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An axially stressed railroad track on an elastic continuum subjected to a moving load

Achsial vorgespannte Eisenbahngeleise auf einem elastischen Halbraum unter bewegter Last

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Summary

The recent introduction of the welded railroad track raises the possibility that high axial compressive forces may occur in the rails due to constrained thermal expansions. This in turn may reduce the critical velocity of the track to within the operational velocities of present day trains. Recently the effect of axial forces upon the critical velocities of the track was analyzed byA. D. Kerr using the Winkler model for the base response. In this study, the effect of the axial compressive force on the critical velocity of the track is studied assuming for the base an elastic half space with inertia.

Zusammenfassung

Die Verwendung geschweißter Schienen begünstigt das Auftreten großer achsialer Druckkräfte in den Schienen zufolge behinderter Wärmedehnung. Dadurch kann die kritische Geschwindigkeit der Geleise bis zu den derzeitigen Betriebsgeschwindigkeiten der Züge erniedrigt werden. Vor kurzem wurde der Einfluß der Achsialkräfte auf die kritische Geschwindigkeit unter Verwendung des Winklerschen Modells für das Baukörperverhalten vonA. D. Kerr untersucht. In dieser Arbeit wird dieser Einfluß unter der Annahme einer Lagerung der Schienen auf einem elastischen Hohlraum betrachtet.

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Authors and Affiliations

  1. ENSCO, Inc., 22151, Springfield, VA, U.S.A.

    J. J. Labra

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  1. J. J. Labra
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With 5 Figures

Research partially supported by U.S. Department of Transportation grant. DOT-Fr-20064, based on part of Ph. D. dissertation submitted to New York University.

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Labra, J.J. An axially stressed railroad track on an elastic continuum subjected to a moving load. Acta Mechanica 22, 113–129 (1975). https://doi.org/10.1007/BF01170621

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  • DOI: https://doi.org/10.1007/BF01170621

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