BazEkon - The Main Library of the Cracow University of Economics

Author
Rydygier Edward (Kazimierz Pułaski University of Technology and Humanities in Radom, Poland), Strzyżakowski Zygmunt (Municipal Office of Capital City of Warsaw)
Title
Modelling of Contact Problems Involved in Ensuring the Safety of Rail Transport
Udział modelowania zagadnień kontaktowych w zapewnieniu bezpieczeństwa transportu szynowego
Source
LogForum, 2013, vol. 9, nr 4, s. 231-238, rys., bibliogr. 13 poz.
Keyword
Transport, Modelowanie matematyczne, Transport kolejowy
Transport, Mathematical modeling, Railway transport
Note
summ., streszcz., Zfsg.
Abstract

ABSTRACT. Background: Mathematical modelling aids diagnostics the track and rolling stock, as it often for technical reasons it is not possible to obtain a complete set of measurement data required to diagnose the rail and wheel deformation caused by the impact of a rail vehicle on the track. The important issue in a railway diagnostics is to study the effects of contact wheel and rail. Diagnostics investigations of track and rolling stock have a fundamental role in ensuring the safety of transport of passengers and goods. The aim of the study presented in the paper was to develop simulation methods of mathematical modelling of the wheelrail system useful in the diagnostics of the track and a railway vehicle. Methods: In the paper two ways of modelling were presented and discussed. One of these ways is the method which consists in reducing the contact issue to field issue and solving the identification of the field source in 2-D system. Also presented a different method designed on the basis of the methods using one period energy concept. This method is adapted for modelling the dynamics of the contact wheel-rail for the normal force. It has been shown that the developed modelling methods to effectively support the study on the effects of mechanical and thermal of contact wheel-rail and contribute to the safety of operations. Results and conclusions: In the case of field sources identifications two specific issues were examined: the issue of rail torsion and the identification of heat sources in the rail due to exposure the rolling contact wheel-rail. In the case of the method using one period energy concept it was demonstrated the usefulness of this method to the study of energy processes in the contact wheel-rail under the normal periodic force. The future direction of research is to establish cooperation with research teams entrusted with the diagnostic measurements of track and rolling stock. (original abstract)
Full text
Show
Bibliography
Show
1. Kisilowski J. (Ed.), 1991, Dynamika układu mechanicznego pojazd szynowy - tor [Dynamics of the mechanical system rail vehicle-track], Scientific Publisher PWN, Warsaw.
2. Potter D., 1980, Computational physics, Wiley, New York.
3. Rydygier E., Strzyżakowski Z., 2009, The Simulation Method used to solve engineering inverse problems, Argesim Report 35, 2704-2707, Ed. Vienna University of Technology.
4. Rydygier E., Strzyżakowski Z., 2009, Application of numerical methods of field sources identification to selected issues in rail vehicle-track system, Warsaw University of Technology Scietific Works, Transport, Z71, 196-205, Warsaw University of Technology Publishing House, Warsaw.
5. Rydygier E., Strzyżakowski Z., 2010, Efektywne metody modelowania użyteczne w eksploatacji pojazdów szynowych [Effective modelling methods used in exploitation rail vehicles], Logistyka [Logistics] 2/2010.
6. Rydygier E., Strzyżakowski Z., 2011, Modelowanie zagadnień w układzie pojazd szynowy - tor [Modelling issues in the rail vehicle-track system], Logistyka [Logistics] 3/2011.
7. Rydygier E., Strzyżakowski Z., 2012, Modelowanie problemów odwrotnych w diagnostyce toru kolejowego [Inverse problems modelling in diagnostics of the railway track], Logistyka [Logistics] 3/2012.
8. Rydygier E., Strzyżakowski Z., 2012, Metody modelowania układu koło - szyna kolejowa użyteczne w diagnostyce toru kolejowego [Modelling methods of the wheel-rail system useful in the diagnostics of railway track], Technika Transportu Szynowego [Railway Transport Technology] 9/2012.