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Note on the Distortion Characteristics of Swept and Cranked Wings in Relation to Flutter and Other Aeroelastic Phenomena

Published online by Cambridge University Press:  28 July 2016

D. Williams
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Summary

The parts played by calculation, and by resonance tests on simplified scale models, in obtaining the normal modes of an aeroplane with wings of unorthodox plan forms are discussed on the basis that the normal modes are the best means of defining the elastic-inertia characteristics of an aircraft for the purpose of flutter investigations.

Methods of simplifying the model for ease and cheapness of construction are put forward.

The radical difference between the effects of shear-lag and of ordinary bending-shear flexibility is described, and an approximate method of allowing for the latter effect is indicated.

Type
Research Article
Information
The Aeronautical Journal , Volume 55 , Issue 482 , February 1951 , pp. 116 - 125
Copyright
Copyright © Royal Aeronautical Society 1951

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References

1. Anderson, R. A. and Houbolt, J. C. (1948). The Effect of Shear-Lag on Bending Vibration of Box-Beams. N.A.C.A. Tech. Note No. 1583, February 1948.Google Scholar
2. Williams, D. (1949). A Simple Method of Allowing for Shear Deflections in Calculating the Vibration Modes and Frequencies of Structures. R.A.E. Report No. Structures 49, August 1949 (to be published).Google Scholar
3. Frazer, R. A. and Duncan, W. J. (1928). The Flutter of Aeroplane Wings. (A.R.C. Monograph). R. & M. 1155, August 1928.Google Scholar