干旱地区农业研究2025，Vol.43Issue(3)：287-298,12.DOI:10.7606/j.issn.1000-7601.2025.03.29
大果沙棘籽和果渣的离散元仿真参数标定
Calibration of discrete element simulation parameters for sea buckthorn seeds and pomace
摘要
Abstract
To address the issue of lacking accurate contact parameters in the mechanical separation of sea buckthorn seed and pomace mixtures after the beating of sea buckthorn berries to extract raw juice,the physical and contact parameters of the seeds and pomace were calibrated through both physical and simulation tests.The intrinsic parameters of sea buckthorn seeds were calibrated through physical tests.Using free fall,inclined plane slip,in-clined plane rolling tests,and simulation analysis,the collision recovery coefficient,static friction coefficient,and rolling friction coefficient between the sea buckthorn seed and Q235 steel plate were determined to be 0.550,0.449,and 0.039,respectively.Through the steepest climb test and Box-Behnken test,the contact parameter com-bination between sea buckthorn seed particles was optimized,and the collision recovery coefficient,static friction coefficient and rolling friction coefficient between sea buckthorn seed particles were determined by simulation test to be 0.150,0.344,and 0.013,respectively.The Plackett-Burman test was designed to screen out three parameters related to fruit residue that had the most significant influence on the accumulation angle of the mixed materials of sea buckthorn seeds and fruit residue:Shear modulus of fruit slag,static friction coefficient of fruit slag and rolling friction coefficient of fruit slag were determined by the steepest climb test.The second-order regression equation was established by the Central Composite test,and the optimal parameter combination of the three significant parameters was obtained by optimizing and solving the regression equation:the shear modulus of the slag was 1.57×106,the static friction coefficient between the slag and the slag was 0.303,and the rolling friction coefficient between the slag and the slag was 0.145.The relative error between the simulated stacking angle and the actual stacking angle was 2.78%through EDEM simulation.This study provides theoretical basis and model for the separation technology of sea buckthorn seeds and pomace.关键词
沙棘籽/果渣/堆积角/仿真试验/EDEMKey words
sea buckthorn seed/pomace/stacking angle/simulation test/EDEM分类
农业科技引用本文复制引用
乔伟豪,胡靖明,杨梅,闫会丽,张文洁,王清泽..大果沙棘籽和果渣的离散元仿真参数标定[J].干旱地区农业研究,2025,43(3):287-298,12.基金项目
国家自然科学基金(52065006) （52065006）
甘肃省科技计划资助项目(22YF7NA114) （22YF7NA114）
