DeepAI AI Chat
Log In Sign Up

Computational design of locally resonant acoustic metamaterials

08/13/2021
by   D. Roca, et al.
Universitat Politècnica de Catalunya
0

The so-called Locally Resonant Acoustic Metamaterials (LRAM) are considered for the design of specifically engineered devices capable of stopping waves from propagating in certain frequency regions (bandgaps), this making them applicable for acoustic insulation purposes. This fact has inspired the design of a new kind of lightweight acoustic insulation panels with the ability to attenuate noise sources in the low frequency range (below 5000 Hz) without requiring thick pieces of very dense materials. A design procedure based on different computational mechanics tools, namely, (1) a multiscale homogenization framework, (2) model order reduction strategies and (3) topological optimization procedures, is proposed. It aims at attenuating sound waves through the panel for a target set of resonance frequencies as well as maximizing the associated bandgaps. The resulting design's performance is later studied by introducing viscoelastic properties in the coating phase, in order to both analyse their effects on the overall design and account for more realistic behaviour. The study displays the emerging field of Computational Material Design (CMD) as a computational mechanics area with enormous potential for the design of metamaterial-based industrial acoustic parts.

READ FULL TEXT

page 6

page 8

page 12

page 13

01/17/2022

Structured model order reduction for vibro-acoustic problems using interpolation and balancing methods

Vibration and dissipation in vibro-acoustic systems can be assessed usin...
01/29/2021

Acoustic Structure Inverse Design and Optimization Using Deep Learning

From ancient to modern times, acoustic structures have been used to cont...
04/18/2019

Removal of spurious solutions encountered in Helmholtz scattering resonance computations in R^d

In this paper we consider a sorting scheme for the removal of spurious s...
06/24/2022

How to hide your voice: Noise-cancelling bird photography blind

Getting close to birds is a great challenge in wildlife photography. Bir...
09/16/2019

Real-time 3-D Mapping with Estimating Acoustic Materials

This paper proposes a real-time system integrating an acoustic material ...
01/03/2023

Hyperuniform disordered parametric loudspeaker array

A steerable parametric loudspeaker array is known for its directivity an...
01/20/2020

On the Feasibility of Acoustic Attacks Using Commodity Smart Devices

Sound at frequencies above (ultrasonic) or below (infrasonic) the range ...