摘要
滚磨光整加工中磨块颗粒介质内力链网络影响颗粒群的宏观行为,进而影响加工效果。本文建立水平振动式滚磨光整加工离散元模型,分析颗粒介质介观尺度力链网络动态演化机制与宏观运动行为的联系,并对力链网络进行量化表征研究。结果表明:力链网络复杂的时空分布特性决定了颗粒群的运动特征,提高激振参数,颗粒介质出现流态化现象,力链数目减少,强力链长度变短、准直系数减小、强度提高、方向偏向重力方向。研究工作为形成滚磨光整加工多尺度研究策略提供了一定的分析方法。
In the process of mass finishing,the internal force chain network in media between masses affects the macroscopic behavior of granular matter,then affects the processing effect.In this paper,the numerical simulation model of horizontal vibration mass finishing is established to analyze the relationship between the dynamic evolution mechanism of mesoscopic force chain network and macroscopic motion behavior of granular media,and the quantitative characterization of force chain network is studied.The results show that the complex temporal and spatial distribution of force chain network determines the macroscopic motion behavior of granular matter.Increasing the excitation parameters,the fluidization appearance occurred in the granular media,the number of force chains decreases,the length and alignment coefficient of the strong chains decrease,but the strength increases,and the directivity tends to the gravity direction.The research provides an analytical method for forming the multi-scale research strategy of the mass finishing.
作者
张凯
李秀红
李文辉
王嘉明
李昊
ZHANG Kai;LI Xiuhong;LI Wenhui;WANG Jiaming;LI Hao(Taiyuan University of Technology,College of Mechanical and Vehicle Engineering,Taiyuan 030024,China;Taiyuan University of Technology,College of Aeronautics and Astronautics,Jinzhong 030600,Shanxi,China;Shanxi Key Laboratory of Precision Machining,Taiyuan 030024,China)
出处
《机械科学与技术》
CSCD
北大核心
2024年第4期628-636,共9页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金面上项目(51975399,51875389,52075362)。
关键词
水平振动滚磨
离散元法
颗粒物质
力链演化
量化表征
流态化
horizontal vibration mass finishing
DEM
granular matter
force chain evolution
quantitative characterization
fluidization
