棒在颗粒物质中穿行时摩擦振荡行为的研究  

The oscillatory friction of rod in the sliding course of granular materials

作　　者：吴宇[1] 胡林[1] 曲东升[1] 汤燕[1] 张忠政[1] 杜学能[2] 许锋[1] 

机构地区：[1]贵州大学理学院贵州省光电子技术与应用重点实验室,贵州贵阳550025 [2]铜仁学院物理系,贵州铜仁554300

出　　处：《山东大学学报（理学版）》2007年第5期34-37,54,共5页Journal of Shandong University(Natural Science)

基　　金：国家自然科学基金资助项目(10374021);贵州省高层次人才基金资助项目(20061228);贵州省省长基金资助项目(20061108)

摘　　要：实验发现,棒在颗粒物质中运动时滑动摩擦力具有准周期振荡性质.根据颗粒物质的剪胀性对此现象进行了研究,提出相应的物理模型,建立了平均体积分数振荡方程和滑动摩擦力振荡变化关系式,理论计算分析结果与实验结果基本吻合.It is found that sliding friction between continuous medium and granular materials has a novel speciality of quasi-periods oscillatory. According to the shearing dilatancy of granular materials, this novel phenomenon is studied. Aphysical model i, proposed to explain the experimental results and presents an equation about average density oscillating in the effective region. It addition, a function about sliding friction is elicited. The theoretical results accord well with the experimental results.

关 键 词：滑动摩擦力 剪胀性 有效区域 平均体积分数 

分 类 号：U213.1[交通运输工程—道路与铁道工程]