楔形滑体运动特征数值模拟及分析  

Numerical simulation and analysis of motion characteristics of wedge slide

作　　者：汪鹏程[1] 杨扬[1] 方祥 徐巍 WANG Pengcheng;YANG Yang;FANG Xiang;XU Wei(School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院

出　　处：《合肥工业大学学报（自然科学版）》2019年第9期1244-1250,共7页Journal of Hefei University of Technology：Natural Science

摘　　要：文章将常见滑坡模型进行简化,把滑体的运动状态分为失稳启动后斜面运动阶段和水平运动阶段。通过FISH语言编写PFC3D颗粒流运行程序,模拟并分析了滑体从开始解体到运动停止堆积状态的整个运动过程。考察滑体在不同时刻的运动形态变化,记录了滑体内部颗粒接触数目与滑体能量随时间变化的规律。通过在相关特征部位设定监测点,获得滑体不同部位的总速度、纵向速度和纵向位置等运动特征参量。结果表明:滑体各部分运动状态受所处的初始位置影响很大;滑体颗粒不光有前后运动还有横向运动;滑体中不同能量变化差异较大。In this paper,the common landslide model was simplified,and the moving state of the sliding body was divided into the slope movement stage and the horizontal movement stage after instability started.PFC3D particle flow program was programmed by FISH language to simulate and analyze the whole movement of the slide from the start of disintegration to the stop of accumulation of movement.The movement of the slide at different times was investigated.The change of the number of particles in the slide and the energy of the slide were recorded.By setting the monitoring points in the relevant characteristic parts,the movement characteristic parameters such as the total speed,the longitudinal speed and the longitudinal position of the different parts of the sliding body were obtained.The conclusion is that the movement states of the parts of the body are greatly influenced by the initial position of the body.The particles of the body are not only anteroposterior and lateral but also different in energy.

关 键 词：楔形滑体 PFC3D颗粒流 运动过程 三维数值模拟 

分 类 号：TU457[建筑科学—岩土工程]