Diseño de Metamateriales acústicos manufacturados usando impresión 3D

Abstract

CONDITION FOR PUBLICATION OF PROJECT. This project addresses low-frequency noise control through the design of acoustic metamaterials. The objective is to characterize the acoustic absorption curves of resonant geometries that can be manufactured using 3D printing. The hypothesis is that finite element modeling (FEM) can accurately predict acoustic behavior and that manipulating geometric parameters allows for tuning maximum attenuation at specific frequencies. To develop the project, various metamaterial geometries based on the Helmholtz resonator were modeled using CAD software. Subsequently, a harmonic analysis was performed in ANSYS to simulate the acoustic response and determine the absorption coefficient of each design. The main results were sound absorption curves as a function of frequency, identifying the maximum attenuation peaks for each geometric configuration. A direct correlation was established between the dimensions of the resonator (cavity volume, neck diameter) and the resonance frequency predicted by the FEM model. It is concluded that FEM simulation-based design is a viable and effective tool for developing customized acoustic metamaterials, and that these represent an optimized alternative to conventional absorbent materials. Keywords: Sound absorption, Metamaterials, FEM simulation, Helmholtz resonator, 3D printing