This paper deals with the time-frequency characteristic analysis for track geometry irregularities using field data recorded by a comprehensive inspection train. The parameters of gauge and left right rail alignment are considered to identify their wavelengths locations waveforms. In addition conventional time frequency domain analysis, auto-adaptive signal decomposition techniques used on four...

Inadequate track drainage can lead to a variety of issues, including flooding, accelerated degradation, and progressive or sudden failure railway track, slope, embankment. These result in unplanned maintenance, additional passenger travel costs, damage third party property. However, asset management is challenging because it involves the consideration large interconnected assets, limited mainte...

One of the most important factors influencing the track maintenance is the transitions between parts of the track with different vertical stiffness. The dynamic...

A proper understanding of the mechanical behaviour substructure layers is crucial for optimising design and performance a ballasted railway track. The recent advent high-speed trains heavy haul freight wagons has heightened this need more than ever. accurate prediction long-term tracks under increased speed loads still remains an intriguing challenge researchers engineers. In context, present p...

Scrap tyres are used to produce tyre-derived aggregates (TDA), which can be as fill material, backfill drainage layers, and vibration-damping among other uses. This study presents a comprehensive review of TDA applications in civil engineering with specific focus on railway projects. A the existing literature reveals lack sufficient knowledge use slab tracks. article also analyses adequacy diff...

Laying ballastless track on railway bridges has the advantages of reducing the train noise problem, improving passenger comfort, and reducing track maintenance costs. Therefore, railway bridges with ballastless track have gradually turned into a major trend in railway systems all over the world. In Taiwan, railway bridges with ballastless track have been in use for many years, with ballastless ...

nonlinear hunting speeds of railway vehicles running on a tangent track are analytically obtained using hopf bifurcation theory in this paper. the railway vehicle model consists of nonlinear primary yaw dampers, nonlinear flange contact stiffness as well as the clearance between the wheel flange and rail tread. linear and nonlinear critical speeds are obtained using bogoliubov method. a compreh...