Performance improvement of smart metastructures for broadband vibroa-coustic control

• Grant number: 23/00687-8
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: April 01, 2023
• End date: March 31, 2026
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Agreement: Research Foundation - Flanders (FWO)
• Principal Investigator: Leopoldo Pisanelli Rodrigues de Oliveira
• Grantee: Gabriel Konda Rodrigues
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 21/05510-3 - Mass-manufacturable metamaterials with passive and smart inclusions for broadband noise and vibration attenuation performance, AP.R

Abstract

Due to a bigger concern and regulamentation about sound emissions and exposure combined with sustainability and reduced ecological footprints, a trend toward lightweight sound and vibration control was established. The metamaterials are one particular solution that has demonstrated potential to effectively suffice the demands without the mass and volumetric penalties of classical methods. However, the fabrication scalability for the metamaterials is a limiting factor for commercial application. Given the need of low frequency actuation on vibroacoustic problems, the metamaterials require an addition of resonant inclusions that often are composed with intricate geometry, which considerably difficult the manufacturing process. Moreover, the metamaterials exhibit a narrowband control that jeopardizes their real world utilization. Therefore, this project proposes the creation of a metamaterial solution for mass-producing with the incorporation of smart materials. This solution is paired with the development of a multi-physical modelling framework for optimization of geometry and for the maximization of the coupling effect of the smart material inclusions. This procedure aims to achieve a satisfactory broadband control performance to be validated at the end of the project by the manufacture of physical prototypes. (AU)