Critical Velocity obtained using Simplified Models of the Railway Track: Viability and Applicability

Zuzana Dimitrovová, DEC Group Author

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Increased demands on the capacity of the railway network gave rise to new issues related to the dynamic response of railway tracks subjected to moving vehicles. Thus, it becomes important to evaluate the applicability of traditionally used simplified models which have a closed form solution. Regarding simplified models, transversal vibrations of a beam on a visco-elastic foundation subjected to a moving load are considered. Governing equations are obtained by Hamilton’s principle. Shear distortion, rotary inertia and effect of axial force are accounted for. The load is introduced as a time varying force moving at a constant velocity. Transversal vibrations induced by the load are solved by the normal-mode analysis. Reflected waves at the extremities of the full beam are avoided by introduction of semi-infinite elements. Firstly, the critical velocity obtained from this model is compared with results of an undamped Euler-Bernoulli formulation with zero axial force. Secondly, a finite element model in ABAQUS is examined. The new contribution lies in the introduction of semi-infinite elements and in the first step to a systematic comparison, which have not been published so far.
Original languageUnknown
Title of host publicationnone
Pages36
Publication statusPublished - 1 Jan 2010
Event10th International Conference on Computational Structures Technology -
Duration: 1 Jan 2010 → …

Conference

Conference10th International Conference on Computational Structures Technology
Period1/01/10 → …

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