Dynamic Analysis of High-Speed Railway Curves: Theory and Practice

The influence of curve parameter on the vehicle–track dynamic characteristics when the track obeys the law of ideal track geometry and the train goes through the curve at high speed has been analyzed earlier. The track geometry of a practical track is not an ideal alignment as there is random irregularity; the random irregularity of track is one of the main excitation of the vehicle–track dynamics. To study the law of influence of the technical condition of curve on the vehicle–track dynamic characteristics in the condition of practical track, according to the numerical simulation method of random irregularity of track, we did numerical simulation for the German high-speed low-disturbance line and the German high-speed high-disturbance line. Under the type of track structure and the random irregularity of track, the relationship between the wheel–rail interaction force and the curve radius was obtained.