Application of coupled discrete element-finite difference method in railway ballast bed research
GAO Liang
XU Yang
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.
Keywords：ballast beddiscrete element methodfinite difference methodcoupling algorithm
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 37-44 )