Stability assessment of continuous welded railway with Vossloh fastenings using the finite element method

Abstract

This article presents a methodology for assessing the stability of continuous welded rail (CWR) track with Vossloh fastenings using the finite element method. The influence of longitudinal and transverse forces generated during train movement and braking on the condition of the rail string is analyzed. A finite element model is developed that accounts for sub-rail foundation deformations and the resistance of fastenings under various loading conditions. Particular attention is paid to the impact of geometric and operational factors such as track irregularities, rail defects, and wheelset wear. A Visual Basic macro was developed for the numerical evaluation of track stability loss. The results identify the most vulnerable zones of CWR track and define its critical operating conditions. Engineering recommendations are proposed for monitoring and mitigating deformation risks in high-traffic areas. The modeling outcomes may serve as a basis for updating regulatory requirements for the maintenance and operation of CWR track.