Dynamics of an impact oscillator with SMA constraint
Dynamics of an impact oscillator with SMA constraint
The dynamic behaviour of an impact oscillator with an SMA constraint has been modelled and analysed. Following the formulation proposed by Bernardini and his co-authors [1,2] describing thermo-mechanics of SMA elements, we obtain a compact thermo-mechanical model of an impact pseudoelastic oscillator. Due to the mechanical characteristics of SMA element and non-smooth nature of the impacts, five different modes of operation can be distinguished for this system. The undertaken numerical investigation suggests that the system can exhibit complex dynamic responses which if appropriately controlled can be used for vibration reduction. For this reason alone a comparison with an equivalent elastic oscillator was made. It was found out that low amplitude regimes are not affected by the presence of SMA element. On contrary, for the large amplitude responses a significant vibration reduction was achieved due to the phase transformations.
229-238
Sitnikova, E.
e0c2f901-24fe-43d0-88e8-76f415675104
Pavlovskaia, E.
5e74fb20-062a-47b3-bae0-46efef3ac5bf
Wiercigroch, M.
8396f35e-4846-4ee2-ad6a-6e66ef4a2afb
20 December 2008
Sitnikova, E.
e0c2f901-24fe-43d0-88e8-76f415675104
Pavlovskaia, E.
5e74fb20-062a-47b3-bae0-46efef3ac5bf
Wiercigroch, M.
8396f35e-4846-4ee2-ad6a-6e66ef4a2afb
Sitnikova, E., Pavlovskaia, E. and Wiercigroch, M.
(2008)
Dynamics of an impact oscillator with SMA constraint.
European Physical Journal: Special Topics, 165 (1), .
(doi:10.1140/epjst/e2008-00866-8).
Abstract
The dynamic behaviour of an impact oscillator with an SMA constraint has been modelled and analysed. Following the formulation proposed by Bernardini and his co-authors [1,2] describing thermo-mechanics of SMA elements, we obtain a compact thermo-mechanical model of an impact pseudoelastic oscillator. Due to the mechanical characteristics of SMA element and non-smooth nature of the impacts, five different modes of operation can be distinguished for this system. The undertaken numerical investigation suggests that the system can exhibit complex dynamic responses which if appropriately controlled can be used for vibration reduction. For this reason alone a comparison with an equivalent elastic oscillator was made. It was found out that low amplitude regimes are not affected by the presence of SMA element. On contrary, for the large amplitude responses a significant vibration reduction was achieved due to the phase transformations.
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Published date: 20 December 2008
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Local EPrints ID: 497602
URI: http://eprints.soton.ac.uk/id/eprint/497602
ISSN: 1951-6355
PURE UUID: b7a66199-c5c9-4e93-861a-ab4dea0b8a84
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Date deposited: 28 Jan 2025 17:49
Last modified: 29 Jan 2025 03:16
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Author:
E. Sitnikova
Author:
E. Pavlovskaia
Author:
M. Wiercigroch
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