A numerical program for Railway vehicle-track-structure dynamic interaction using a modal substructuring approach

Savini, Gabriel (2011) A numerical program for Railway vehicle-track-structure dynamic interaction using a modal substructuring approach. [Laurea specialistica], Università di Bologna, Corso di Studio in Ingegneria meccanica [LS-DM509]
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Abstract

This work presents a program for simulations of vehicle-track and vehicle-trackstructure dynamic interaction . The method used is computationally efficient in the sense that a reduced number of coordinates is sufficient and doesn’t require high efficiency computers. The method proposes a modal substructuring approach of the system by modelling rails , sleepers and underlying structure with modal coordinates, the vehicle with physical lumped elements coordinates and by introducing interconnection elements between these structures (wheel-rail contact, railpads and ballast) by means of their interaction forces. The Frequency response function (FRF) is also calculated for both cases of track over a structure (a bridge, a viaduct ...) and for the simple vehicle-track program; for each case the vehicle effect on the FRF is then analyzed through the comparison of the FRFs obtained introducing or not a simplified vehicle on the system.

Abstract
Tipologia del documento
Tesi di laurea (Laurea specialistica)
Autore della tesi
Savini, Gabriel
Relatore della tesi
Correlatore della tesi
Naldi, Giovanni
Scuola
Corso di studio
Ordinamento Cds
DM509
Parole chiave
rail-track modal analysis substructuring interaction approach vehicle-track-structure vibration
Data di discussione della Tesi
15 Marzo 2011
URI

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