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Optimization of dynamic vibration absorbers placed on the tunnel interior surface to mitigate underground railway-induced vibration
Noori, Beshshad; Cubría, Victor; Arcos Villamarín, Robert; Clot Razquin, Arnau; Romeu Garbí, Jordi
Universitat Politècnica de Catalunya. Departament d'Enginyeria Mecànica; Universitat Politècnica de Catalunya. LEAM - Laboratori d'Enginyeria Acústica i Mecànica
In the present study, dynamic vibration absorber (DVA) has been introduced as an innovative countermeasure in the field of railway-induced vibration. The Pipe-in-Pipe (PiP) model and Green's functions for a two-and-a-half dimensional (2.5D) elastodynamic problem in a full- and half-space have been employed to find the response of the tunnel embedded in a homogeneous half-space due to a harmonic load. DVAs have been coupled to the tunnel interior surface. The effectiveness of DVAs depends on the mass, damping ratio, natural frequency and their distribution. Therefore, an optimization algorithm has been developed to find the optimum parameters of the DVAs, which are those that minimize the vibration levels at the ground surface. Evaluating the efficiency of the optimal DVAs shows that they are an efficient countermeasure to mitigate underground railway-induced vibration.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica
Àrees temàtiques de la UPC::Enginyeria civil::Infraestructures i modelització dels transports::Infraestructures i transport ferroviari
Railroad tunnels
Damping (Mechanics)
Railway-induced vibration
Dynamic vibration absorber
Vibració -- Control
Amortiment (Mecànica)
Túnels ferroviaris
Sociedade Portuguesa de Acústica

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