FE-BASED SIMULATION METHOD ON WHEEL-TRACK VIBRATION OF JOINTED RAILWAY TRACK WITH GRID-TYPE SLEEPERS

Abstract

We investigate the influence of the vibration models of the grid-type sleepers on the simulated dynamic response of a jointed railway track. The grid-type sleepers are modeled as either non-prismatic Euler beams or 3-D elastodynamic bodies, and are continuously supported by Winkler-type elastic foundation or an elastodynamic layer. Two rails are connected by a supported joint or a suspended joint. Through numerical tests, the dynamic response of the railpad force and the sleeper acceleration show a similar tendency independently of vibration model of grid type-sleeper. The peak values at the impact and their post-peak behaviour are influenced by a choice of vibration model of the grid-type sleepers.