目的 颗粒的堆积高度反映了包装袋的填充密度,堆积高度越大,则填充密度越小;反之,填充密度越大.探究不同振动参数(振动时间、振动频率、振动幅度和振动方向)对颗粒堆积高度的影响规律,以提高包装袋的填充密度.方法 基于DEM(Discrete Element Method),利用EDEM数值模拟软件建立PET颗粒堆积模型,并通过Matlab图像处理技术与实验相结合验证模型的准确性;在此模型基础上,仿真模拟颗粒在静止和振动状态下的堆积行为.结论竖直方向的振动更能降低颗粒的堆积高度,增大填充密度;随着振动时间的延长,颗粒的堆积高度逐渐降低,随后趋于平稳,最大可降低约17.70％;随着振动频率的增加,颗粒的堆积高度显著降低,最大可降低约16.67％;随着振动幅度的减小,颗粒的堆积高度逐渐降低,最大可降低约18.59％.结果 通过改变振动皮带机的振动参数,可以有效提升包装袋的颗粒填充密度.
Effect of Vibration on Particle Accumulation Based on DEM
The stacking height of particles is indicative of the filling density of a packaging bag,where a higher stacking height corresponds to lower filling density and vice versa.The work aims to explore how different vibration parameters(vibration time,frequency,amplitude and direction)affect particle stacking height,so as to improve the filling density of the packaging bag.A PET particle accumulation model was established by EDEM numerical simulation software based on the Discrete Element Method(DEM).The accuracy of the model was validated through MATLAB image processing techniques and experimental verification.Simulations were conducted to assess particle accumulation behavior under both stationary and vibrating conditions.The vertical vibration effectively reduced particle stacking height and increased filling density.As vibration time increased,the stacking height decreased progressively and then stabilized,with a maximum reduction of about 17.70％.Increasing vibration frequency led to a significant decrease in stacking height,with a maximum reduction of approximately 16.67％.Reducing vibration amplitude resulted in a gradual decrease in stacking height,with a maximum reduction of around 18.59％.Thus,optimizing vibration parameters on the vibrating belt conveyor can significantly enhance the particle filling density in packaging bags.
particle stackingdiscrete element methodpackaging effectvibration parameterimage processingvibrating belt conveyor
万方数据
维普
