A numerical model to predict train-induced vibrations is presented. The dynamic computation considersmutual interactions in vehicle/track coupled systems by means of a finite and discrete elementsmethod. The rail defects and the case of out-of-round wheels are considered. The dynamic interactionbetween the wheel-sets and the rail is accomplished by using the non-linear Hertzian model withhysteresis damping. A sensitivity analysis is done to evaluate the variables affecting more the maintenancecosts. The rail–sleeper contact is assumed extended to an area-defined contact zone, ratherthan a single-point assumption which fits better real case studies. Experimental validations show howprediction fits well experimental data.

A contact-area model for rail-pads connections in 2-D simulations: sensitivity analysis of train induced vibrations

LEONARDI, Giovanni;
2013

Abstract

A numerical model to predict train-induced vibrations is presented. The dynamic computation considersmutual interactions in vehicle/track coupled systems by means of a finite and discrete elementsmethod. The rail defects and the case of out-of-round wheels are considered. The dynamic interactionbetween the wheel-sets and the rail is accomplished by using the non-linear Hertzian model withhysteresis damping. A sensitivity analysis is done to evaluate the variables affecting more the maintenancecosts. The rail–sleeper contact is assumed extended to an area-defined contact zone, ratherthan a single-point assumption which fits better real case studies. Experimental validations show howprediction fits well experimental data.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12318/6101
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