细圆挂面接触物理参数测定与离散元仿真标定

Measurement of Contact Physical Parameters and Discrete Element Simulation Calibration of Fine Circular Dried Noodles

为了获得细圆挂面离散元仿真参数,提高细圆挂面在容积式称重计量仿真时的堆积密度。以细圆挂面为研究对象,通过查阅文献和物理实验得到挂面的相关参数,将物理实验和离散元仿真相结合,进行离散元参数标定。利用抽板实验得到16.2°的挂面物理堆积角,并以此为响应值,创建Plackett-Burman、最陡爬坡和Box-Behnken三种实验,对8个相关参数进行显著性筛选,最终筛选出3个影响显著的最佳参数值。最后对仿真堆积角的回归方程进行响应曲面最优求解。结果表明:对挂面堆积角影响显著的挂面-挂面恢复系数为0.2706,挂面-不锈钢恢复系数为0.3191,挂面-不锈钢滚动摩擦系数为0.0263。对得到的最优参数在EDEM中进行堆积角仿真,得到的挂面仿真堆积角与物理实验堆积角误差为1.1%。挂面接触物理参数试验与离散元仿真实验标定的参数可为后续细圆挂面容积式称重计量仿真提供参数支持。

In order to obtain the discrete element simulation parameters of the fine circular dried noodles,the packing density of fine circular dried noodles in volumetric weighing measurement simulation was improved.Thin circular dried noodles as the research object,the relevant parameters of the dried noodles were obtained by referring to literature and physical experiments.The discrete element parameters are calibrated by combining physical experiments with discrete element simulation.The physical stacking angle of the wall surface of 16.2°was obtained by the extraction plate experiment,and three experiments,plackett-burman,steepest climb and box-behnken,were created based on this as the response value.The significance of the eight relevant parameters was screened,and finally the three best parameter values with significant influence were selected.Finally,the response surface of the simulated pile angle regression equation is solved optimally.Results The simulation results showed that.The recovery coefficient of dried noodles-dried noodles is 0.2706,the recovery coefficient of dried noodles-stainless steel is 0.3191,and the rolling friction coefficient of dried noodles-stainless steel is 0.0263.The optimal parameters are simulated by stacking angle in EDEM,and the error between the simulation stacking angle of the dried noodles and the physical experiment stacking angle was 1.1%.The calibration parameters of wall contact physical parameter test and discrete element simulation experiment can provide parameter support for the subsequent simulation of fine circular dried noodles volumetric weighing measurement.