IN a previous paper by the author (‘The Calculation of Frequencies of Vibration of a Truncated Cone’, AIRCRAFT ENGINEERING, Vol. XVIII, July 1946, pp. 235–236) expressions for the fundamental frequencies of longitudinal, flexual and torsional vibrations were obtained. The methods used have now been extended to include the vibrations of truncated pyramids encastré at one end and free at the other, and the results obtained are given in this paper. Special attention is given to the pyramids having equilateral triangle and square cross‐sections.
Conway, H.D. (1948), "Calculation of Frequencies of Truncated Pyramids: Development of the Theories for the Longitudinal, Flexural and Torsional Vibrations of a Truncated Cone", Aircraft Engineering and Aerospace Technology, Vol. 20 No. 5, pp. 148-148. https://doi.org/10.1108/eb031635
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