Development of a numerical model of railway air brake and validation against ‎experimental data

Stefano Melzi, Angelo Grasso

Abstract


The paper presents a model for the pneumatic part of UIC air brake, aiming at the prediction of the dynamics of compressed air in main braking pipe and braking cylinders. A lumped parameter scheme, based on an equivalent electrical circuit, is used to model the main braking pipe; the proposed scheme allows venting the pipe from different positions. Pressure build-up in braking cylinders is determined by the dynamics of pressure drop in main braking pipe and by the crossing of pressure thresholds. Time histories of pressure drop in main braking pipe and pressure build-up in braking cylinders were compared with experimental data collected with an indoor test facility to tune some of the model parameters and to validate the model itself.


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References


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