On the use of local resonators to form a super attenuation band in a beam meta-structure

• Grant number: 24/02409-8
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: April 01, 2024
• End date: March 31, 2025
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Domingos Alves Rade
• Grantee: Vinícius Germanos Cleante
• Supervisor: Timothy Paul Waters
• Host Institution: Divisão de Engenharia Mecânica (IEM). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil
• Institution abroad: University of Southampton, England
• Associated to the scholarship: 22/11995-2 - Designing Metamaterials Using Geometrical Nonlinearity to Form a Super Attenuation Band at Low Frequencies, BP.PD

Abstract

This document describes the work plan to be carried out at the Institute of Sound and Vibration Research (ISVR) at the University of Southampton/United Kingdom under the supervision of Professor Dr. Timothy Waters. The project is scheduled to be carried out in 12 months. The research project proposes to investigate the formation of a super attenuation band in multi-coupled structures, such as a beam, using an array of moment vibration absorbers. In mono-coupled structures, merging the local resonance mechanism and the Bragg Scattering mechanism has proven to be effective to improve the attenuation properties. However, to achieve the same physical behaviour it is still a challenge in multi-couple structures, mainly due to dynamic interaction of multiple coordinates which acts simultaneously at the same position in the structure. The project will investigate theoretically a structure with a single and an array of moment vibration absorbers. The aim is to develop dynamic analysis to predict the required device configuration in order to form the super attenuation band. This project will also design and perform experimental tests to validate the theoretical predictions. This will give access to determine its benefits and limitations and also to determine their practical applications in the engineering area. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CARNEIRO JR, JEAN P.; BRENNAN, MICHAEL J.; GONSALVES, PAULO J. P.; SOROKIN, VLADISLAV S.; CLEANTE, VINICIUS G.; MACE, BRIAN R.. Controlling vibration propagation in a thin beam using a neutraliser. Journal of Sound and Vibration, v. 602, p. 14-pg., 2025-01-22. (22/09543-6, 19/19335-9, 24/02409-8, 18/15894-0, 22/11995-2)