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Shock and Vibration
Volume 2014, Article ID 123271, 10 pages
http://dx.doi.org/10.1155/2014/123271
Research Article

Vibration and Instability of Rotating Composite Thin-Walled Shafts with Internal Damping

College of Mechanical and Electronic Engineering, Shandong University of Science & Technology, Qingdao 266590, China

Received 21 May 2014; Accepted 3 July 2014; Published 17 August 2014

Academic Editor: Mohammad Elahinia

Copyright © 2014 Ren Yongsheng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The dynamical analysis of a rotating thin-walled composite shaft with internal damping is carried out analytically. The equations of motion are derived using the thin-walled composite beam theory and the principle of virtual work. The internal damping of shafts is introduced by adopting the multiscale damping analysis method. Galerkin’s method is used to discretize and solve the governing equations. Numerical study shows the effect of design parameters on the natural frequencies, critical rotating speeds, and instability thresholds of shafts.