University Of Tasmania
Browse

File(s) under permanent embargo

Beam damage detection using synchronisation of peaks in instantaneous frequency and amplitude of vibration data

journal contribution
posted on 2023-05-20, 16:44 authored by Mousavimirkalaei, M, Damien HollowayDamien Holloway, Jan OlivierJan Olivier, Gandomi, AH
This paper explores the advantages of Variational Mode Decomposition (VMD) in detecting local damage on beam type structures (bridge) subjected to a sprung mass (vehicle). VMD is used to decompose the acceleration time history of the bridge at its midspan into its constitutive intrinsic mode functions (IMFs). The instantaneous frequency (IF) and instantaneous amplitude (IA) of the first IMF show irregularities at the damage position. We demonstrate through computer simulation that VMD is superior for detecting damage when compared to the well-known Empirical Mode Decomposition (EMD) method. A new damage sensitive feature (DSF) is also introduced that considers synchronisation of peaks between the IA and IF signals. The results show that the new DSF can enhance the peak at the damage positions while suppressing peaks at other locations.

History

Publication title

Measurement

Volume

168

Article number

108297

Number

108297

Pagination

1-14

ISSN

0263-2241

Department/School

School of Engineering

Publisher

Elsevier Sci Ltd

Place of publication

The Boulevard, Langford Lane, Kidlington, Oxford, England, Oxon, Ox5 1Gb

Rights statement

Copyright 2020 Elsevier

Repository Status

  • Restricted

Socio-economic Objectives

Environmental policy, legislation and standards not elsewhere classified