中国农业科技导报2025，Vol.27Issue(3)：112-121,10.DOI:10.13304/j.nykjdb.2023.0687
油茶茶枯离散元模型参数标定与试验
Calibration and Validation of Discrete Element Model for Camellia oleifera Seed Meal
摘要
Abstract
Accurately obtaining the discrete element simulation model parameters of organic fertilizer for Camellia oleifera seed meal(COSM)is the key for optimizing the design of the COSM fertilization device using simulation methods.Taking the COSM with water content of 2.88%as the research object,and"Hertz-Mindlin with JKR"in EDEM software as the contact model,the range of static friction coefficient and rolling friction coefficient between COSM and stainless steel were determined by a friction coefficient meter.Other parameters that were difficult to measure,such as the Poisson's ratio and shear modulus of COSM,were obtained by contact friction test combining the GEMM material library,to provide a horizontal selection for the Plackett-Burman test.Through the Plackett-Burman experiment,3 from 9 parameters were selected that more significantly impacted stacking angle including COSM,the static friction coefficient of COSM-COSM,the static friction coefficient of COSM-stainless steel and the rolling friction coefficient of COSM-COSM.Then,according to the results of the steepest climbing test to further using the organic fertilizer accumulation angle of COSM as the response value,a second-order regression model was obtained based on the Box-Behnken experiment to determine the accumulation angle and significance parameters.Using the stacking angle of 35.42° measured in physical experiments as the response target,seek the optimal solution to the regression equation,and the optimal parameter combination was obtained as:the static friction coefficient of COSM-COSM of 1.01,the static friction coefficient of COSM-stainless steel of 0.34,and the rolling friction coefficient of COSM-COSM of 0.20.The simulation experiments of stacking and mold hole compression were conducted under the condition of optimal solutin,it was found thatthe relative error between the simulated stacking angle and the physical test results was found to be 2.96%,and the stacking shape had a high degree of similarity.The relative error between the simulated extrusion force and the actual die hole compression test was 1.79%,which verified that the calibrated parameters were accurate.The research results provided theoretical references for analyzing the complex interaction between the COSM and fertilizer equipment and designing a high-efficiency and precise fertilizer equipment.关键词
油茶茶枯/堆积角/有机肥/离散元/参数标定Key words
seed meal in camellia oleifera/resting angle/organic fertilizer/discrete element/parameter calibration分类
农业工程引用本文复制引用
许静,李晗,陈平录,罗江旎,唐承露,刘木华..油茶茶枯离散元模型参数标定与试验[J].中国农业科技导报,2025,27(3):112-121,10.基金项目
江西省农业关键核心技术攻关项目(JXNK20230804-03) （JXNK20230804-03）
井冈山农高区省级科技专项"揭榜挂帅"项目(20222-051256) （20222-051256）
江西省林业局油茶研究专项(YCYJZX[2023]211). （YCYJZX[2023]211）
