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A FRACTIONAL DERIVATIVE RAILPAD MODEL INCLUDED IN A RAILWAY TRACK MODEL

✍ Scribed by Å. Fenander

Book ID
102609730
Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
245 KB
Volume
212
Category
Article
ISSN
0022-460X

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✦ Synopsis

When studying the dynamic behaviour of a railway track, the accurate modelling of the behaviour of railpads is important. Here a fractional derivative railpad model is included in a railway track model. The response of the track model to a force traversing the track at a constant speed is calculated by use of a time integration method. Both a constant traversing force and a force modelled as a stochastic process are studied. For comparison an ordinary railpad model with a discrete elastic spring and a discrete viscous damper in parallel is also used in the track model. The calculated displacements when using the two different models are similar. A non-linear railpad model is also implemented, and is found to result in a slightly different response.

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