR Cohesion contact model in EDEM was used to calibrate the numerical simulation parameters of red soil in Yunnan.Firstly,the basic physical properties and contact parameters of red soil were determined by physical tests,and the parameters of simulation tests were determined based on the results of physical tests.The Plackett-burman test was carried out to screen the significant factors affecting repose angle of simulation tests,three parameters,the static friction coefficient between red soil and red soil,the recovery coefficient between red soil-45^(#)steel plates and the surface energy of JKR,were obtained.Then the steepest climbing test was designed to optimize the optimal value range of significance parameters.And the Box-Behnken experiment was carried out to optimize the second-order regression equation by taking the repose angle of red soil on 45^(#)steel plate as the response value,the optimal combination of contact parameters was obtained:the static friction coefficient of red soil-red soil was 0.502,the recovery coefficient of red soil-45^(#)steel plate was 0.464,and the surface energy of JKR was 4.938 J·m^(-2).Finally,the optimal combination of contact parameters is used to carry out the simulation experiment,and the result shows that the error between the simulation result and the physical experiment is 1.7%,and there is no obvious difference.This result indicates that the reliability of the discrete element simulation parameters for the calibrated Yunnan red soil is relatively high,and it can provide basic parameters for the design and optimization of soil-engaging parts under the condition of red soil operation in Yunnan.

关 键 词：离散元法 参数标定 红壤 堆积角 

分 类 号：S224.2[农业科学—农业机械化工程]