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Title: An investigation of ultrasonic transducer loading on a workpiece
Authors: Zennaro, Marco
Haig, Alex
O'Boy, D.J.
Walsh, Stephen J.
Issue Date: 2018
Publisher: © Asme
Citation: ZENNARO, M. ... et al., 2018. An investigation of ultrasonic transducer loading on a workpiece. IN: Proceedings of the 2018 ASME International Conference and Exposition on Noise Control Engineering (NCAD2018), Chicago, Illinois, USA, 26-29th Aug.
Abstract: Arrays of dry-coupled thickness-shear transducers are often employed in the guided wave sector to inspect pipelines and plate-like structure. The dry coupling permits to dismiss any coupling material between the transducer and the waveguide, but as a drawback a preload must be applied on the transducers to guarantee an effective coupling between the two surfaces. Although the influence of the preload on the natural frequencies is studied in the literature, the frequency response function of a transducer relating the input voltage to the displacement output is not present in the literature. Moreover, the distribution of force on the backing mass and the effect of the preload on the uniformity of vibration of the transducers are still missing. A natural frequency analysis and a forced analysis are then computed numerically with finite element analysis to quantify the influence of the preload on a thickness-shear transducer. Furthermore, these results are compared with experimental results obtained with a Laser Vibrometer. It is then shown how the geometrical layout of the transducer coupled with the preload influences the vibration of the transducer.
Description: This paper is in closed access. It was part of the 47th International Congress and Exposition on Noise Control Engineering (Inter-Noise 2018)
Sponsor: The corresponding author would like to acknowledge the financial support of Loughborough University and the Lloyd’s Registered Foundation.
Version: Accepted for publication
DOI: 10.1115/NCAD2018-6125
URI: https://dspace.lboro.ac.uk/2134/34742
Publisher Link: https://doi.org/10.1115/NCAD2018-6125
ISBN: 9780791851425
Appears in Collections:Closed Access (Aeronautical and Automotive Engineering)

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NCAD2018-6125_draft.docxSubmitted version25.15 MBDocXView/Open
NCAD2018_6125_Final_ASMET.docAccepted version23.32 MBMicrosoft WordView/Open
NCAD2018_6125_Final2_ASMET.pdfPublished version314.41 kBAdobe PDFView/Open


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