Noise radiated from a periodically stiffened cylindrical shell excited by a turbulent boundary layer

Maxit, L; Guasch, O; Meyer, V; Karimi, M

Noise radiated from a periodically stiffened cylindrical shell excited by a turbulent boundary layer

Maxit, L Guasch, O Meyer, V Karimi, M

Permalink

Publication Type:: Journal Article
Citation:: Journal of Sound and Vibration, 2020, 466
Issue Date:: 2020-02-03

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

The embargo period expires on 2 Oct 2021

Adobe PDF

Download full textAdobe PDF (3.3 MB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Maxit, L	en_US
dc.contributor.author	Guasch, O	en_US
dc.contributor.author	Meyer, V	en_US
dc.contributor.author	Karimi, M https://orcid.org/0000-0002-2949-5364	en_US
dc.date.issued	2020-02-03	en_US
dc.identifier.citation	Journal of Sound and Vibration, 2020, 466	en_US
dc.identifier.issn	0022-460X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/136806
dc.description.abstract	© 2019 Elsevier Ltd This work proposes a semi-analytical method to model the vibroacoustic behavior of submerged cylindrical shells periodically stiffened by axisymmetric frames and excited by a homogeneous and fully developed turbulent boundary layer (TBL). The process requires the computation of the TBL wall-pressure cross spectral density function and the sensitivity functions for stiffened cylindrical shells. The former is deduced from an existent TBL model and the latter are derived from a wavenumber-point reciprocity principle and a spectral formulation of the problem. The stiffeners' dynamic behavior is introduced in the formulation through circumferential admittances that are computed by a standard finite element code using shell elements. Four degrees of freedom are taken into account for the coupling between the shell and the stiffeners: three translation directions and one tangential rotation. To investigate the effect of the stiffeners on the radiated noise, two case studies are considered. The first one examines a fluid-loaded cylindrical shell with regularly spaced simple supports. The influence of Bloch-Floquet waves and the support spacing on the noise radiation are highlighted. The second case study inspects the fluid-loaded cylindrical shell with two different periodic ring stiffeners, namely stiffeners with T-shaped and I-shaped cross-sections. Their influence on the vibroacoustics of the shell is thoroughly analyzed.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DE190101412
dc.relation.ispartof	Journal of Sound and Vibration	en_US
dc.relation.isbasedon	10.1016/j.jsv.2019.115016	en_US
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject.classification	Acoustics	en_US
dc.title	Noise radiated from a periodically stiffened cylindrical shell excited by a turbulent boundary layer	en_US
dc.type	Journal Article
utslib.citation.volume	466	en_US
utslib.for	02 Physical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2021-10-02T00:00:00+1000
pubs.publication-status	Published	en_US
pubs.volume	466	en_US

Abstract:

© 2019 Elsevier Ltd This work proposes a semi-analytical method to model the vibroacoustic behavior of submerged cylindrical shells periodically stiffened by axisymmetric frames and excited by a homogeneous and fully developed turbulent boundary layer (TBL). The process requires the computation of the TBL wall-pressure cross spectral density function and the sensitivity functions for stiffened cylindrical shells. The former is deduced from an existent TBL model and the latter are derived from a wavenumber-point reciprocity principle and a spectral formulation of the problem. The stiffeners' dynamic behavior is introduced in the formulation through circumferential admittances that are computed by a standard finite element code using shell elements. Four degrees of freedom are taken into account for the coupling between the shell and the stiffeners: three translation directions and one tangential rotation. To investigate the effect of the stiffeners on the radiated noise, two case studies are considered. The first one examines a fluid-loaded cylindrical shell with regularly spaced simple supports. The influence of Bloch-Floquet waves and the support spacing on the noise radiation are highlighted. The second case study inspects the fluid-loaded cylindrical shell with two different periodic ring stiffeners, namely stiffeners with T-shaped and I-shaped cross-sections. Their influence on the vibroacoustics of the shell is thoroughly analyzed.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/136806