Vibration reduction of the impact system by an SMA restraint: numerical studies

Elena Sitnikova, Ekaterina Pavlovskaia, Marian Wiercigroch, Marcelo A Savi

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The dynamic behaviour of an impact oscillator with a shape memory alloy (SMA) restraint is modelled and analyzed. This impact oscillator has the secondary support made from an SMA and the thermo-mechanical description of the SMA element follows the formulation proposed by Bernardini et al. [1] and [2]. The thermo-mechanical coupling terms included in the energy balance equation allow to undertake the non-isothermal analysis. Due to the mechanical characteristics of the SMA element and the non-smooth nature of the impacts, five different modes of operation can be distinguished. The undertaken numerical investigations suggest that the system can exhibit complex dynamic responses, which if appropriately controlled can be used for vibrationreduction. A comparison with an equivalent elastic oscillator is made. It is found out that the low amplitude regimes are not affected by the SMA element. On contrary, for the large amplitude responses, a significant vibrationreduction may be achieved due to the phase transformation hysteresis loop. Various bifurcation scenarios are constructed and the influence of the SMA element is discussed. In particular, the analysis of the frequency and amplitude variations of the external excitation is given and the parameter ranges where the vibrationreduction is possible are identified.
Original languageEnglish
Pages (from-to)837-849
Number of pages13
JournalInternational Journal of Non-Linear Mechanics
Volume45
Issue number9
Early online date11 Jan 2010
DOIs
Publication statusPublished - Nov 2010

Fingerprint

Shape Memory
Shape memory effect
Numerical Study
Vibration
Thermo-mechanical Coupling
Hysteresis Loop
Bifurcation (mathematics)
Modes of Operation
Phase Transformation
Energy Balance
Balance Equations
Complex Dynamics
Hysteresis loops
Energy balance
Numerical Investigation
Dynamic Response
Dynamic Behavior
Dynamic response
Bifurcation
Excitation

Keywords

  • non-smooth system
  • non-linear dynamics
  • chaos
  • vibration reduction
  • shape memory alloy
  • smart materials

Cite this

Vibration reduction of the impact system by an SMA restraint : numerical studies. / Sitnikova, Elena; Pavlovskaia, Ekaterina; Wiercigroch, Marian; Savi, Marcelo A.

In: International Journal of Non-Linear Mechanics, Vol. 45, No. 9, 11.2010, p. 837-849.

Research output: Contribution to journalArticle

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AB - The dynamic behaviour of an impact oscillator with a shape memory alloy (SMA) restraint is modelled and analyzed. This impact oscillator has the secondary support made from an SMA and the thermo-mechanical description of the SMA element follows the formulation proposed by Bernardini et al. [1] and [2]. The thermo-mechanical coupling terms included in the energy balance equation allow to undertake the non-isothermal analysis. Due to the mechanical characteristics of the SMA element and the non-smooth nature of the impacts, five different modes of operation can be distinguished. The undertaken numerical investigations suggest that the system can exhibit complex dynamic responses, which if appropriately controlled can be used for vibrationreduction. A comparison with an equivalent elastic oscillator is made. It is found out that the low amplitude regimes are not affected by the SMA element. On contrary, for the large amplitude responses, a significant vibrationreduction may be achieved due to the phase transformation hysteresis loop. Various bifurcation scenarios are constructed and the influence of the SMA element is discussed. In particular, the analysis of the frequency and amplitude variations of the external excitation is given and the parameter ranges where the vibrationreduction is possible are identified.

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