测量不规则块体界面摩擦角的滚筒实验  

Rotating Drum Experimental Research on Meacurement of Interface Friction Angle between Irregular Block and Its Base

作　　者：汪远 邓检良[1] 黄凤荣 WANG Yuan;DENG Jianliang;HUANG Fengrong(School of Naval Architecture,Ocean,and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;SGIDI Engineering Consulting(Group)Co.,Ltd.,Shanghai 200093,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]上海勘察设计研究院(集团)有限公司,上海200093

出　　处：《实验室研究与探索》2021年第7期10-15,共6页Research and Exploration In Laboratory

基　　金：国家重点研发计划项目(2016YFC0401908)。

摘　　要：为实测不规则块体与底部界面之间的界面摩擦角,采用滚筒实验方法获取了石英石块体界面摩擦角的近千个实测数据。根据统计学原理,分析了石英石块体质量、形状、块体和筒底的相对运动速度3个因素对平均界面摩擦角的影响。结果表明,质量和形状的影响不明显;相对运动速度的影响显著。采用开源离散元软件LIGGGHTS验证了实测的平均界面摩擦角可用于数值计算,揭示了数值计算在模拟滚筒实验中振荡现象的局限性。研究结果揭示了不规则块体与底部界面之间的界面摩擦角的统计学规律,证实了滚筒实验对于测定界面摩擦角的有效性,证明了滚筒实验结果可用于标定DEM数值计算的滑动摩擦系数。In order to measure the interface friction angle,rotating drum experiments were conducted by nearly one thousand measurements of interface friction angle.Based on the principle of statistics,three influencing factors,i.e.,the mass,shape and relative velocity between the block and its base,of the averaged interface friction angle were evaluated.The results show that the influences of mass and shape are not significant,while the relative velocity is significant.Subsequently,the open source discrete element software LIGGGHTS verifies that the measured averaged interface friction angle can be used in numerical calculations,in spite that the numerical calculations was not able to simulate the oscillation phenomenon in the rotating drum experiment.This research reveals the statistical properties of the interface friction angle between the irregular block and its base,validates the rotating drum experiment in determining the interface friction angle and confirms the application of the experimentally measured interface friction angle in the DEM numerical calculation.

关 键 词：不规则块体 滚筒实验 界面摩擦角 振荡 

分 类 号：P642.3[天文地球—工程地质学]