Railway track dynamics with periodically varying stiffness and damping in the Winkler foundation

railway track stiffness variations – consequences and countermeasures

the track stiffness experienced by a train will vary along the track. sometimes the stiffness variation may be very large within a short distance. one example is when an unsupported sleeper is hanging in the rail. track stiffness is then, locally at that sleeper, very low. at insulated joints the bending stiffness of the rail has a discontinuity implying a discontinuity also of the track stiffn...

Railway Track Stiffness - Dynamic Measurements and Evaluation for Efficient Maintenance

v Outline of Thesis vii Author contribution of papers ix Contribution of Thesis xi

Dynamics of the pendulum with periodically varying length

Development of a Finite Element Methodology for Flexible Track Models in Railway Dynamics Applications

The dynamic analysis of railway vehicles involves the construction of three independent models: the vehicle model; the track model; and the wheel-rail contact model. In this work, a multibody formulation with Cartesian coordinates is used to describe the kinematic structure of the rigid bodies and joints that constitute the vehicle model. A methodology is also proposed in order to create detail...

THE MODEL UPDATING OF MASS, DAMPING AND STIFFNESS MATRICES