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DYNAMIC STIFFNESS OF A RAILWAY OVERHEAD WIRE SYSTEM AND ITS EFFECT ON PANTOGRAPH–CATENARY SYSTEM DYNAMICS

✍ Scribed by T.X. Wu; M.J. Brennan

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
240 KB
Volume
219
Category
Article
ISSN
0022-460X

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✦ Synopsis

For an electrical railway overhead wire system there are two main factors which crucially affect the quality of current collection. One is the spatial stiffness variation of the overhead wire along each span and the other is the flexural wave motion in the wire. In this paper a periodically excited single-degree-of-freedom (SDOF) model of a combined pantograph-catenary system is introduced and its basic dynamic behaviour is discussed. To investigate the effect of wave propagation in the overhead wire on vibration of the pantograph the dynamic stiffness of the catenary is introduced into the model. The dynamic stiffness of the catenary is determined by representing the overhead wire system as an infinite periodically spring-supported string. The results show that the dynamic stiffness of the catenary varies with train speed and its effect on the performance of the pantograph-catenary system is discussed.

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