Control of low-frequency cabin noise is a difficult problem in all commercial aircraft. The subject is analyzed in terms of the response of a pressurized fuselage structure subjected to broadband random pressure fluctuations. It is shown that in the so called 'stiffness controlled' region, the structural response and noise transmission may be governed by the resonances of the stiffeners, with the skin acting like an attached mass. As a result, cabin noise at low frequencies may be reduced by application of constrained viscoelastic damping treatments on the stringers and frames of the fuselage. (Peters)
Reduction of cabin noise during cruise conditions by stringer and frame damping
Reduzierung des Kabinengeraeusches unter Flugbedingung durch Holm- und Rahmendaempfung
AIAA Journal ; 17 , 3 ; 229-236
1979
8 Seiten, 13 Bilder, 15 Quellen
Article (Journal)
English
Frame type lifting beam of luxury cruise ship prefabricated cabin
European Patent Office | 2021
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