Noise Transmission Characteristics of Aircraft-Type Composite Panels

Format:

Conference/Event

Author/Creator:

Metcalf, Vern L., author.

Conference Name:

General Aviation Aircraft Meeting and Exposition (1985-04-16 : Wichita, Kansas, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1985

Summary:

The noise transmission loss characteristics of 28 flat, fiber reinforced, composite panels and 4 aluminum panels, with dimensions of 24.1 cm by 40.6 cm, have been experimentally investigated in the NASA Langley Research Center noise transmission loss apparatus. To support the acoustic data, modal frequencies and modal damping for several mode shapes of each of the test panels were extracted experimentally, using impulse testing with a Computer Aided Test system. It was determined that the modal frequencies and damping ratios are affected by the fiber orientation in the composite panel. The transmission loss of composite panels is compared with that of aluminum panels of equal critical shear load. The effects of applying structural foam and damping material are indicated

Notes:

Vendor supplied data

Publisher Number:

850878

Access Restriction:

Restricted for use by site license