On the efficiency of mitigation measures in reducing the amplified response at transition zones in railway tracks: tuned mass dampers, auxiliary rails, and under-sleeper pads

In transition zones, railway tracks experience significant inhomogeneity in their mechanical properties—more specifically in vertical stiffness. In such areas, conventional tracks (soft tracks) are typically encountered with other engineering structures with noticeably larger stiffness, such as bridges and culverts (stiff tracks). This...

Transition radiation in a nonlinear and infinite one-dimensional structure: a comparison of solution methods

Transition zones in railway tracks are locations with a significant variation of track properties (i.e. foundation stiffness) encountered near structures such as bridges and tunnels. Due to strong amplification of the track’s response, transition zones are prone to rapid degradation. To investigate the degradation mechanisms in transition...

Transition radiation in an infinite one-dimensional structure interacting with a moving oscillator—the Green's function method

Transition zones in railway tracks are areas with considerable variation of track properties (e.g., foundation stiffness) which may cause strong amplification of the response, leading to rapid degradation of the track geometry. Two possible indicators of degradation in the supporting structure are identified, namely the wheel-rail contact...

Transition radiation in a piecewise-linear and infinite one-dimensional structure–a Laplace transform method

Transition zones in railway tracks are areas with considerable variation of track properties (i.e., foundation stiffness) encountered near structures such as bridges and tunnels. Due to strong amplification of the response, transition zones require frequent maintenance. To better understand the underlying degradation mechanisms, a one...

Response of an Infinite Beam on a Locally Inhomogeneous and Non-linear Winkler Foundation Excited by a Constant Moving Load

Transition radiation is emitted when a source moves along a straight line with constant velocity and acts on or near an inhomogeneous medium [1,2]. Transition radiation occurs, for example, when a train crosses an inhomogeneity in the railway track, such as a transition in foundation stiffness. As the velocity of the trains becomes closer to the...

Transition radiation in an infinite beam supported by a locally inhomogeneous and non-linear Winkler foundation