Using modal analysis, the deflection of a beam subjected to an axial tensile force N and a moving vertical force P, has been determined. This solution was exploited in a study of deflection and wave propagation in the contact wire of a railway overhead catenary system. For moderate values of speed c of the moving force P (i.e., c less than half the lowest critical speed c crit) travelling waves reflect at the boundaries of the contact wire so that the waves meet and catch up with the moving force several times. In practice, when a pantograph (here modelled by the force P) touches the contact wire some distance from the end of the wire, waves are sent out both in the forward and backward direction, giving even more reflections and wave interactions with the contact force. These waves will add or subtract to the wire deflection at the point of force application. The stress in the wire due to bending is estimated and it appears to be moderate for the speeds investigated here (i.e., for c<0.5c crit). Close to the critical speed, however, bending stresses will be significant.


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    Titel :

    Moving force on an axially loaded beam—with applications to a railway overhead contact wire


    Beteiligte:
    Dahlberg, T. (Autor:in)

    Erschienen in:

    Vehicle System Dynamics ; 44 , 8 ; 631-644


    Erscheinungsdatum :

    2006-08-01


    Format / Umfang :

    14 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt





    Railway overhead contact lines

    Wittgenstein, M. | Engineering Index Backfile | 1957


    Single-wire railway overhead system

    Caine, P.M. / Scott, P.R. | Tema Archiv | 1969


    OVERHEAD WIRE UTILIZATION SYSTEM AND OVERHEAD WIRE MOVING DEVICE

    NAKAMURA KAZUMASA / HARAJIRI KATSUJI / SUYAMA KAZUO | Europäisches Patentamt | 2023

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