成分无序颗粒体系中切向力的分布  

Tangential Force Distribution in Granular System with Composition Disorder

作　　者：张兴刚[1] 胡林[1] 

机构地区：[1]贵州大学理学院,贵阳550025

出　　处：《计算物理》2012年第4期627-632,共6页Chinese Journal of Computational Physics

基　　金：贵州大学自然科学青年基金(2009011);贵州省自然科学基金(2011-2103);贵州省省长专项基金(2010-5)资助项目

摘　　要：采用离散元模拟研究成分无序颗粒体系中切向力的几率分布.将切向力分为主切向力和次切向力分别进行统计,结果表明主切向力与次切向力服从不同的分布.随着缺陷率的增加,主切向力由近似的正态分布变为双峰状的分布,最后变为单峰状的分布;而次切向力总是指数型分布.通过理论计算和模拟讨论了切向力分布,说明缺陷率较大的成分无序体系与结构无序体系有类似的力分布规律.Discrete element method is used to study probability distribution of tangential forces in granular system with composition disorder. Primary tangential force and secondary tangential force are distinguished and their statistics are analyzed separately. As the rate of defects increases, tangential force distribution transforms from approximate normal distribution to a distribution with two peaks. Finally it becomes a distribution with one peak. Whereas secondary tangential force distribution is always exponential. It shows that force distribution of composition disorder with great defect rate and structural disorder are similar.

关 键 词：颗粒物质 DEM模拟 无序体系 力分布 

分 类 号：O414.2[理学—理论物理]