This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Experimental Study of Propeller - Induced Structural Vibration and Interior Noise
Annotation ability available
Sector:
Language:
English
Abstract
This paper presents results of tests conducted to study fuselage sidewall dynamics and their effects on the cabin interior noise of a twin-engine, propeller-driven, light aircraft. Data on the dynamic behavior were obtained by slowly sweeping the RPM of one of the engines while the aircraft was stationary on the ground. This technique allowed frequency response plots of the sidewall structural accelerations to be obtained. These accelerations are compared to similar results from a test using a mechanical shaker in order to evaluate the structural dynamic response caused by the harmonics of the propeller blade passage tone. The dynamic response of the fuselage sidewall is also discussed as a noise transmission mechanism. A second mechanism for noise transmission through the fuselage sidewall was investigated by opening the copilot's window. The results illustrate the complex nature of the noise transmission mechanisms and the importance of correctly assessing noise paths.
Authors
Topic
Citation
Howlett, J. and Schoenster, J., "An Experimental Study of Propeller - Induced Structural Vibration and Interior Noise," SAE Technical Paper 790625, 1979, https://doi.org/10.4271/790625.Also In
References
- Catherines John J. Mayes William H. “Interior Noise Levels of Two Propeller-Driven, Light Aircraft.” NASA TM X-72716 July 1975
- Catherines John J. Jha Sunil K. “Sources and Characteristics of Interior Noise in General Aviation Aircraft.” NASA TM X-72839 April 1976
- Jha S. K. Catherines J. J. “Interior Noise Studies for General Aviation Types of Aircraft, Part 1: Field Studies.” J. Sound and Vib. 58 3 375 390 June 1978
- Jha S. J. Catherines J. J. “In terior Noise Studies for General Aviation Types of Aircraft, Part II: Laboratory Studies.” J. Sound and Vib. 58 3 391 406 June 1978
- Howlett James T. Williams Louise H. Catherines John J. Jha Sunil K. “Measurement, Analysis, and Prediction of Aircraft Interior Noise.” AIAA 3rd Aeroacoustics Conference, Paper No. 76-551 July 1976
- Mixson John S. Barton C. Kearney Vaicaitis Rimas “Interior Noise Analysis and Control for Light Aircraft.” SAE Business Aircraft Meeting Wichita, Kansas Paper 770445 April 1977
- Dowell E. H. “Acoustoelasticity.” NASA CR-145110 July 1977
- Vaicaitis Rimas “Noise Transmission by Viscoelastic Sandwich Panels,” NASA TN D-8516 August 1977
- McDonald Wayne B. Vaicaitis Rimas Myers Michael K. “Noise Transmission Through Plates Into an Enclosure,” NASA TP-1173 May 1978
- Mixson John S. Barton C. Kearney Vaicaitis Rimas “Investigation of Interior Noise in a Twin-Engine Light Aircraft,” J. Aircraft 15 4 227 233 April 1978
- Nefske Donald J. Howell Larry J. “Automobile Interior Noise Reduction Using Finite Element Methods.” Paper 780365 , SAE Congress and Exposition Detroit March 1978