An analytical model for study of interior noise control for high-speed, propeller-driven aircraft

Revell, J. D.; Balena, F. J.; Koval, L. R.

doi:10.2514/6.1980-1000

Cited by 2 publications

(1 citation statement)

References 1 publication

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“…l A description of the analytic method used for interior noise predictions is presented in a companion paper. 2 An interior noise goal of 80 dBA was selected, since this level was considered competitive with the quietest turbofan aircraft in service at this time. The acoustical treatment mass penalties required to achieve this goal were calculated for three propfan-powered aircraft designed for Mach 0.8 cruise at an altitude of 30,000 ft.…”

Section: Introductionmentioning

confidence: 99%

Interior Noise Control by Fuselage Design for High-speed Propeller-Driven Aircraft

Revell¹,

Balena²,

Koval

1982

Journal of Aircraft

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An analytic study was performed to define the acoustical treatment weight penalties that are required to provide an interior noise level of 80 dBA in propfan-powered aircraft at Mach 0.8 cruise. The prediction method, described in a companion paper, combines Koval's theory for cylindrical shell noise transmission loss (TL) with Beranek and Work's method for multilayered acoustic treatment analyses. Three fuselage diameters are studied which represent commuter, narrow-body, and wide-body aircraft. The calculated acoustic treatment weight penalties range from 1.7 to 2.4% of aircraft takeoff gross weight (TOGW) for add-on designs. Advanced noise reduction designs, those which permit structural modifications, reduce the acoustic treatment weight penalties to 1.5% TOGW for aluminum aircraft and from 0.74 to 1.4% TOGW for composite fuselage construction. The wide-body results agree with the weight penalty estimates of an earlier turboprop aircraft study.

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Section: Introductionmentioning

confidence: 99%

Interior Noise Control by Fuselage Design for High-speed Propeller-Driven Aircraft

Revell¹,

Balena²,

Koval

1982

Journal of Aircraft

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Attenuation of Propeller-Related Vibration and Noise

Johnston

Donham

1982

Journal of Aircraft

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The potential sources and paths by which the propeller produces structural responses resulting in vibration and noise in the cabin of a transport aircraft are discussed. New low-cost, convenient experimental and analytical techniques are described for evaluating the excitations-propeller airborne pressures on the fuselage shells, slip-stream-induced forces on the wing and tail, and oscillatory forces on the propeller. The techniques described make use of ground-determined structural signatures to relate forces with vibrations or noise, and of propeller signatures from flight tests which define the vibroacoustic contributions of individual propellers. Knowing these, the propeller-produced excitation forces can be deduced by the relations shown; design approaches to control the fatigue and vibroacoustic environment can then be enunciated logically.

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An analytical model for study of interior noise control for high-speed, propeller-driven aircraft

Cited by 2 publications

References 1 publication

Interior Noise Control by Fuselage Design for High-speed Propeller-Driven Aircraft

Interior Noise Control by Fuselage Design for High-speed Propeller-Driven Aircraft

Attenuation of Propeller-Related Vibration and Noise

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