北京交通大学学报2016，Vol.40Issue(4)：37-44,8.DOI:10.11860/j.issn.1673-0291.2016.04.006
离散元-有限差分耦合法在铁路有砟道床研究中的应用
Application of coupled discrete element-finite difference method in railway ballast bed research
摘要
Abstract
The discrete element method (DEM)and finite difference method (FDM)coupling algo-rithm was introduced into mechanical analysis of railway ballast bed structure in this paper.The ballast bed model which consists of crushed stones was well performed based on DEM simulation of realistic appearance of ballasts by laser scanning.Both sleeper and roadbed foundation of suc-cessive medium were simulated based on FDM.Virtual coupling transition layer was established between interlayer structure boundaries.The DEM and FDM were dynamic coupled through ex-changing and iterating the physical parameters of forces and displacements between the two soft-wares within each time step.The sleeper-ballast bed-roadbed foundation system EDM-FDM cou-pling simulation model was established depending upon the improved method,which had been validated with the field measured results.关键词
有砟道床/离散元法/有限差分法/耦合算法Key words
ballast bed/discrete element method/finite difference method/coupling algorithm分类
交通工程引用本文复制引用
高亮,徐旸..离散元-有限差分耦合法在铁路有砟道床研究中的应用[J].北京交通大学学报,2016,40(4):37-44,8.基金项目
国家自然科学基金重点资助项目(U1234211) （U1234211）
国家自然科学基金面上资助项目(51578053,51578055) （51578053,51578055）
中央高校基本科研业务费专项资金资助(C15RC00120) （C15RC00120）
