@article {PERIN:2024:0736-2935:3548,
title = "Characterization of the scattered pressure from a cylindrical shell close to a free surface and understanding of the depth-dependent phenomenon",
journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings",
parent_itemid = "infobike://ince/incecp",
publishercode ="ince",
year = "2024",
volume = "270",
number = "8",
publication date ="2024-10-04T00:00:00",
pages = "3548-3559",
itemtype = "ARTICLE",
issn = "0736-2935",
url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2024/00000270/00000008/art00062",
doi = "doi:10.3397/IN_2024_3341",
author = "PERIN, Ana{\"ı}s and LEON, Fernand and CHATI, Farid and MAXIT, Laurent and MEYER, Valentin and DUTTO, Patrick",
abstract = "The characterization of the scattered pressure field of a submerged cylindrical target is of interest for underwater acoustics applications. The aim of this work is to study the vibroacoustic behavior of an immersed cylindrical shell excited by a plane wave, particularly in close proximity
to a free surface. To achieve this goad, finite element simulation and experimental investigation are carried out on a mock-up. The effect of the free surface is highlighted by comparing results to those obtained in a free field situation, in both time and frequency domains. Additional echoes
are observed on the time signals due to the presence of the free surface. In fact, after being scattered by the target, these echoes reflect on the surface, implying a time shift between echoes directly from the target and those that have travelled a longer path. The spectrum is also impacted
as the form function shows additional oscillations. These observations are depth-dependent. To determine wave trajectories, a study based on flight time and ray theory is conducted.",
}