Determinations of Stress Wave Velocity in a Timber Pole using Wavelet Transform

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dc.contributor.author Subhani, S
dc.contributor.author Li, J
dc.contributor.author Samali, B
dc.contributor.author Dackermann, U
dc.contributor.editor Law, S
dc.contributor.editor Cheng, L
dc.contributor.editor Xia, Y
dc.contributor.editor SU, Z
dc.date.accessioned 2012-10-12T03:36:30Z
dc.date.issued 2011-01
dc.identifier.citation Proceeding of The 14th Asia Pacific Conferance, 2011, pp. 222 - 231
dc.identifier.isbn 978-962-367-731-8
dc.identifier.other E1 en_US
dc.identifier.uri http://hdl.handle.net/10453/19266
dc.description.abstract This paper presents an application of Wavelet Transform (WT) for determination of stress wave velocity for Non-destructive Testing of timber utility poles in service. For surface Non-destructive Testing (NDT), the hammer impact, which produces generally broadband frequency excitation, is used to generate stress wave. Moreover, due to practicality the impact location for field testing of a utility pole is on the side of the pole and 1.5 m above ground level. And the geometry of utility pole could not guarantee non-dispersive longitudinal wave. All of these issues have resulted in lack of accuracy and reliability of results from surface NDT in field testing. In recognition of such problem, this research explores methods to reliably calculate desired wave velocity by isolating wave mode and studying dispersive nature of utility pole. Fast Fourier Transform (FFT) is firstly conducted to determine the suitable frequency from a stress wave data. Then WT is applied on the wave data mentioned to perform time-frequency analysis. Velocity can be determined by time history data of desired frequency from WT results which will be compared with the available analytical solution for longitudinal wave velocity. The results of the investigation showed that wavelet transform analysis can be a reliable signal processing tool for non-destructive testing in terms of velocity determination, which in turn also helps to determine the embedded length of the timber pole.
dc.format Ryan Stoker
dc.publisher The Hong Kong Polytechnic University
dc.title Determinations of Stress Wave Velocity in a Timber Pole using Wavelet Transform
dc.type Conference Proceeding
dc.parent Proceeding of The 14th Asia Pacific Conferance
dc.journal.number en_US
dc.publocation Hong Kong en_US
dc.publocation Hong Kong
dc.identifier.startpage 222 en_US
dc.identifier.endpage 231 en_US
dc.cauo.name FEIT.School of Civil and Environmental Engineering en_US
dc.conference Verified OK en_US
dc.conference Dynamics for Sustainable Engineering
dc.conference Dynamics for Sustainable Engineering
dc.for 0905 Civil Engineering
dc.personcode 930859
dc.personcode 870186
dc.personcode 995216
dc.personcode 110142
dc.percentage 100 en_US
dc.classification.name Civil Engineering en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom Dynamics for Sustainable Engineering en_US
dc.date.activity 20111205 en_US
dc.date.activity 2011-12-05
dc.date.activity 2011-12-05
dc.location.activity Hong Kong en_US
dc.location.activity Hong Kong
dc.description.keywords non-destructive testing, timber pole, stress wave, wavelet transform
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group /University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group /University of Technology Sydney/Strength - Built Infrastructure
utslib.copyright.status Open Access
utslib.copyright.date 2015-04-15 12:23:47.074767+10
pubs.consider-herdc true
utslib.collection.history General (ID: 2)


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