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The non-stationarity of apparent bridge natural frequencies during vehicle crossing events
Author(s)
Date Issued
2013-12
Date Available
2015-09-22T10:08:11Z
Abstract
In this paper, it is shown numerically how the natural frequencies of a bridge change during the crossing of a vehicle. An Euler-Bernoulli beam is modelled traversed by a single DOF vehicle. The use of such a simple Vehicle-Bridge interaction model is justified by the objective of providing insight into the structural dynamics of a moving load interacting with a bridge. The numerical results indicate that the variations in natural frequencies depend greatly on vehicle-to-structure frequency ratio and mass ratio. In some conditions, significant variations in modal properties are observed. Additionally, it can be analysed from the passing vehicle response. Time-frequency signal analysis of the vehicle's vertical acceleration clearly shows how the frequencies evolve during the event. The frequency localization properties of the Wavelet transform (Modified Littlewood-Paley) are exploited in analysing the signal and highlighting the relevant results.
Sponsorship
European Commission - Seventh Framework Programme (FP7)
Type of Material
Journal Article
Publisher
Faculty of Mechanical Engineering
Journal
FME Transactions
Volume
41
Issue
4
Start Page
279
End Page
284
Copyright (Published Version)
2013 Faculty of Mechanical Engineering, Belgrade
Web versions
Language
English
Status of Item
Peer reviewed
ISSN
1451-2092
This item is made available under a Creative Commons License
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