离散颗粒集合中的应力分布  

Stress distribution in disperse grain pack

作　　者：蒋红英[1] 鲁进步[2] 惠富春[3] 刘源[4] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]兰州理工大学技术工程学院,甘肃兰州730050 [3]兰州理工大学理学院,甘肃兰州730050 [4]兰州大学力学系,甘肃兰州730000

出　　处：《兰州理工大学学报》2004年第6期106-109,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(ZS022 A25 15)

摘　　要：以均匀立方体试块作为各向同性的、典型的颗粒介质单元集合,通过试验,分析在外部集中荷载作用下有序对称排列和非对称排列集合应力点分布的变化情况,研究离散颗粒介质的拱效应特征及非线性传递过程,并用Markov链的分枝过程描述应力传递的变化规律.　Taking a homogeneous cubic specimen as an isotropic pack composed of typical grained medium units,the variation pattern of stress point distribution in symmetric as well as asymmetric orderly disposed packs under an external concentrated load is analyzed with the help of experiment.The 'arch' effect and nonlinear transfer process of its disperse grained medium are investigated,and the variation pattern of stress transfer is described by using the ramified process of Markov links.

关 键 词：离散颗粒集合 分枝过程 应力点 

分 类 号：TU444[建筑科学—岩土工程]