Nonlinear vibration and comfort analysis of high-speed trains moving over railway bridges


Kargarnovin, M.H., Younesian, D., Thompson, D.J. and Jones, C.J.C. (2004) Nonlinear vibration and comfort analysis of high-speed trains moving over railway bridges. In, Proceedings of the 7th Biennial Conference on Engineering Systems Design and Analysis. 7th Biennial Conference on Engineering Systems Design and Analysis (ESDA 2004) New York, USA, Amercan Society of Mechanical Engineers.

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Description/Abstract

The ride comfort of high-speed trains passing over railway bridges is studied in this paper. The effects of some nonlinear parameters in a carriage-track-bridge system are investigated such as the load-stiffening characteristics of the rail-pad and the ballast, rubber elements in the primary and secondary suspensions systems. The influence of the track irregularity and train speed on two comfort indicators, namely Sperling's comfort index and the maximum acceleration level, are also studied. Timoshenko beam theory is used for modelling the rail and bridge and two layers of parallel damped springs in conjunction with a layer of mass are used to model the rail-pads, sleepers and ballast. A randomly irregular vertical track profile is modelled, characterised by a power spectral density (PSD). The 'roughness' is generated for three classes of tracks. Nonlinear Hertz theory is used for modelling the wheel-rail contact.

Item Type: Book Section
Related URLs:
Keywords: comfort analysis, high-speed train, bridge, non-linear vibration
Subjects: T Technology > TG Bridge engineering
T Technology > TF Railroad engineering and operation
Divisions: University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Dynamics
ePrint ID: 28139
Date Deposited: 04 May 2006
Last Modified: 27 Mar 2014 18:16
URI: http://eprints.soton.ac.uk/id/eprint/28139

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