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| 振动压实下不规则颗粒细观响应的离散元模拟 | |
| 引用本文： | 黄宝涛,张敏思,雍军.振动压实下不规则颗粒细观响应的离散元模拟[J].公路交通科技,2009,26(7). |
| 作者姓名： | 黄宝涛 张敏思 雍军 |
| 作者单位： | 1. 东南大学,交通学院,江苏,南京,210096;浙江工业大学,建筑工程学院,浙江,杭州,310014 2. 东北大学,资源与土木工程学院,辽宁,沈阳,110004 3. 中国石油大学,石油工程学院,山东,青岛,266555 |
| 基金项目： | 交通部西部交通建设科技项目 |
| 摘 要： | 为了揭示颗粒材料在振动压实中空间结构的演化过程,采用不规则颗粒及颗粒接触界面生成的二维算法子程序,在指定的级配类型范围内随机生成不规则颗粒体,分别赋予颗粒体和孔隙相应的材料参数,对振动压实作用下不规则颗粒体的细观响应进行了分析.数值模拟结果表明:在振动压实过程中,颗粒之间存在相对竖向位移和相对侧向位移.颗粒的侧向位移与竖向位移沿着轴对称线大体呈对称分布;颗粒空间结构的变化不仅表现为水平位移调整和竖向位移调整,而且还表现为旋转调整;发生较大转角的颗粒在试样中部的最大半径处,颗粒转角变化沿着主应力路径呈"涡"形分布;随着密实度的提高,颗粒长轴逐渐偏向与振动压实荷载垂直的方向. |
| 关 键 词： | 道路工程 颗粒材料 数值模拟 振动压实 位移 旋转 |
Numerical Simulation of Irregular Particle Micro-response under Vibrating Compressive Load by DEM |
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| HUANG Baotao,ZHANG Minsi,YONG Jun.Numerical Simulation of Irregular Particle Micro-response under Vibrating Compressive Load by DEM[J].Journal of Highway and Transportation Research and Development,2009,26(7). | |
| Authors: | HUANG Baotao ZHANG Minsi YONG Jun |
| Institution: | 1.School of Transportation;Southeast University;Nanjing Jiangsu 210096;China;2.School of Civil Engineering and Architecture;Zhejiang University of Technology;Hangzhou Zhejiang 310014;3.College of Resource and Civil Engineering;Northeastern University;Shenyang Liaoning 110004;4.School of Petroleum Engineering;China University of Petroleum;Qingdao Shandong 266555;China |
| Abstract: | In order to investigate the spatial structure evolutionary process of particle material submitted to a vibrating compressive load,a 2D generation algorithm of irregular particle generation and particle contact interface generation was adopted.Irregular particles were randomly generated in the designated categories with this algorithm,and the material parameters were endowed to irregular particle and pore space.The irregular micro-particles response was analyzed under vibrating compression.The numerical simu... |
| Keywords: | road engineering granular material numerical simulation vibrating compaction displacement revolution |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |