Railways are experiencing a significant set of problems associated with dynamic interaction of the vehicle-track system. These problems mainly stem from existing wheel and track defects and they affect acoustic emissions, track maintenance and the reliability of the vehicle's rolling elements. In order to study these problems, models have been developed which make it possible to simulate the dynamic response of vehicle-track interaction. Only simple models, which consider the rail as a beam resting on an elastic foundation, have an analytical solution. This simplicity is lost when the rail is considered as having discrete supports and when nonlinearities are associated with the properties of ballast, railpads and wheel-rail contact. A method for simulation of the dynamic interaction between vehicle and railway track is proposed. The model has been designed to take into account the complexity of wheel-rail contact, railpad and ballast, with low computational requirements. A modal description of the rails and the sleepers is presented, imposing the coupling between these elements and the vehicle by means of the associated interaction forces. This provides a model with a reduced number of coordinates and therefore a low computational cost is achieved. It is shown that this model also enables to incorporate the associated nonlinear characteristics between the different elements by means of a simple formulation.
Railway vehicle/track interaction analysis using a modal substructuring approach
Analyse der Fahrzeug/Schiene Wechselwirkung bei Eisenbahnen mit einem modalen Substrukturansatz
Journal of Sound and Vibration ; 293 , 1/2 ; 112-124
2006
13 Seiten, 13 Bilder, 1 Tabelle, 21 Quellen
Article (Journal)
English
A railway track dynamics model based on modal substructuring and a cyclic boundary condition
Online Contents | 2011
|British Library Conference Proceedings | 2017
|Using Modal Substructuring to Improve Shock & Vibration Qualification
British Library Conference Proceedings | 2018
|Modal Substructuring of Geometrically Nonlinear Finite-Element Models
Online Contents | 2016
|