In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 151, No. 4_Supplement ( 2022-04-01), p. A180-A180
Abstract:
Locally resonant metamaterials (LRS) for sound and vibration mitigation have been a widely investigated topic in the field of acoustic in recent years. Many articles and projects describe fundamental problems of LRS design, numerical simulation, and laboratory measurements. However, there is a noticeable knowledge gap between laboratory prototypes and the mass production (development for a wide-scale implementation) of metamaterials structures. In general, the LRS prototypes require specific boundary conditions, for example, equal spacing between the individual resonators and separate attachment of each resonator to its base. These conditions allow for many simplifications in calculations. At the same time, these boundary conditions create a problem when it comes to the mass production of the LRS structures. Creating a connection between adjacent resonators would allow easier postprocessing of structures ex. attaching the structure to the base and keeping specified distances between resonators. This project investigates the possibilities of creating connections between adjacent unit cells and their influence on the simulation and measurement results. The effect on the simulated band gaps and sound transmission loss is investigated at the stage of numerical simulations. The prototypes of structures are 3D printed and tested. The laboratory measurement results are compared with simulations and further discussed.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
2022
detail.hit.zdb_id:
1461063-2
Bookmarklink
