The Influence of an Integration Time Step on Dynamic Calculation of a Vehicle-Track-Bridge under High-Speed Railway

In order to study the influence of an integration time step on dynamic calculation a vehicle-track-bridge under high-speed railway, (VTB) coupled model is established. The accuracy and stability different speeds or track regularity states studied. irregularity further analyzed by using spectral characteristic sensitive wavelength. According results, disparity among effect VTB at very small. Higher speed requires smaller keep results stable. maximum vertical acceleration each component somewhat different, mechanism system that corresponding displacement different. deviation car body, wheel-sets bridge short wave state are greatly increased compared with without irregularity. wheel-sets, rails, slabs all show significant declining trend. larger vibration frequency is, range for calculation.