A STUDY OF THE CHARACTERISTICS OF MODERN ENGINE NOISE AND THE RESPONSE CHARACTERISTICS OF STRUCTURES
LOCKHEED AIRCRAFT CORP BURBANK CA
Pagination or Media Count:
Jet engine noise and the response of structures to that noise were studied. The near sound field characteristics of a jet engine operating on the ground at both military and afterburner thrust measured. Sound pressure levels were obtained in the near field and within the jet wake. Pressure levels and cross-correlation coefficients were obtained in near field and within the jet wake. Pressure levels and cross-correlation coefficients were obtained at two locations in the noise field for the free field, a rigid boundary and a flexible boundary. Several panels, representative of typical airframe structure, were subjected to this jet engine noise environment. Structural response in terms of strain and accelerations was measured and analyzed. These panels were also subjected to discrete frequency excitation to determine basic response parameters. An analytical method for the prediction of response of complex structures in an actual jet noise environment was developed. Predicted and measured responses were compared.
- Noise Pollution and Control
- Terminal Flight Facilities