The non-stationarity of apparent bridge natural frequencies during vehicle crossing events
|Title:||The non-stationarity of apparent bridge natural frequencies during vehicle crossing events||Authors:||Cantero, Daniel
O'Brien, Eugene J.
|Permanent link:||http://hdl.handle.net/10197/7077||Date:||Dec-2013||Online since:||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.||Funding Details:||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||Keywords:||Bridge; Natural frequency; Wavelet; Dynamics; Vibration; Non-stationary; Vehicle||Other versions:||http://www.mas.bg.ac.rs/istrazivanje/fme/vol41||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Civil Engineering Research Collection|
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