水平振动式滚磨光整加工中力链演化及量化分析
Evolution and Quantitative Analysis of Force Chain in Process of Horizontal Vibration Mass Finishing
张凯 1李秀红 1李文辉 2王嘉明 1李昊1
作者信息
- 1. 太原理工大学 机械与运载工程学院,太原 030024;精密加工山西省重点实验室,太原 030024
- 2. 太原理工大学 航空航天学院,山西晋中 030600;精密加工山西省重点实验室,太原 030024
- 折叠
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.
Abstract
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.
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Key words
horizontal vibration mass finishing/DEM/granular matter/force chain evolution/quantitative characterization/fluidization引用本文复制引用
基金项目
国家自然科学基金面上项目(51975399)
国家自然科学基金面上项目(51875389)
国家自然科学基金面上项目(52075362)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据