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Shock and Vibration
Volume 3 (1996), Issue 4, Pages 269-278
http://dx.doi.org/10.3233/SAV-1996-3405

Spatially Filtered Vibration Control of Cylindrical Shells

H.S. Tzou1 and J.P. Zhong2

1Department of Mechanical Engineering, University of Kentucky, Lexington, KY 40506-0108, USA
2United Technologies Carrier Co., Syracuse, NY, USA

Received 23 January 1995; Accepted 13 October 1995

Copyright © 1996 Hindawi Publishing Corporation. 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

Distributed actuators offer spatially distributed actuations and they are usually effective to multiple modes of a continuum. Spatially filtered distributed vibration controls of a laminated cylindrical shell and a piezoelectric shell are investigated, and their control effectivenesses are evaluated in this study. In general, there are two control actions, the in-plane membrane control forces and the counteracting control moments, induced by the distributed actuator in the laminated shell. There is only an in-plane circumferential control force in the piezoelectric shell. Analyses suggest that in either case the control actions are effective in odd natural modes and ineffective in even modes. Spatially filtered control effectiveness and active damping of both shells are studied.