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Evolution of ultrasonic impulses in chains of spheres using resonant excitation
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Hutchins, David A., Yang, J., Akanji, Omololu, Thomas, P. J. (Peter J.), Davies, L. A. J., Freear, Steven, Harput, Sevan, Saffari, Nader and Gelat, Pierre (2015) Evolution of ultrasonic impulses in chains of spheres using resonant excitation. EPL (Europhysics Letters) , 109 (5). Article number 54002. doi:10.1209/0295-5075/109/54002
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Official URL: http://dx.doi.org/10.1209/0295-5075/109/54002
Abstract
It is demonstrated that broad-bandwidth ultrasonic signals containing frequency components in excess of 200 kHz can be created in spherical chains using harmonic excitation at 73 kHz. Multiple reflections created a periodic waveform containing both harmonics and sub-harmonics of the original forcing frequency, due to non-linear Hertzian contact. These discrete frequencies represented some of the many allowed non-linear normal modes of vibration of the whole chain. Excitation at a single fixed frequency could thus be used to produce wide-bandwidth impulses for different lengths of spherical chains. Experimental results were in good agreement with theoretical predictions.
| Item Type: | Journal Article | ||||||||||
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| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||
| Library of Congress Subject Headings (LCSH): | Wave mechanics, Waves, Sound-waves, Vibration | ||||||||||
| Journal or Publication Title: | EPL (Europhysics Letters) | ||||||||||
| Publisher: | E D P Sciences | ||||||||||
| ISSN: | 0295-5075 | ||||||||||
| Official Date: | 10 March 2015 | ||||||||||
| Dates: |
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| Volume: | 109 | ||||||||||
| Number: | 5 | ||||||||||
| Article Number: | Article number 54002 | ||||||||||
| DOI: | 10.1209/0295-5075/109/54002 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Open Access | ||||||||||
| Description: | Erratum to this article : Erratum: Evolution of ultrasonic impulses in chains of spheres using resonant excitation doi:10.1209/0295-5075/109/59903 |
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| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||||||||
| Grant number: | EP/K030159/1 |
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