肉苁蓉种子离散元仿真参数标定  

Parameter Calibration for Discrete Element Simulation of Cistanche Seeds

作　　者：白志业 蒙贺伟[1] 彭慧杰[1] 戚江涛[1] 李亚萍[1] 坎杂[1] Bai Zhiye;Meng Hewei;Peng Huijie;Qi Jiangtao;Li Yaping;Kan Za(College of Mechanical and Electrical Engineering,Shihezi University,Shihezi 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

出　　处：《农机化研究》2025年第2期19-26,53,共9页Journal of Agricultural Mechanization Research

基　　金：国家自然科学基金项目(32101634)。

摘　　要：为寻求肉苁蓉种子离散元模型的物料特性参数,采用物理和仿真试验相结合的方法,以不同物性参数组合下肉苁蓉种子休止角为响应值,采用Plackett-Burman试验对参数进行筛选,获取显著性参数,即肉苁蓉种间静摩擦因数、肉苁蓉种间动摩擦因数、肉苁蓉种子-钢板静摩擦因数、肉苁蓉种子-钢板恢复系数。通过Box-Behnken试验建立休止角与显著性参数回归模型并优化,获取接触参数最优值,即肉苁蓉种间静摩擦因数为0.65、肉苁蓉种间动摩擦因数为0.07、肉苁蓉种子-钢板恢复因数为0.54、肉苁蓉种子-钢板静摩擦因数为0.43。通过仿真与物理试验对比验证,得到二者相对误差为2.05%,表明标定参数可为肉苁蓉种子播种机械仿真提供数据依据。The Cistanche seeds physical parameters of the discrete element simulation model were calibrated by a comprehensive method combining physical and simulation experiments.With the resting angle of Cistanche under different physical parameter combinations as the response value,the experimental factors with significant influence on the repose angle were screened by Plackett-Burman experiment.These parameters include the coefficient of static friction and rolling friction between seeds,as well as the coefficient of static friction and of restitution between seeds-steel plates.The second-order regression model of repose angle and significance parameters was established by Box-Behnken experiment,and the optimal values of significant parameters were obtained,where the coefficient of static friction and rolling friction between seeds was 0.65 and 0.07,and the coefficient of static friction and of restitution between seeds-steel plates was 0.43 and 0.54,respectively.Through comparison test,the final results of the simulation and physical tests were compared in this study.The comparison results showed that the relative error of the two test results was 2.05%,which proved that the discrete element model and the contact parameters could be used for the discrete element simulation test in the optimization of design parameters in related machine.

关 键 词：肉苁蓉种子 休止角 离散元 参数标定 播种机械 

分 类 号：S183[农业科学—农业基础科学]