黏土与松土部件互作的离散元仿真标定与试验  

Discrete Element Simulation Calibration and Test of Interaction between Clay and Loose Soil Components

作　　者：范维 张富贵[1] 闫建伟[1] 郑乐 潘东彪 韩忠禄 Fan Wei;Zhang Fugui;Yan Jianwei;Zheng Le;Pan Dongbiao;Han Zhonglu(School of Mechanical Engineering,Guizhou University,Guiyang 550025,China;Guizhou Agricultural Machinery Technology Extension Station,Guiyang 550003,China)

机构地区：[1]贵州大学机械工程学院,贵阳550025 [2]贵州省农业机械技术推广总站,贵阳550003

出　　处：《农机化研究》2024年第1期177-182,190,共7页Journal of Agricultural Mechanization Research

基　　金：贵州省科技厅重大专项(黔科合重大专项字[2019]3014-3)。

摘　　要：为了提高白萝卜收获机关键部件松土铲的离散元仿真结果与实际情况的吻合度,利用台架实验和EDEM软件仿真相结合的方式,对黏壤土与松土铲之间接触的离散元仿真参数进行标定。以堆积角和滚动距离作为响应值,通过四因素三水平正交组合试验,分别建立土壤与土壤、土壤与触土材料之间的回归模型,并对回归模型进行分析,得到土壤含水率为(21±0.1)%时模型参数的解最优,分别为:土壤与土壤之间JKR为8.884J/m2,恢复系数为0.275,静摩擦因数为0.504,滚动摩擦因数为0.038;土壤与接触材料之间的仿真参数JKR为6.975J/m2,恢复系数为0.428;静摩擦因数为0.054;滚动摩擦因数为0.054。为了验证离散元仿真模型参数最优解与实际情况的吻合度,开展了基于最优参数下的台架实验与仿真试验,结果表明:台架实验松土铲的黏土量与仿真的相对误差为5.70%,仿真结果与台架试验基本一致,验证了离散元仿真参数模型的可靠性。In order to improve the consistency between the discrete element simulation results of the turnip harvester's loose soil shovel and the actual situation,the discrete element simulation parameters of the contact between clay loam and loose soil shovel were calibrated by the combination of bench experiment and EDEM software simulation.Taking the accumulation angle and rolling distance as response values,the regression models between soil and soil and between soil and soil touching material were established through the orthogonal combination test of four factors and three levels,and the regression model was analyzed.The optimal solution of model parameters was obtained when the soil moisture content was 21%±0.1%,which were as follows the soil-to-soil JKR is 8.884J/m2,the recovery coefficient is 0.275,the static friction coefficient is 0.504,and the rolling friction coefficient is 0.038.The simulation parameter between soil and contact material is 6.975J/m2 JKR.The recovery coefficient is 0.428.Static friction coefficient is 0.054;The rolling friction coefficient is 0.054.Parameter optimal solution in order to verify the discrete element simulation model and the actual situation of inosculation,carried out the experiment and simulation based on the optimal parameters of test bench test,the results showed that the amount of clay break shovel bench experiment and simulation of relative error is 5.70%,the results of simulation and bench test,verify the reliability of the discrete element simulation parameter model.

关 键 词：松土铲 离散元法 参数标定 黏土量 黏壤土 

分 类 号：S222.2[农业科学—农业机械化工程] S220.3[农业科学—农业工程]