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二维圆形颗粒堆积体中力的传递规律研究

发表时间:2013-08-15  浏览量:1148  下载量:262
全部作者: 刘源,慕青松,缪馥星
作者单位: 兰州交通大学土木工程学院;兰州大学土木工程与力学学院
摘 要: 通过改变堆积形式、边界条件、荷载种类等方法,对力在由硬币组成的二维圆形颗粒堆积体内的传递规律进行详细的实验研究。发现:颗粒堆只受重力作用时,能形成稳定的“拱”结构,存在明显的“拱效应”;当在边界推力作用下时,不管堆积形状如何,随荷载形式的变化,堆积中形成由“正三角形”构成的不同形状的稳定不动部分,且力沿着这些三角形的2个侧边向下传递。分析比较实验结果,进一步从静力分析角度给出这些现象和规律的初步解释。
关 键 词: 物理力学;力的传递;实验;拱效应
Title: Study on force transmission in 2D disk granular arrays
Author: LIU Yuan, MU Qingsong, MIAO Fuxing
Organization: School of Civil Engineering, Lanzhou Jiaotong University; School of Civil Engineering and Mechanics, Lanzhou University
Abstract: The force transmission in some 2D granular arrays consisting of aluminium disks is investigated experimentally, under varying boundary conditions and external forces. The following phenomena are found: 1) Under gravitational force, the stable “arching structure” can be observed and the“arching effect” exists. 2) Under external forces, for every packing geometry, there are some no-displacement stable regions taking the different shapes of some equilateral triangles. In addition, some dimensional analyses on these results are presented and the basic static theory is employed to explain them.
Key words: physical mechanics; force transmission; experiment; arching effect
发表期数: 2013年8月第15期
引用格式: 刘源,慕青松,缪馥星. 二维圆形颗粒堆积体中力的传递规律研究[J]. 中国科技论文在线精品论文,2013,6(15):1443-1449.
 
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