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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.

Tipologia del documento:Tesi di laurea (Laurea specialistica)
Autore:Savini, Gabriel
Relatore della tesi:Savoia, Marco
Scuola:Ingegneria e Architettura
Corso di studio:Ingegneria meccanica [LS-DM509]
Ordinamento Cds:DM509
Parole chiave:rail-track modal analysis substructuring interaction approach vehicle-track-structure vibration
Data di discussione della Tesi:15 Marzo 2011

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