基于EDEM的猪粪接触参数标定  

Calibration of contact parameters for pig manure based on EDEM

作　　者：王黎明[1] 范盛远 程红胜 孟海波 沈玉君 王健 周海宾 Wang Liming;Fan Shengyuan;Cheng Hongsheng;Meng Haibo;Shen Yujun;Wang Jian;Zhou Haibin(College of Engineering,Heilongjiang Bayi Agricultural University,Daqing 163319,China;Institute of Energy and Environmental Protection,Chinese Academy of Agricultural Planning and Engineering,Beijing 100125,China;Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources,Ministry of Agriculture and Rural Affair,Beijing 100125,China)

机构地区：[1]黑龙江八一农垦大学工程学院,大庆163319 [2]农业农村部规划设计研究院农村能源与环保研究所,北京100125 [3]农业农村部资源循环利用技术与模式重点实验室,北京100125

出　　处：《农业工程学报》2020年第15期95-102,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家重点研发计划资助(2017YFD0800202)。

摘　　要：为准确快速获得畜禽粪便的接触参数,该研究通过物理堆积试验与仿真方法对猪粪接触参数进行了标定。测定了不同含水率下猪粪的堆积角,建立了含水率与堆积角的回归方程;基于Hertz-Mindlin with JKR球体粘结模型,进行了离散元仿真模拟;采用筛选试验设计(Plackett-BurmanDesign,P-BD)对10个初始参数进行了筛选,发现JKR(Johnso-Kendall-Roberts)表面能、颗粒间滚动摩擦系数、颗粒间碰撞恢复系数对猪粪堆积角影响显著;并根据响应曲面试验设计(Box-BehnkenDesign,B-BD)建立了堆积角与显著性参数的二阶回归模型,得到了3个显著性参数值分别为JKR表面能0.03J/m^2、颗粒间滚动摩擦系数0.27、颗粒间碰撞恢复系数0.54;将仿真所得堆积角与物理试验值进行对比验证,相对误差为4.27%。结果表明,该研究提出的标定方法能准确模拟物理堆积试验,可为畜禽粪便接触参数的标定提供参考。To obtain the contact parameters of livestock and poultry manure accurately and quickly,this study calibrated the contact parameters of pig manure by physical stacking test and simulation method.A stacking angle measurement test bench was designed,and the contour of the stacking slope was obtained by the image-digital simulation method,and a linear fitting was performed.Through the natural air-drying and the deionized water adjustment methods,the pig manure accumulation angle under different water content was measured,and a polynomial fitting model between the water content and the pig manure accumulation angle under different water contents was established.To obtain the actual stacking angle,the Hertz-Mindlin with JKR sphere bonding model was used,and the discrete element simulation of the physical stacking test was performed by EDEM2.7 Screening experiment design(Plackett-Burman Design,P-BD)was used to screen 10 initial parameters.It was found that JKR(Johnso-Kendall-Roberts)surface energy,particle-particle rolling friction coefficient,and particle-particle collision recovery coefficient had significant effects on the swine manure accumulation angle,and the other 7 factors had no significant effect on the accumulation angle.The best range of three significant influencing factors was determined by the steepest climbing test.The 7 non-significant influencing factors in this test were the intermediate values of the initial range,and the 3 significant parameters gradually were increased until the relative error between the simulated value and the physical test value reached the minimum.Based on the results of the response surface experiment design(Box-Behnken Design,B-BD),a quadratic polynomial model between the stacking angle and the three significant parameters was created.The analysis of the quadratic polynomial model variance showed that the model was meaningful.Under the condition that the model was significant and the miss-fit terms were not significant,the terms that did not significantly affect the results

关 键 词：粪 模型 标定 EDEM 接触参数 堆积角 

分 类 号：X220.1[环境科学与工程—环境科学]