曹波,李文辉,王娜,白小云,王程伟.基于JKR模型的湿式滚抛磨块离散元参数标定[J].表面技术,2019,48(3):249-256.
CAO Bo,LI Wen-hui,WANG Na,BAI Xiao-yun,WANG Cheng-wei.Calibration of Discrete Element Parameters of the Wet Barrel Finishing Abrasive Based on JKR Model[J].Surface Technology,2019,48(3):249-256
基于JKR模型的湿式滚抛磨块离散元参数标定
Calibration of Discrete Element Parameters of the Wet Barrel Finishing Abrasive Based on JKR Model
投稿时间:2018-08-31  修订日期:2019-03-20
DOI:10.16490/j.cnki.issn.1001-3660.2019.03.034
中文关键词:  湿式滚抛磨块  JKR接触模型  参数标定  休止角  相对误差
英文关键词:wet barrel finishing abrasive  JKR contact model  parameter calibration  angle of repose  relative error
基金项目:国家自然科学基金(51875389,U1510118,51345010);山西省自然科学基金(201801D111002)
作者单位
曹波 太原理工大学 a.机械工程学院 b.精密加工山西省重点实验室,太原 030024 
李文辉 太原理工大学 a.机械工程学院 b.精密加工山西省重点实验室,太原 030024 
王娜 太原理工大学 a.机械工程学院 b.精密加工山西省重点实验室,太原 030024 
白小云 太原理工大学 a.机械工程学院 b.精密加工山西省重点实验室,太原 030024 
王程伟 太原理工大学 a.机械工程学院 b.精密加工山西省重点实验室,太原 030024 
AuthorInstitution
CAO Bo a.School of Mechanical Engineering, b.Shanxi Key Laboratory of Precision Machining, Taiyuan University of Technology, Taiyuan 030024, China 
LI Wen-hui a.School of Mechanical Engineering, b.Shanxi Key Laboratory of Precision Machining, Taiyuan University of Technology, Taiyuan 030024, China 
WANG Na a.School of Mechanical Engineering, b.Shanxi Key Laboratory of Precision Machining, Taiyuan University of Technology, Taiyuan 030024, China 
BAI Xiao-yun a.School of Mechanical Engineering, b.Shanxi Key Laboratory of Precision Machining, Taiyuan University of Technology, Taiyuan 030024, China 
WANG Cheng-wei a.School of Mechanical Engineering, b.Shanxi Key Laboratory of Precision Machining, Taiyuan University of Technology, Taiyuan 030024, China 
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中文摘要:
      目的 确定湿式滚抛磨块在接触过程中各相关物理性能参数的取值。方法 基于EDEM离散元仿真模拟,选取系统中“Hertz-Mindlin with JKR”接触模型,以休止角为评价指标,对湿式滚抛磨块离散元模拟的最优参数组合进行标定。首先运用Plackett-Burman试验选取对湿式滚抛磨块有显著影响的3个参数项(湿式滚抛磨块间的滚动摩擦系数、碰撞恢复系数和JKR表面能),然后用最陡爬坡试验确定出显著性参数的最优区间,最后通过响应曲面法(Box-Behnken)分别对休止角和相对误差与3个显著性参数的回归模型二次多项式进行方差分析,并寻找最优参数组合。结果 得到了最优参数组合解:磨块间滚动摩擦系数为0.0597,碰撞恢复系数为0.7444,JKR表面能为0.1 J/m2。运用最佳参数组合进行仿真分析,得到休止角的均值为27.17?,与实验的休止角相对误差为0.6%。结论 使用该方法进行湿式滚抛磨块离散元物理性能参数的标定具有可行性,不仅可以为实现仿真模拟的参数确定提供依据,同时可为其他非规则形状散体的参数测定提供参考。
英文摘要:
      The work aims to determine the values of the relevant physical performance parameters of the wet barrel finishing abrasive in contact process. Based on EDEM discrete element simulation, Hertz-Mindlin with JKR contact model was selected from the system, and the angle of rest was used as the evaluation index to calibrate the optimal combination of parameters in the discrete element simulation of wet barrel finishing abrasive. Firstly, three parameters (rolling friction coefficient, collision recovery coefficient and surface energy of JKR between the wet barrel finishing abrasives) were selected by Plackett-Burman test. Then the optimal range of the significant parameters was determined by the steepest climbing test. Finally, the response surface method, Box-Behnken test was used to analyze the variance of the quadratic polynomial of regression model with angle of the rest and relative error and three significant parameters and to find the optimal combination of parameters. The optimal combination of parameters was obtained: rolling friction coefficient of 0.0597, collision recovery coefficient of 0.7444 and JKR surface energy of 0.1 J/m2. The simulation analysis was performed by the optimal parameter combination. The average repose angle was 27.17°, and the relative error between the repose angle and the experiment was 0.6%. It is feasible to use this method to calibrate the discrete physical parameters of wet barrel finishing abrasive. It can not only provide a basis for parameter determination of the simulation, but also provide reference for parameter mensuration of other irregular shape granules.
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