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Structure-borne noise control for propeller aircraftA laboratory test apparatus was developed which would allow the study and development of propeller wake/vortex-induced structure-borne interior noise control measures. Various methods of wing structural modification, including blocking masses, surface damping treatments, and tuned mechanical absorbers, were evaluated relative to reduced interior noise levels. Inboard wing fuel was found to act as an effective blocking mass. Wing panel add-on damping treatment in the form of a single, constrained layer was not an effective control measure, except in the area of the propeller wake. However, highly damped, tuned mechanical absorbers were found to be the most efficient structure-borne noise (SBN) control measure.
Document ID
19880029314
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Unruh, James F.
(Southwest Research Institute San Antonio, TX, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1987
Subject Category
Acoustics
Report/Patent Number
AIAA PAPER 87-2680
Accession Number
88A16541
Funding Number(s)
CONTRACT_GRANT: NAS1-17921
Distribution Limits
Public
Copyright
Other

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