Multimodal passive vibration control of sandwich beams with shunted shear piezoelectric materials

Autor(es)

Trindade, M. A. ^[1] ; Maio, C. E. B. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Mech Engn, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Smart Materials and Structures; v. 17, n. 5, p. 055015, 2008.
• Citações Web of Science: 20

Resumo

This work presents a performance analysis of multimodal passive vibration control of a sandwich beam using shear piezoelectric materials, embedded in a sandwich beam core, connected to independent resistive shunt circuits. Shear piezoelectric actuators were recently shown to be more interesting for higher frequencies and stiffer structures. In particular, for shunted damping, it was shown that equivalent material loss factors of up to 31% can be achieved by optimizing the shunt circuit. In the present work, special attention is given to the design of multimodal vibration control through independent shunted shear piezoelectric sensors. In particular, a parametric analysis is performed to evaluate optimal configurations for a set of modes to be damped. Then, a methodology to evaluate the modal damping resulting from each shunted piezoelectric sensor is presented using the modal strain energy method. Results show that modal damping factors of 1%-2% can be obtained for three selected vibration modes. (AU)

• Processo FAPESP: 04/15757-0 - Controle passivo de vibrações em vigas sanduíche usando atuadores piezoelétricos: análise paramétrica e otimização
• Beneficiário: Carlos Eduardo Bassi Maio
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 04/10255-7 - Controle de vibrações em estruturas laminadas com camadas elásticas, piezoelétricas e viscoelásticas
• Beneficiário: Marcelo Areias Trindade
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 06/00802-6 - Analise do controle passivo de vibracoes usando atuadores piezoeletricos em cisalhamento conectados a circuitos shunt.
• Beneficiário: Carlos Eduardo Bassi Maio
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica