Dynamic analysis for high-speed train hollow power axle

Abstract

This study was carried out to find the forces acting on a Siemens Velaro D type high-speed train hollow power axle commissioned by Turkiye Cumhuriyeti Devlet Demiryollar (TCDD) to examine the dynamic loads created by these forces and to understand whether these shafts are safe in terms of continued strength. Track shift forces were found for the high-speed train, and according to these forces the net axle force ratio (L/V) was calculated depending on the speed increase. These data were compared with the experimental results of the Federal Railroad Administration (American FRA) and German Railways. In this study, after determining the compatibility of the calculated results with the experimental data, various analyses such as different road conditions, load on the axle for full vehicles, variation of vertical load, dynamic factor, safety factor and continuous strength calculation for the most dangerous section were carried out. Considering these analyses, while the static load is 148 kN in the vehicle loaded condition, this load increases to 153 kN in the vehicle loaded condition and at a speed of 70 m/s. For this reason, it would be wrong to use the static load created by the weight of the vehicle alone in the classical continuous strength calculation. The dynamic load created by the vehicle travel speed must be added to the calculations.