This paper presents a method for the monitoring of the safety of rails against thermal buckling caused by temperature changes. The monitoring strategy is based on the measurement of couples of strains and temperatures by optic fibers. Measured strains and temperatures are observed and examined in order to elaborate an interpretative model to estimate neutral temperature and force eccentricity. The interpretative model is applied to real data showing the evolution of neutral temperature and rail eccentricity in a timespan of a couple of months. The values determined, at least as regards their variation, may provide an indication of the need for intervention when high values of eccentricity and excessive lowering of neutral temperature are observed.

Thermal buckling monitoring in continuous welded rails by means of temperature and strain measurements / Pau, Annamaria; Vestroni, Fabrizio; Duca, Elisa; Del Muto, Mauro; Platini, Massimo. - ELETTRONICO. - (2016), pp. 1-6. (Intervento presentato al convegno 11th World Congress on Railway Research tenutosi a Milano nel 29 May - 2 June 2016).

Thermal buckling monitoring in continuous welded rails by means of temperature and strain measurements

PAU, Annamaria;VESTRONI, Fabrizio;
2016

Abstract

This paper presents a method for the monitoring of the safety of rails against thermal buckling caused by temperature changes. The monitoring strategy is based on the measurement of couples of strains and temperatures by optic fibers. Measured strains and temperatures are observed and examined in order to elaborate an interpretative model to estimate neutral temperature and force eccentricity. The interpretative model is applied to real data showing the evolution of neutral temperature and rail eccentricity in a timespan of a couple of months. The values determined, at least as regards their variation, may provide an indication of the need for intervention when high values of eccentricity and excessive lowering of neutral temperature are observed.
2016
11th World Congress on Railway Research
thermal buckling; continuous welded rail
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Thermal buckling monitoring in continuous welded rails by means of temperature and strain measurements / Pau, Annamaria; Vestroni, Fabrizio; Duca, Elisa; Del Muto, Mauro; Platini, Massimo. - ELETTRONICO. - (2016), pp. 1-6. (Intervento presentato al convegno 11th World Congress on Railway Research tenutosi a Milano nel 29 May - 2 June 2016).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/863113
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