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The Effect of Boundary Conditions on Resonant Ultrasonic Spherical Chains

Akanji, O; Yang, J; Hutchins, D; Thomas, P; Davis, LA; Harput, S; Freear, S; ... Saffari, N; + view all (2016) The Effect of Boundary Conditions on Resonant Ultrasonic Spherical Chains. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control , 63 (11) pp. 1957-1966. 10.1109/TUFFC.2016.2576563. Green open access

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Abstract

The response of a resonant chain of spheres to changes in holder material and pre-compression is studied at ultrasonic frequencies. The system is found to be very sensitive to these parameters, with the creation of impulsive waveforms from a narrow bandwidth input seen only for certain chain lengths and holder materials. In addition, careful experiments were performed using known amounts of pre-compression force, using a calibrated stylus arrangement. At negligible pre-compression levels, impulses were generated within the chain, which were then suppressed by increased pre-compression. This was accompanied by large changes in propagation velocity as the system gradually changes from being strongly nonlinear to being more linear. Simulations using a discrete model for the motion of each sphere agree well with experimental data.

Type: Article
Title: The Effect of Boundary Conditions on Resonant Ultrasonic Spherical Chains
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TUFFC.2016.2576563
Publisher version: http://dx.doi.org/10.1109/TUFFC.2016.2576563
Language: English
Additional information: Copyright © 2016 IEEE. This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/
Keywords: spherical chains, Granular media, nonlinear, solitary waves, Force, Acoustics, Harmonic analysis, Mathematical model, Frequency control, Cutoff frequency, Dynamics
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Surgical Biotechnology
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1528751
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