Robust project of resonant shunt circuit for passive vibration control of composite structures

Ribeiro, Lorrane Pereira; Lima, Antônio Marcos Gonçalves de; Silva, V. A. C.

doi:10.1007/s40430-020-02396-1

Cited by 6 publications

(2 citation statements)

References 18 publications

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“…Variabilities in the media break its periodicity, causing disorder that affects the wave propagation and dynamic performances [34,35]. The problem of vibration control using resonant shunts with random electrical components was analysed in [36,37]. Porfiri and Andreaus [38] showed that the circuit's resonance may be lost when the electrical impedance varies concerning its optimal value, which is a crucial issue in quantifying the effect of electrical parameters variations on the system performance.…”

Section: Introductionmentioning

confidence: 99%

Bandgap manipulation of single and multi-frequency smart metastructures with random impedance disorder

Machado¹,

Moura²,

Dey³

et al. 2022

Smart Mater. Struct.

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Randomness in the media breaks its periodicity aﬀecting the vibration and wave propagation performance. Such disorder caused by the variability 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, 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. Such uncertainty essentially propagates to the beam smart metamaterial, inﬂuencing its wave and vibration control feature. 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, which can, in turn, be exploited for enhanced functionalities based on optimal RL shunt circuits for controlling structural vibration response along with wave propagation and attenuation.

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Section: Introductionmentioning

confidence: 99%

Bandgap manipulation of single and multi-frequency smart metastructures with random impedance disorder

Machado¹,

Moura²,

Dey³

et al. 2022

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…Pode-se citar como exemplo as vibrações causadas pela ressonância solo em helicópteros (SANCHES; RADE, 2013), como ilustrado na Neste sentido, a atenuação de vibrações e ruído de sistemas é parte importante de qualquer projeto de engenharia, de modo que a predição do seu comportamento requer que tanto o procedimento de modelagem como o de sua caracterização seja confiável. Dentre as várias técnicas de controle de vibrações existentes (RIBEIRO et al, 2020;GONÇALVES et al, 2019;CUNHA-FILHO et al, 2016), as técnicas de controle passivo via emprego de materiais viscoelásticos apresentam muitas vantagens, a saber: não conferem instabilidade ao sistema; são eficientes numa ampla faixa de frequência; baixo custo de instalação e manutenção; e seu funcionamento não requer consumo externo de energia. A principal desvantagem é que sua eficiência depende tanto da frequência de excitação como da temperatura de operação do material viscoelástico.…”

Section: Contexto Do Estudounclassified

Modelagem numérico-computacional de vigas sanduiches viscoelásticas sujeitas a grandes deslocamentos na presença de Incertezas paramétricas

Júnior¹,

da²

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This work is dedicated to numerical-computational modeling of viscoelastically damped sandwich beam structures and subject to non-linearity by large displacements. To evaluate the nonlinear effects, the strain field was modeled according to the classical theory of Von Karman and the nonlinear response of the system obtained by combining the Galerkin method and the Harmonic Balance method. In order to represent the effects of damping on the Galerkin base, it was necessary to solve the complex eigenvalue problem, and in this case, an iterative method was proposed so that the undamped natural frequencies converged to the damped frequencies. The costly computational effort during the calculation of the complex eigenvalues was reduced thanks to the model reduction method proposed in this work. In order to take into account the uncertainties arising from geometric and physical factors, a non-linear stochastic model based on the discretization of random Karhunen-Loève fields was also evaluated. To verify the accuracy of the deterministic and stochastic numerical-computational model for the nonlinear sandwich beam, an experimental procedure was also carried out inside a thermal camera with strict temperature control. Through the various examples of simulations and experimental tests, the results show that the methodologies proposed in this work were able to represent the influence of operational and environmental conditions on dynamic responses in viscoelastic systems with geometric nonlinearity. It was verified both numerically and experimentally that the non-linear response of the system is influenced by factors such as the excitation force and the operating temperature of the viscoelastic material.

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Semi-analytical solutions for the forced vibration of plate structures terminated by multiple acoustic black hole beams

Fan

Deng

2023

J Braz. Soc. Mech. Sci. Eng.

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Robust project of resonant shunt circuit for passive vibration control of composite structures

Cited by 6 publications

References 18 publications

Bandgap manipulation of single and multi-frequency smart metastructures with random impedance disorder

Bandgap manipulation of single and multi-frequency smart metastructures with random impedance disorder

Modelagem numérico-computacional de vigas sanduiches viscoelásticas sujeitas a grandes deslocamentos na presença de Incertezas paramétricas

Semi-analytical solutions for the forced vibration of plate structures terminated by multiple acoustic black hole beams

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