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Record Details

Record 30 of 7656
Structure-borne noise control for propeller aircraft
Author and Affiliation:
Unruh, James F.(Southwest Research Institute, San Antonio, TX, United States)
Abstract: A 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.
Publication Date: Oct 01, 1987
Document ID:
19880029314
(Acquired Nov 28, 1995)
Accession Number: 88A16541
Subject Category: ACOUSTICS
Report/Patent Number: AIAA PAPER 87-2680
Document Type: Preprint
Publisher Information: United States
Contract/Grant/Task Num: NAS1-17921
Financial Sponsor: NASA; United States
Organization Source: Southwest Research Inst.; San Antonio, TX, United States
Description: 8p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: AIRCRAFT NOISE; NOISE REDUCTION; PROPELLER DRIVE; VORTICES; WINGS; DAMPERS; ELASTOMERS; LEADING EDGES; VIBRATION DAMPING
Imprint And Other Notes: AIAA, Aeroacoustics Conference, 11th, Sunnyvale, CA, Oct. 19-21, 1987. 8 p.
Availability Source: Other Sources
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