农业机械学报2018，Vol.49Issue(5)：125-135,142,12.DOI:10.6041/j.issn.1000-1298.2018.05.014
基于离散元的微型马铃薯仿真参数标定
Calibration of Simulation Parameters for Potato Minituber Based on EDEM
摘要
Abstract
In order to study the discrete element simulation physical parameters of potato minituber,the combination methods of experiment and simulation were used to calibrate contacting parameters of particle discrete simulation.The simulation experimental model was built in EDEM by using coefficient measurement model of restitution,particle-steel friction coefficient measurement model and particle-particle coefficient friction measurement model.The corresponding contacting parameters of particle discrete element was used as independent variable,the data which was measured by simulation model was used as evaluation index,and then curve fitting equation was built by changing the independent variables to obtain the corresponding evaluation index value in the simulation model.Finally,the factors measured in the real test model were substituted into curve fitting equation as the simulation target values to obtain the discrete element simulation contact parameters of potato minituber.The simulation experiment was verified through repeated simulation experiments.The particle discrete element simulation target parameters were obtained as the particle-steel coefficient of restitution was 0.523,the particle-particle coefficient of restitution was 0.478,the particle-steel coefficient of static friction was 0.644,the particle-steel coefficient of rolling friction was 0.022 1,the particle-particle coefficient of static friction was 0.325 and the particle-particle coefficient of rolling friction was 0.030 0.The calibrated physical parameters of the potato minituber were simulated by EDEM.The result showed that the calibrated particle stacking angles and seed distribution were consistent with the real experimental conditions.Simultaneously,the result can provide theoretical basis for the design and optimization of potato minituber related sowing equipment.关键词
微型马铃薯/离散元/仿真参数/标定Key words
potato minituber/discrete element/simulation parameters/calibration分类
农业科技引用本文复制引用
刘文政,何进,李洪文,李学强,郑侃,魏忠彩..基于离散元的微型马铃薯仿真参数标定[J].农业机械学报,2018,49(5):125-135,142,12.基金项目
山东省泰山产业领军人才工程高效生态农业创新项目(LJNY201615)和教育部创新团队发展计划项目(IRT13039) （LJNY201615）
