NTRS - NASA Technical Reports Server

Back to Results
Sound radiation from randomly vibrating beams of finite circular cross sectionThe radiation of sound from vibrating cylindrical beams is analyzed based on the frequency of the beam vibrations and the physical characteristics of the beam and its surroundings. A statistical analysis of random beam vibrations allows this result to be independent of the boundary conditions at the ends of the beam. The acoustic power radiated by the beam can be determined from a knowledge of the frequency band vibration data without a knowledge of the individual modal vibration amplitudes. A practical example of the usefulness of this technique is provided by the application of the theoretical calculations to the prediction of the octave band acoustic power output of the picking sticks of an automatic textile loom. Calculations are made of the expected octave band sound pressure levels based on measured acceleration data. These theoretical levels are subsequently compared with actual sound pressure level measurements of loom noise.
Document ID
Document Type
Conference Paper
Sutterlin, M. W.
(Bolt, Beranek, and Newman, Inc. Cambridge, MA, United States)
Pierce, A. D.
(Ga. Inst. of Technol.)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Publication Information
Publication: NASA. Langley Res. Center Advan. in Eng. Sci., Vol. 3
Subject Category
Structural Mechanics
Distribution Limits
Work of the US Gov. Public Use Permitted.

Available Downloads

NameType 19770003385.pdf STI

Related Records

IDRelationTitle19770003363Analytic PrimaryAdvances in Engineering Science, Volume 3