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Sound transmission through aircraft panels
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2005 (English)Licentiate thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH , 2005. , 13 p.
Series
Trita-AVE, ISSN 1651-7660 ; 2005:16
Keyword [en]
sound transmission loss, stiffener, stiffening, aircraft panel, cylindrical shell
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-494OAI: oai:DiVA.org:kth-494DiVA: diva2:14212
Note
QC 20101209Available from: 2005-11-22 Created: 2005-11-22 Last updated: 2011-10-05Bibliographically approved
List of papers
1. Sound transmission through curved aircraft panels with stringers and ring frames attachments
Open this publication in new window or tab >>Sound transmission through curved aircraft panels with stringers and ring frames attachments
2007 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Journal of sound and vibration, Vol. 300, no 3-5, 949-973 p.Article in journal (Refereed) Published
Abstract [en]

A numerical approach based on a receptance method has been developed to evaluate the airborne sound insulation of aircraft panels with stringer and ring frame attachments. Theoretical predictions have been compared with laboratory measurements conducted on both model structures and aircraft panels. Certain parameters were varied in this study to gauge stiffener effects on sound transmission through the panel. For large curved aircraft panels studied here, it was found that the ring frames have little influence on sound transmission loss in the frequency range of interest. However, the stringers may have considerable influence on the sound transmission loss. The stringer improves the sound transmission loss for a curved panel in the vicinity of the ring frequency, but may result in a potential deterioration above this frequency. In addition it was found that the sound transmission loss for the composite skin attached with composite stringers was lower than that of the metallic panel attached with metallic stringers. The results suggest that acoustical optimization design for the stringers is necessary to achieve improved airborne sound insulation for aircraft panels

Keyword
Acoustic variables measurement, Aircraft parts and equipment, Numerical methods, Optimization, Sound insulation, Structural panels
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:kth:diva-6123 (URN)10.1016/j.jsv.2006.09.008 (DOI)000243561200030 ()2-s2.0-33845885801 (Scopus ID)
Note
QC 20100908Available from: 2006-09-15 Created: 2006-09-15 Last updated: 2012-03-23Bibliographically approved
2. Influence of overpressure on sound transmission through curved panels
Open this publication in new window or tab >>Influence of overpressure on sound transmission through curved panels
2007 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Journal of sound and vibration, Vol. 302, no 4-5, 760-776 p.Article in journal (Refereed) Published
Abstract [en]

A great deal of recent research related to the aeronautic industry has been devoted to the theoretical study of sound transmission through fuselage structures. However, the literature records few test data with reference to the influence of overpressure on sound transmission. In this article, the airborne sound transmission through curved panels under the condition of overpressure at the concave side has been investigated experimentally and it is shown that experimental results agree well with a theoretical prediction due to an infinite cylindrical shell model at relatively high frequencies. Discrepancies, which occur at lower frequencies, can be explained, inter alia, by the influence of the finite size and attached stiffeners of the panel.At frequencies higher than the corresponding ring frequency for the curved panel, both experimental and theoretical predictions reveal that the overpressure at the concave side tends to reduce the sound transmission loss at the rate of about 0.5dB/10000Pa. While at lower frequencies, say well below the ring frequency, the overpressure may increase or reduce sound transmission loss of a finite panel depending on the shift of resonant frequencies resulting from the overpressure.

Keyword
thin cylindrical-shell, acoustic behavior, prestress, stringers
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-6124 (URN)10.1016/j.jsv.2006.12.014 (DOI)000245508700009 ()2-s2.0-33947222075 (Scopus ID)
Note
QC 20100908Available from: 2006-09-15 Created: 2006-09-15 Last updated: 2012-03-23Bibliographically approved
3. Influence of baffle size and curvature on sound radiated by vibrating panels
Open this publication in new window or tab >>Influence of baffle size and curvature on sound radiated by vibrating panels
2004 (English)In: Eleventh International Congress on Sound and Vibration, 2004Conference paper, Published paper (Other academic)
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-8783 (URN)
Conference
Eleventh International Congress on Sound and Vibration , 5-8 Juli 2004, S:t Petersburg, Ryssland
Note
QC 20101209Available from: 2005-11-22 Created: 2005-11-22 Last updated: 2012-03-23Bibliographically approved
4. Sound transmission through a double walled cylindrical shell
Open this publication in new window or tab >>Sound transmission through a double walled cylindrical shell
2003 (English)In: Tenth International Congress on Sound and Vibration, 2003Conference paper, Published paper (Other academic)
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-8784 (URN)
Conference
Tenth International Congress on Sound and Vibration, 7-10 Juli 2003, Stockholm, Sverige
Note
QC 20101209Available from: 2005-11-22 Created: 2005-11-22 Last updated: 2011-10-05Bibliographically approved

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
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Output format
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