Discrete element method of improved performance of railway ballast bed using elastic sleeper
Discrete element method of improved performance of railway ballast bed using elastic sleeper作者机构：School of Civil Engineering Beijing Jiaotong University Beijing Key Laboratory for Railway Track Engineering (Beijing Jiaotong University)
出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)
年 卷 期：2015年第22卷第8期
页 面：3223-3231页
核心收录：
学科分类：08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程]
基 金：Project(U1234211)supported by the National Natural Science Foundation of China Project(2013G009-B)supported by China Railway Corporation
主 题：railway ballast bed discrete element method elastic sleeper breakage mechanical property
摘 要：With the development of high-speed and heavy-haul railway in China, problems like insufficient thickness of ballast bed and overlarge track stiffness are obvious. Ballast may break into small particles and their contact status will deteriorate under cyclic loading, resulting in ballast degradation. Discrete element method(DEM) was used to research improved performance of ballast bed using elastic sleeper. Clusters were generated by bonding spheres to model real ballasts, while broken bonds were utilized to distinguish breakage. Two kinds of ballast beds with elastic sleeper and conventional sleeper were established, respectively. After applying cyclic loading to the models, differences of mechanical properties between two models were analyzed by contrasting their dynamic behavior indexes, such as particle contact force, sleeper settlement, vibration velocity and acceleration, breakage characteristic. The results illustrate that compared with conventional sleeper, elastic sleeper increases sleeper settlement, while reduces ballast vibration and contact force between particles, which could depress ballast breakage.
维普期刊数据库
同方期刊数据库