文献类型：期刊文献

中文题名：基于离散元的竹粉颗粒接触参数标定

英文题名：Calibration of contact parameters for bamboo powder particles based on DEM

作者：刘东[1] 刘子昕[1] 王琦[1] 李晓旭[1] 闫承琳[1,2]

第一作者：刘东

机构：[1]中国林业科学研究院木材工业研究所,北京100091;[2]中国林业科学研究院生态保护与修复研究所,北京100091

年份：2023

卷号：40

期号：4

起止页码：875-882

中文期刊名：浙江农林大学学报

外文期刊名：Journal of Zhejiang A&F University

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：中央级公益性科研院所基本科研业务费专项资金(CAFYBB2020SY040)。

语种：中文

中文关键词：参数标定;竹粉堆积角;离散元模拟;实验设计

外文关键词：parameters calibration;bamboo powder stacking angle;DEM simulation;design of experiment

分类号：S781.9

摘要：【目的】建立竹粉颗粒材料的离散元模型并标定其相关接触参数。【方法】基于毛竹Phyllostachys edulis粉末物理堆积角实验结果,采用离散元法(DEM)模拟仿真和实验设计(DOE)相结合的方法,通过Plackett-Burman (P-BD)实验、爬坡实验和响应面实验获得竹粉堆积角和仿真参数之间的二次多项式回归模型,以物理堆积角为目标值预测得到接触参数的最优组合。【结果】实测竹粉物理堆积角为49.29°;P-BD实验结果表明了竹粉-竹粉滚动摩擦系数、竹粉-竹粉恢复系数和竹粉-不锈钢板静摩擦系数对堆积角影响显著(P<0.05);响应面实验结果进一步证实了P-BD实验的结果,同时表明竹粉-竹粉滚动摩擦系数自身交互作用、竹粉-竹粉滚动摩擦系数和竹粉-竹粉恢复系数的交互作用对堆积角有显著影响(P<0.05);最优因素组合为竹粉-竹粉恢复系数0.44,竹粉-竹粉滚动摩擦系数0.22,竹粉-不锈钢板静摩擦系数0.45。【结论】本研究在41.20°~55.27°堆积角范围内建立的竹粉颗粒堆积角定量模拟标定与预测平台具有较高的可靠性,DEM标定方法可为后续建立评估生物质颗粒运动行为及其与设备相互作用的材料模型提供参考。
[Objective]This study,with the establishment of the discrete element model of bamboo powder particles and the calibration of its related contact parameters,is aimed to provide a fundamental basis for the research of the interaction mechanism between biomass material particles and processing equipment.[Method]First,a physical test was conducted of the contact parameters with its results used as the basis for the selection of simulation parameters.Then,with the method of discrete element method(DEM)simulation combined with design of experiment(DOE)test,the quadratic polynomial regression model between the stacking angle and DEM parameters was obtained by Plackett-Burman(P-BD)test,climbing test and response surface test.At last,The optimal combination of contact parameters was obtained by using the physical stacking angle as the target value.[Result]The measured physical stacking angle was 49.29°.The rolling friction coefficient of bamboo powder-bamboo powder,the restitution coefficient of bamboo powder-bamboo powder and the static friction coefficient of bamboo powder-stainless steel plate had significant effects on the stacking angle as was shown in the P-BD test(P<0.05).The response surface test further confirmed the results of P-BD test,and showed that the interaction between the rolling friction coefficient of bamboo powder-bamboo powder had significant effects on the stacking angle.It was proved that the interaction between the rolling friction coefficient of bamboo powder-bamboo powder and the restitution coefficient of bamboo powder-bamboo powder had significant effects on the stacking angle(P<0.05).The optimal combination was obtained with the restitution coefficient of bamboo powder-bamboo powder being 0.44,the rolling friction coefficient of bamboo powder-bamboo powder being 0.22 and the static friction coefficient of bamboo powder-stainless steel plate being 0.45.[Conclusion]The quantitative simulation calibration and prediction platform of bamboo powder particle stacking angle is of high reliability in the range of 41.20°?55.27°and the DEM calibration method employed in this study is conducive to the subsequent establishment of material models to evaluate the motion behavior of lignocellulosic biomass pellet and their interaction with equipment.