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The nonlinear dynamics of flexural ultrasonic transducers
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Feeney, Andrew, Kang, Lei, Rowlands , George and Dixon, Steve M. (2019) The nonlinear dynamics of flexural ultrasonic transducers. In: 2019 International Congress on Ultrasonics, Bruges, Belgium, 3-6 Sep 2019. Published in: Proceedings of meetings on acoustics (ICU), 38 ISSN 1939-800X. doi:10.1121/2.0001095
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WRAP-nonlinear-dynamics-flexural-ultrasonic-transducers-Dixon-2020.pdf - Published Version - Requires a PDF viewer. Download (3340Kb) | Preview |
Official URL: http://dx.doi.org/10.1121/2.0001095
Abstract
Dynamic nonlinearity can manifest as changes in characteristic properties of a vibrating system in response to variations in excitation. This study investigates the nonlinearity in the vibration response of the flexural ultrasonic transducer. This device is typically employed for industrial measurement, but little is known about the influence of changes in excitation on its dynamics. In general, the resonance frequency of an ultrasonic device is known to shift as excitation amplitude is increased, displaying either hardening nonlinear behaviour, where resonance frequency increases, or softening associated with resonance frequency decrease. In typical operation, the vibration response of the flexural ultrasonic transducer has been found to be weakly nonlinear. Different physical mechanisms can cause nonlinearity, including structural configuration, the physical responses of components such as the transducer membrane, and thermomechanical properties inherent in piezoelectric materials. The nonlinear behaviour of flexural ultrasonic transducers is shown in the context of typical operation in practical application, through laser Doppler vibrometry and supported by fundamental mathematics. The results demonstrate the existence of nonlinear behaviour for different types of flexural ultrasonic transducer for modest changes in excitation amplitude, and show that the influence of dynamic nonlinearity should be considered in the practical application of flexural ultrasonic transducers.
| Item Type: | Conference Item (Paper) | ||||||
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| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Ultrasonic transducers, Nonlinear theories | ||||||
| Journal or Publication Title: | Proceedings of meetings on acoustics (ICU) | ||||||
| Publisher: | ASA Publications | ||||||
| ISSN: | 1939-800X | ||||||
| Book Title: | 2019 International Congress on Ultrasonics | ||||||
| Official Date: | 24 February 2019 | ||||||
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| Volume: | 38 | ||||||
| Article Number: | 045015 | ||||||
| DOI: | 10.1121/2.0001095 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Copyright Holders: | © 2020 Acoustical Society of America | ||||||
| RIOXX Funder/Project Grant: |
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| Conference Paper Type: | Paper | ||||||
| Title of Event: | 2019 International Congress on Ultrasonics | ||||||
| Type of Event: | Conference | ||||||
| Location of Event: | Bruges, Belgium | ||||||
| Date(s) of Event: | 3-6 Sep 2019 |
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