VIBRATION ANALYSIS OF HIGH SPEED RAILWAY TRACK STRUCTURE

Abstract

In this study, the vibration characteristics of high speed railway track are analyzed and to discover the correlation between anti-vibration slab mat mechanical characteristics and vibration isolation performance. When the train accelerates on the track, the train movement and static load propagate together, thus transforming the static load to a dynamic load. This transformation is caused by imbalance in between the rail surface and wheel. Anti-vibration slab mat is located among the concrete layers of slab track. High-speed railway track analysis, modeling of different track modal is carried out in SOLIDWORKS 18 and simulation in ANSYS18.1. To study the vibration of high speed railway track, two type of railway track modal considered for simulation, track structure with slab mat layer and without slab mat layer. Various modal parameters of the mat layer of slab such as stiffness, material and d amping ratio are examined to show the effects acceleration response reduction of h igh speed railway track structure. Modal analysis and harmonic response analysis a re needed in ANSYS 18.1 for simulation.Modal analysis is performed to determine the natural frequency and corresponding mode prior to the harmonic response analysis. The acceleration of high speed railway track is reduced when slab mat layer introduced between in railway track modal. Results indicate that neoprene with lower stiffness property works better for the same damping ratio then butyl rubber. When constant damping ratio of neoprene layer is raised, the response of vibration of high speed railway track reduces as compare to butyl rubber.