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RESEARCH PAPERS: Vibrations Papers

The Effects of Shear Deformation and Rotary Inertia on the Lateral Frequencies of Cantilever Beams in Bending

[+] Author and Article Information
W. Carnegie, J. Thomas

University of Surrey, Surrey, England

J. Eng. Ind 94(1), 267-278 (Feb 01, 1972) (12 pages) doi:10.1115/1.3428121 History: Received June 04, 1971; Online July 15, 2010

Abstract

This paper deals with the effect of shear deformation and rotary inertia on the frequencies of flexural vibration of pre-twisted and non-pre-twisted uniform and tapered cantilever beams. The equations of motion are derived and transformed into a set of linear simultaneous algebraic equations by using finite-difference solutions for the derivatives. The resulting eigenvalue matrix equation is solved for the frequency parameters by a QR transformation. The effects of various tapers, depth-to-length ratios and pre-twist angles on the frequencies of vibration are investigated for the first five modes. Results obtained are compared with those presented by other investigators where available and show good agreement. The experimental results presented also show good agreement with the corresponding theoretical values.

Copyright © 1972 by ASME
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