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Acoustic excitation of a panel having a central opening under biaxial tension

Published online by Cambridge University Press:  04 July 2016

P. K. Datta  and
R. G. White
P. K. Datta
Affiliation:
Indian Institute of Technology, Kharagpur
R. G. White
Affiliation:
Institute of Sound and Vibration Research, University of Southampton
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Extract

The behaviour of a thin tensioned sheet with an opening has been the subject of a number of recent investigations. In this type of problem, as in an aircraft structure, a skin carries all or some of the in-plane load as well as a lateral pressure load. Failure often results from the development of fatigue cracks which propagate from a stress concentration at the cut-out being subjected to structural vibration excited by acoustic pressure fluctuations. The Comet disaster in 1954 was due to the structural failure of the pressure cabin, brought about by the development of fatigue cracks from high stress concentration regions around the corners of the windows. The cases of statically tensioned, uniaxially and biaxi-ally loaded plates having a central crack subjected to acoustic excitation have been studied. These investigations were concerned with the basic features of plate vibration; i.e., mode shapes at a resonance frequency, the resonance frequency versus load behaviour and the crack propagation rates.

Type
Technical Note
Information
The Aeronautical Journal , Volume 84 , Issue 837 , October 1980 , pp. 339 - 345
Copyright
Copyright © Royal Aeronautical Society 1980 

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