Title

Effect of Longitudinal Stringers on Sound Transmission into a Thin Cylindrical Shell

Abstract

In the context of the transmission of airborne noise into an aircraft fuselage, a mathematical model is presented fore the transmission of airborne noise into a stiffened cylindrical shell. The stiffeners are longitudinal stringers and are modeled as discrete structural elements. The numerical cases examined were typical of a narrow-bodied jet transport fuselage. The stringers appeared to raise the cylindrical transmission loss in the mass-controlled region, although they produced dips at the stringer resonances. The ring-frequency dip in transmission loss, which is characteristic of monocoque shells, was found to still be present. There appeared to be a small increase in transmission loss as the number of stringers was increased. The effect of high damping was also investigated.

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1978 American Institute of Aeronautics and Astronautics (AIAA), All rights reserved.


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