Vibration characteristics measurement of beam-like structures using infrared thermography.
Talai, S.M. Desai, D.A. Heyns, P.S.
Talai, S.M.
Desai, D.A.
Heyns, P.S.
Citations
Altmetric:
Abstract
Infrared thermography (IRT) has matured and is now widely accepted as a condition monitoring tool where temperature is measured in a non-contact way. Since the late 1970s, it has been extensively used in vibro thermography (Sonic IR) non-destructive technique for the evaluation of surface cracks through the observation of thermal imaging of the vibration-induced crack heat generation. However, it has not received research attention on prediction of structural vibration behaviour, hence; the concept to date is not understood. Therefore, this paper explores its ability to fill the existing knowledge gap. To achieve
this, two cantilever beam-like structures couple with a friction rod subjected to a forced excitations while infrared cameras capturing the thermal images on the friction interfaces. The analysed frictional temperature evolution using the Matlab Fast Fourier Transform (FFT) algorithm and the use of the heat conduction
equation in conjunction with a finite difference approach successfully identifies the structural vibration characteristics; with maximum error of 0.28% and 20.71% for frequencies and displacements, respectively. These findings are particularly useful in overcoming many limitations inherent in some of the current vibration measuring techniques applied in structural integrity management such as strain gauge failures due to fatigue.
Description
Date
2016-09-09
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B.V.
Research Projects
Organizational Units
Journal Issue
Keywords
Vibration behaviour, Infrared thermograph, Frictional heat generation, Condition monitoring