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Dynamic train-turnout interaction in an extended frequency range using a detailed model of track dynamics
Chalmers University of Technology.
Chalmers University of technology. (Charmec)
2009 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 320, no 4-5, 893-914 p.Article in journal (Refereed) Published
Abstract [en]

A time domain solution method for general three-dimensional dynamic interaction of train and turnout (switch and crossing) that accounts for excitation in an extended frequency range (up to several hundred Hz) is proposed. Based on a finite element (FE) model of a standard turnout design, a complex-valued modal superposition of track dynamics is applied using the first 500 eigenmodes of the turnout model. The three-dimensional model includes the distribution of structural flexibility along the turnout, such as bending and torsion of rails and sleepers, and the variations in rail cross-section and sleeper length. Convergence of simulation results is studied while using an increasing number of eigenmodes. It is shown that modes with eigenfrequencies up to at least 200 Hz have a significant influence on the magnitudes of the wheel-rail contact forces. Results from using a simplified track model with a commercial computer program for low-frequency vehicle dynamics are compared with the results from using the detailed FE model in conjunction with the proposed method.

Place, publisher, year, edition, pages
2009. Vol. 320, no 4-5, 893-914 p.
National Category
Infrastructure Engineering
URN: urn:nbn:se:kth:diva-76122DOI: 10.1016/j.jsv.2008.08.028ISI: 000263851600012OAI: diva2:490871
Available from: 2012-02-14 Created: 2012-02-06 Last updated: 2012-02-14Bibliographically approved

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Gebretsadik, Elias Kassa
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