Adaptation of passenger car suspension parameters to independiently rotating wheels

This study aimed to adjust the rail passenger car running gear parameters by
adapting them to independently rotating wheels. The most important aspect was the safety
of the passenger car running in terms of derailment; thus, the values of the Nadal criterion
were calculated first. Another aspect to consider is passenger comfort based on the values
of Sperling’s comfort index according to the rail passenger car speed. The modes of
suspension behaviour during operation were considered in two typical conditions: on a
straight track section and on a curve with a 200-m radius. Calculations were performed
using Universal Mechanism software. The results are interpreted in the paper, and the final
conclusions of this study are given