ON SIIvIULATION OF OPERATION CONDITIONS OF RUNNING GEARS IN THE PERIOD OF DESIGN

Abstract

When designing new vehicles the reliable prediction of the future operation conditions of running gears based on quantitative statistics is very important both for the strength dimensioning and for ensuring the required riding comfort. This study introduces the analysis of the vertical dynamics of a vehicle under design, based on real-time simulation using the data of the traction and trailer units of the train and those of the railway line in question, especially the spectral density function of the vertical track irregularities. The combined numerical treatment of the train operation process and the vertical \'ehicle vibrations, as well as the predicted load statistics are illustrated for the running gear and suspension system of a four-axle bogie vehicle in suburban trattic.