Publication Date:
2019-07-13
Description:
Composite structures are often used in aircraft because of the advantages offered by a high strength to weight ratio. However, the acoustical properties of these light and stiff structures can often be less than desirable resulting in high aircraft interior noise levels. In this paper, measurements and predictions of the transmission loss of a curved honeycomb composite panel are presented. The transmission loss predictions are validated by comparisons to measurements. An assessment of the behavior of the panel is made from the dispersion characteristics of transverse waves propagating in the panel. The speed of transverse waves propagating in the panel is found to be sonic or supersonic over the frequency range from 100 to 5000 Hz. The acoustical benefit of reducing the wave speed for transverse vibration is demonstrated.
Keywords:
Aircraft Design, Testing and Performance
Type:
AIAA Paper 2003-3157
,
9th AIAA/CEAS Aeroacoustics Conference and Exhibition; May 12, 2003 - May 14, 2003; Hilton Head, SC; United States
Format:
application/pdf
