Track stiffness and the vertical track geometry deterioration modeling

Abstract

Railway track stiffness is a basic parameter of track design which influences the bearing capacity, the dynamic behavior of passing vehicles, track geometry quality and the life of track components. In this paper track stiffness is treated from the point of view of the vertical track geometry deterioration modeling. In most of the models, the vertical geometry deterioration is considered to be a function of the number of loading cycles and/or a function of the magnitude of the loading. Deterioration should also be a function of the properties of the track superstructure and substructure, so, the track stiffness should be an indispensable part of those models. The aim of this study is to analyze the vertical track stiffness and its influence on geometry deterioration, and to make a comparative analysis between deterioration models that directly or indirectly include the effect of the vertical track stiffness.

Krutost šinske podloge je osnovni parametar konstrukcije gornjeg i donjeg stroja železničke pruge koji utiče na nosivost, dinamičko ponašanje vozila, kvalitet geometrije koloseka i vek trajanja elemenata konstrukcije. U radu se krutost šinske podloge razmatra sa aspekta modeliranja propadanja vertikalne geometrije koloseka. U većini modela, propadanje vertikalne geometrije koloseka je funkcija broja ciklusa opterećenja i/ili funkcija intenziteta opterećenja. Pored toga, propadanje je funkcija karakteristika konstrukcije gornjeg i donjeg stroja, tako da krutost šinske podloge treba da bude neizostavni deo tih modela. Cilj istraživanja je analiza krutosti šinske podloge i njenog uticaja na propadanje geometrije, kao i komparativna analiza modela propadanja koji na direktan ili indirektan način uključuju uticaj vertikalne krutosti.