新疆农田粉土离散元仿真参数标定  

Parameter Calibration of Discrete Element Simulation of Farmland Silt in Xinjiang

作　　者：李清超 郑炫[2] 刘进宝 杨怀君[2] 王子龙 张鲁云[2] LI Qingchao;ZHENG Xuan;LIU Jinbao;YANG Huaijun;WANG Zilong;ZHANG Luyun(College of Mechanical and Electrical Engineering,Shihezi University,Shihezi Xinjiang 832000,China;Institute of Mechanical Equipment,Xinjiang Academy of Agricultural and Reclamation Sciences,Shihezi Xinjiang 832000,China)

机构地区：[1]石河子大学机械电气工程学院,新疆石河子832000 [2]新疆农垦科学院机械装备研究所,新疆石河子832000

出　　处：《新疆农业科学》2022年第8期2014-2024,共11页Xinjiang Agricultural Sciences

基　　金：兵团区域创新引导计划(2021BB015);石河子市中青年科技创新骨干人才(2021RC01)。

摘　　要：【目的】标定新疆地区粉土离散元仿真模型,量化分析农业机械触土部件与土壤的相互作用。【方法】采用EDEM离散元仿真软件,运用斜坡试验标定土壤与触土材料(65 Mn)之间的接触参数,堆积角试验标定土壤与土壤之间的接触参数,以斜坡滚动距离为优化目标进行回归分析。【结果】土壤与65 Mn之间离散元模型参数的一种优化组合为恢复系数0.51,静摩擦系数0.56,动摩擦系数0.08,JKR表面能4.12;以堆积角为优化目标,土壤之间离散元模型参数的一种优化组合为恢复系数0.57,静摩擦系数0.65,动摩擦系数0.23,JKR表面能4.49。滚动距离和堆积角的误差分别为6.05%、1.28%。【结论】在建立的仿真模型条件下,在8、9、10 km/h作业速度下,犁体仿真试验与实际试验的工作阻力相对误差为5.69%、5.95%、6.49%,建立的模型真实可靠。【Objective】To calibrate the discrete element simulation model of silt in Xinjiang and quantitatively analyze the interaction between soil touching parts of agricultural machinery and soil.【Methods】EDEM discrete element simulation software was used,the contact parameters between soil and soil contact material(65 Mn)were calibrated by slope test,and the contact parameters between soil and soil were calibrated by stacking angle test.【Results】EDEM distance of slope was taken as the optimization objective,the regression analysis was carried out,and an optimal combination of discrete element model parameters between soil and 65 Mn was obtained:recovery coefficient 0.51,static friction coefficient 0.56,dynamic friction coefficient 0.08,JKR surface energy 4.12;Taking the stacking angle as the optimization objective,an optimal combination of discrete element model parameters between soils is obtained:recovery coefficient 0.57,static friction coefficient 0.65,dynamic friction coefficient 0.23 and JKR surface energy 4.49.The accuracy of the discrete element contact model was verified.The simulation test of slope test and stacking angle test was compared with the actual test.The errors of rolling distance and stacking angle were 6.05%and 1.28%respectively.【Conclusion】Under the conditions of the established simulation model,the relative errors between the plow body simulation test and the actual test were 5.69%,5.95%and 6.49%at the working speeds of 8,9 and 10 km/h.

关 键 词：粉土土壤 离散元法 耕翻 铧式犁 参数标定 

分 类 号：S222.12[农业科学—农业机械化工程]