Negative refraction of elastic waves in 2D phononic crystals: Contribution of resonant transmissions to the construction of the image of a point source

Autor: Anne-Christine Hladky-Hennion, Charles Croënne, Bertrand Dubus, Jérôme Vasseur, Lionel Haumesser, Dimitri Manga, Bruno Morvan

Publikováno v: AIP Advances, Vol 1, Iss 4, Pp 041405-041405-8 (2011)

Negative refraction properties of a two-dimensional phononic crystal (PC), made of a triangular lattice of steel rods embedded in epoxy are investigated both experimentally and numerically. First, experiments have been carried out on a prism shaped P

Externí odkaz: https://doaj.org/article/473131d87a994c6ab3f615f731aea4e4

An optimal dimensioning method of a green wall structure for noise pollution reduction

Autor: Bertrand Dubus, Emmanuel Attal, Thérèse Leblois, Bernard Cretin

Publikováno v: Building and Environment
Building and Environment, 2021, 187, pp.107362. ⟨10.1016/j.buildenv.2020.107362⟩
Building and Environment, Elsevier, 2021, 187, pp.107362. ⟨10.1016/j.buildenv.2020.107362⟩

International audience; This paper concern the optimization of a multilayered green wall structure including substrate and foliage in order to reduce as much as possible backward noise reflection and forward transmission from the wall. Each component

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c05feb235105baa738413190902e0fb1
https://hal.science/hal-03309605/document

Electrical Evidence of the Tunable Electrical Bragg Bandgaps in Piezoelectric Plates

Autor: Mai Pham Thi, Claude Prevot, Anne-Christine Hladky-Hennion, Charles Croënne, Jérôme Vasseur, Clement Vasseur, Bertrand Dubus

Publikováno v: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2018, 65 (9), pp.1552-1562. ⟨10.1109/TUFFC.2018.2847246⟩
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2018, 65 (9), pp.1552-1562. ⟨10.1109/TUFFC.2018.2847246⟩

A piezoelectric plate, poled along its thickness and supporting on its top and bottom surfaces a periodic grating of electrodes, is considered. An analytical model allowing band structure calculation is derived for the first symmetrical mode propagat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16b925e63f48af8c7f4cb3c14d736ff7
https://doi.org/10.1109/tuffc.2018.2847246

Scattering from a finite ribbed plate with attached oscillators

Autor: Charles Croënne, Anne-Christine Hladky, Fernand Léon, Farid Chati, Mai Pham Thi, Dominique Décultot, Raphael Lardat, Michel Tran-Van-Nhieu, Laurent Divay, Gérard Maze, Bertrand Dubus

Publikováno v: Journal of the Acoustical Society of America
Journal of the Acoustical Society of America, Acoustical Society of America, 2018, 144 (2), pp.785-795. ⟨10.1121/1.5049933⟩
Journal of the Acoustical Society of America, 2018, 144 (2), pp.785-795. ⟨10.1121/1.5049933⟩

Double layer structures consisting of stainless steel and polymer rods are designed to blur and attenuate Bragg and Bloch-Floquet scattering from a periodically ribbed plate in a given frequency bandwidth. These structures can be considered as ribbed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb693062fecbcef6040651b5ffd98921
https://doi.org/10.1121/1.5049933

A Numerical Study of the Formation of a Conical Cavitation Bubble Structure at Low Ultrasonic Frequency

Autor: Christian Granger, Bertrand Dubus, Christian Vanhille, Cleofé Campos-Pozuelo

Publikováno v: Physics Procedia. 70:1070-1073

This paper presents a study of the formation of a conical bubble structure due to cavitation at 20 kHz in water. This analysis is performed by using the numerical code SNOW-BL, which solves the interaction of finite amplitude pressure waves and a pop

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::497edaa70fa7dacc4d95826279cee860