| Campo DC | Valor | Idioma |
|---|
| dc.contributor.author | Machado, Marcela Rodrigues | - |
| dc.contributor.author | Moura, B. B. | - |
| dc.contributor.author | Dey, S. | - |
| dc.contributor.author | Mukhopadhyay, Tanmoy | - |
| dc.date.accessioned | 2023-10-05T13:25:21Z | - |
| dc.date.available | 2023-10-05T13:25:21Z | - |
| dc.date.issued | 2022 | - |
| dc.identifier.citation | MACHADO, M. R. et al. Bandgap manipulation of single and multi-frequency smart metastructures with random impedance disorder. Smart Materials and Structures, [S.l.], v. 31, n. 10, 2022. DOI: 10.1088/1361-665X/ac8ef9. Disponível em: https://iopscience.iop.org/article/10.1088/1361-665X/ac8ef9. | pt_BR |
| dc.identifier.uri | http://repositorio2.unb.br/jspui/handle/10482/46622 | - |
| dc.language.iso | eng | pt_BR |
| dc.publisher | IOP Publishing Ltd | pt_BR |
| dc.rights | Acesso Restrito | pt_BR |
| dc.title | Bandgap manipulation of single and multi-frequency smart metastructures with random impedance disorder | pt_BR |
| dc.type | Artigo | pt_BR |
| dc.subject.keyword | Metamateriais | pt_BR |
| dc.subject.keyword | Vibração | pt_BR |
| dc.subject.keyword | Método do elemento espectral | pt_BR |
| dc.subject.keyword | Ondas (Física) | pt_BR |
| dc.identifier.doi | 10.1088/1361-665X/ac8ef9 | pt_BR |
| dc.relation.publisherversion | https://iopscience.iop.org/article/10.1088/1361-665X/ac8ef9 | pt_BR |
| dc.description.abstract1 | Metamaterials and metastructures usually exhibit some form of periodicity that is broken due to
randomness in the media, affecting the vibration and elastic wave propagation performance.
Disorder in the periodicity caused by the variability in properties or geometry may lead to
interesting physical phenomena such as trapping and scattering waves, wave reflection, and
energy localisation. While the randomness may be attributed to manufacturing irregularities and
quantifying its effect is crucial for ensuring adequate performance of a range of smart systems,
and these effects can also be exploited for manipulating the wave properties. Here we
investigate a smart metastructure in the form of a beam integrated with piezoelectric transducers
coupled to a resonant shunt circuit. The piezoelectric shunt in a periodical arrangement can
induce locally resonant bandgaps that can be employed in wave (and vibration) manipulation
and control. This paper quantifies the uncertainty associated with electrical circuit components
that affect the circuit impedance influencing wave and vibration control features. The smart
unimorph meta-beam is formulated by spectral element method based on the Hamiltonian
principle, and dispersion curves are estimated using the spectral transfer matrix method that
relies on the Bloch-Floquet theorem. The first and second statistical moments are obtained from
the stochastic simulations (∼104 realizations) that could be realized efficiently due to the
current development of spectral element approach for analysing the disordered system. Further
experimental validation and exploration of shunt circuit confirms the need to include the
stochastic information on the numerical model used to design the metastructure. Numerical
results of the unimorph meta-beam with single and multi-frequency shunt configuration show
that the bandgap behaviour is sensitive to the random disorder associated with circuit impedance
parameters. Such disorder can be exploited for enhanced functionalities of the meta-beam based
on optimal RL shunt circuits for controlling structural vibration response along with wave
propagation and attenuation. | pt_BR |
| dc.identifier.orcid | https://orcid.org/0000-0002-7488-7201 | pt_BR |
| dc.identifier.orcid | https://orcid.org/0000-0002-0778-6515 | pt_BR |
| dc.description.unidade | Faculdade de Tecnologia (FT) | pt_BR |
| dc.description.unidade | Departamento de Engenharia Mecânica (FT ENM) | pt_BR |
| Aparece nas coleções: | Artigos publicados em periódicos e afins
|
