基于离散元法的同步碎石封层车碎石撒布器抗离析研究  

Anti-segregation Research of Macadam Spreading for Synchronous Chip Sealers Based on DEM

作　　者：赵勇 朱振东 郭磊 钟飞 

机构地区：[1]徐工集团工程机械股份有限公司

出　　处：《工程机械》2017年第3期14-18,共5页Construction Machinery and Equipment

摘　　要：为降低同步碎石封层车碎石撒布过程中产生的横向离析,基于离散单元法在离散元分析软件EDEM中建立碎石撒布器的仿真计算模型。采用正交试验设计,仿真研究螺旋布料器的结构参数(如螺距、螺旋直径)和运动学参数(如螺旋转速)的变化对碎石撒布离析程度的影响,并以离析指数作为评价指标和优化目标对螺旋布料器的结构参数和运动学参数进行优化设计。研究结果表明:螺旋转速和螺旋深度是影响横向离析的主要因素,通过降低螺旋转速并使物料满埋螺旋可有效降低离析程度。A simulation calculator model has been constructed within a discrete EDEM as based on a discrete element method,in order to minimize cross separation during gravel spread by the sync finish spreader.The designed test adopts a direct-cross way to carry out simulated studies to see how variation in assembly data(such as thread pitch,screw diameter,etc) of the spreader with the kinematics data(such as screw RPM)influences on separations of the gravel spreader,before carrying out an optimal design there-for,where the separation index is used as an assess indicator and optimization target to do an optimal design with assembly data and kinetic data thereof.The results show that the screw's RPM and depth are main factors which influences the cross separation,and therefore lower screw RPM and fuller aggregate burying the screw can effectively decrease separation degrees.

关 键 词：螺旋布料器 离散单元法:抗离析 正交试验 

分 类 号：U415.52[交通运输工程—道路与铁道工程]