Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/106424
Title: | Wavenumber domain analyses of vibro-acoustic decoupling and noise attenuation in a plate-cavity system enclosed by an acoustic black hole plate | Authors: | Wang, X Ji, H Qiu, J Cheng, L |
Issue Date: | Jul-2019 | Source: | Journal of the Acoustical Society of America, July 2019, v. 146, no. 1, p. 72-84 | Abstract: | The acoustic black hole (ABH) effect is realized in thin plate structures with a decreasing thickness according to a power-law function, and offers potential applications for structure vibration damping enhancement and free-field noise radiation suppression. In this paper, a wavenumber domain method (WNDM) is proposed for the analysis of vibro-acoustic coupling and internal noise reduction mechanism of a pentahedral cavity enclosed by a flexible plate with a two-dimensional ABH indentation, subject to a point force excitation. The system response of the ABH plate-cavity is computed by a validated finite element model. The relationship between the space-averaged sound energy inside the cavity and the spectra of the structural displacement and the acoustic mode of the cavity is established. This allows revealing a dual physical mechanism behind the observed noise reduction: amplitude reduction and mismatching between the wavenumber spectra of the plate displacement and the acoustic field, which results in a weakened vibro-acoustic coupling. An additional configuration with an ABH embedded in an irregular pentagonal wall of the cavity is examined. Despite the increasing complexity in the geometry of the coupling interface and its coupling with the cavity, numerical analyses confirm the generality of the observed physical phenomena and the applicability of the proposed WNDM to more complex system configurations. | Publisher: | AIP Publishing LLC | Journal: | Journal of the Acoustical Society of America | EISSN: | 0001-4966 | DOI: | 10.1121/1.5114821 | Rights: | © 2019 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in Xiaodong Wang, Hongli Ji, Jinhao Qiu, Li Cheng; Wavenumber domain analyses of vibro-acoustic decoupling and noise attenuation in a plate-cavity system enclosed by an acoustic black hole plate. J. Acoust. Soc. Am. 1 July 2019; 146 (1): 72–84 and may be found at https://doi.org/10.1121/1.5114821. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
72_1_online.pdf | 4.28 MB | Adobe PDF | View/Open |
Page views
7
Citations as of Jun 30, 2024
SCOPUSTM
Citations
35
Citations as of Jul 4, 2024
WEB OF SCIENCETM
Citations
30
Citations as of Jul 4, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.