Broadband and multimode attenuation in Duffingand NES-type piezoelectric metastructures

Autor(es)

Mosquera-Sanchez, J. A. ; De Marqui Jr, C.

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES; v. 270, p. 16-pg., 2024-02-08.

Resumo

This paper reports the dynamic effects leveraged into one-dimensional metastructures by Duffing- and Nonlinear Energy Sink (NES)-type piezoelectric attachments. The versatility of the nonlinear piezoelectric attachments enables the exploitation of their rich dynamic features under low amplitude excitation regimes. Numerical and experimental results show that this class of nonlinear metastructures present reconfigurable attenuation bands as a function of the strength of nonlinearity. Broadband and multimode vibration attenuation become enhanced due to the wave supratransmission phenomenon, as the strength of nonlinearity increases in the piezoelectric attachments. While the experimentally investigated metastructure with Duffing-type piezoelectric attachments presents normalized bandwidths, 4 ohm, of 0.84 around the underlying linear resonating frequency, it is shown for the first time in the literature that the finite beam with NES-type piezoelectric attachments exhibits impressive Delta ohm values in excess of 1.90, including strong attenuation of several linear transmissibility peaks. The results open new avenues for fully tunable metastructures with enhanced broadband and multimode vibration attenuation features, based on nonlinear piezoelectric shunt circuits. (AU)

• Processo FAPESP: 22/01922-8 - EMU concedido no processo 2018/15894-0: Laser Doppler Vibrometer (EESC)
• Beneficiário: Carlos de Marqui Junior
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 18/14546-9 - Controle e coleta de energia de distúrbios vibro-acústicos de baixa frequência usando metaestruturas inteligentes
• Beneficiário: Jaime Alberto Mosquera Sánchez
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/15894-0 - Projeto e otimização de estruturas periódicas para aprimoramento de desempenho vibroacústico
• Beneficiário: Carlos de Marqui Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 20/01608-6 - Metamaterial eletroelástico não-linear para a mitigação de vibrações de baixa frequência e de banda larga
• Beneficiário: Jaime Alberto Mosquera Sánchez
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 13/07375-0 - CeMEAI - Centro de Ciências Matemáticas Aplicadas à Indústria
• Beneficiário: Francisco Louzada Neto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs