@article {RAHARIMANANA:2024:0736-2935:1144,
title = "Design of lightweight aircraft trim panel with a high sound transmission loss",
journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings",
parent_itemid = "infobike://ince/incecp",
publishercode ="ince",
year = "2024",
volume = "270",
number = "10",
publication date ="2024-10-04T00:00:00",
pages = "1144-1155",
itemtype = "ARTICLE",
issn = "0736-2935",
url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2024/00000270/00000010/art00017",
doi = "doi:10.3397/IN_2024_2789",
author = "RAHARIMANANA, Tiffany and SIMON, Frank and SEBBANE, Delphine and ELIA, Pautard",
abstract = "The trim panels of aircraft cabin are frequently made up of multilayer materials including a honeycomb, typically in the form of sandwich panels, which have the advantage of being lightweight and space-saving, but lack good acoustic insulation. It has been shown that, for 10% more mass,
weights arranged in a fractal pattern in the honeycomb affect the vibratory pattern of a sandwich panel by creating multiple reflections of the bending waves on the inclusions. They thus generate a phenomenon of focusing vibratory waves providing localized modes while attenuating the structure's
acoustic radiation. The objectives of this paper are to describe: first, the vibro-acoustic model of an overloaded homogenized bending panel (to mimic a trim panel with a fractal pattern); second, the physical phenomena associated to this concept; third, the impact on the modal behavior and
the vibratory and acoustic responses.",
}