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Mechanical Impedance Approach to Engine Vibration Transmission Into an Aircraft Fuselage
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English
Abstract
The paper demonstrates a mechanical impedance approach to an aircraft vibration problem. The desire is to reduce cabin noise resulting from fuselage vibration generated by engine rotor unbalance disturbances. A simplified analytical model is used in combination with experimental impedance data to investigate the effectiveness of several schemes applied to the engine/airframe interface. Airframe vibration absorbers are found to be the most effective. Qualitative correlation is achieved with the results of the installation of absorbers on the Douglas DC-9 aircraft. A more comprehensive analytical model is generated to account for three-dimensional effects; data acquistion for this model is discussed.
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Authors
Citation
Rubin, S. and Biehl, F., "Mechanical Impedance Approach to Engine Vibration Transmission Into an Aircraft Fuselage," SAE Technical Paper 670873, 1967, https://doi.org/10.4271/670873.Also In
References
- Van Dyke J. D. Jr. Schendel J. W. Gunderson C. O. Ballard M. R. “Cabin Noise Reduction in the DC-9.” Paper 67-401 AIAA Commercial Aircraft Design Meeting June 1967
- Molloy C. T. “Four Pole Parameters in Vibration Analysis.” Colloquium on Mechanical Impedance Methods for Mechanical Vibration, Transactions ASME 80 1958 43 68
- Rubin S. “Review of Mechanical Immittance and Transmission Concepts,” J. of the Acoustical Society of America 41 5 1967
- Harris C.M. Crede C. E. “Shock and Vibration Handbook.” Chapter VI F. E. Reed New York McGraw-Hill Book Co., Inc. 1961