BANDO PRIN 2022D. D. N. 104 DEL 2 FEBBRAIO 2022

TITOLO DEL PROGETTO: Design of Acoustic Metamaterials for Aeronautical applications (DAMA)

CODICE CUP: D53D23003270006

Budget: € 81.113

P.I.  Maria Cinefra

Altre Unità di Ricerca o eventuali Sub Unità:

• Politecnico di Torino; 

• Università degli Studi di Napoli Federico II.

Project Overview

The project “Design of Acoustic Metamaterials for Aeronautical Applications (DAMA)” focuses on the development of advanced numerical and experimental methodologies for designing innovative acoustic metamaterials aimed at reducing noise and vibrations in aircraft cabins. The research adopts a multidisciplinary approach combining structural dynamics, vibro-acoustics, advanced numerical modelling, and experimental validation, with the goal of improving the vibro-acoustic performance of lightweight and tunable solutions for aerospace applications.

Objectives

The main objective of the project is to enhance acoustic comfort in aircraft cabins through the design of high-performance metamaterials. This includes:

• modelling the vibro-acoustic response of aircraft structures;

• developing advanced numerical tools for complex metamaterial geometries;

• designing lightweight and tunable structures capable of controlling wave propagation;

• validating the proposed solutions through experimental testing.

Expected Results

The project initially aimed to:

• establish a robust numerical framework for the analysis of complex vibro-acoustic systems;

• identify innovative metamaterial configurations with enhanced acoustic properties;

• demonstrate improved transmission loss and vibration reduction compared to traditional solutions;

• validate numerical predictions through experimental campaigns;

• provide a foundation for future large-scale applications in aeronautical structures.

Achieved Results

The project successfully delivered significant advancements in both modelling and experimental validation. In particular:

• a comprehensive numerical framework based on the Carrera Unified Formulation and adaptive finite elements was developed;

• origami-based metamaterials (notably Miura-ori structures) were identified and optimized for tunability and acoustic performance;

• vibro-acoustic models, including Rayleigh integral formulations, were implemented for non-planar structures;

• experimental tests confirmed the effectiveness of the proposed metamaterials, showing improved acoustic attenuation and strong dependence on geometric parameters;

The results demonstrated the feasibility of designing lightweight, tunable acoustic metamaterials for aerospace applications, providing a solid basis for future developments and full-scale integration.