V. Kehr-Candille, R. Ohayon

Concerning the problem of internal, "low-frequency", noise reduction for aeronautical structures, we can distinguish: -noise reduction by passive systems, with dissipative layers, (thin or thick layers), on the interface gaz-structure. -noise reduction by active systems. This paper deals with the first point, for very thin layers, using direct finite element analysis of the structural-acoustic coupled system, and alternative reduction modal methods adapted to dissipative interface damping. Numerical results are presented for both analysis in order to show the feasability, the versatility and the accuracy of the modal projection analysis.

DGLR/AIAA 14th Aeroacoustics Conference, 1992

Conference Paper

englisch

21,0 x 29,7 cm, 7 Seiten

DGLR-Bericht, 1992, 1992-03, DGLR/AIAA 14th Aeroacoustics Conference - Proceedings; S.701-707; 1992; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

aeroacoustics

Bibliothek

1992