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Proceedings Paper

Vibration and instability of spinning thin-walled beams featuring anisotropy and pretwist incorporating adaptive capabilities
Author(s): Ohseop Song; Liviu I. Librescu
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Paper Abstract

An integrated dual approach aiming at controlling the dynamic behavior of anisotropic pretwisted beams rotating with constant angular speed about their longitudinal body axis fixed in the inertial space is presented. The approach is based upon the simultaneous implementation and use of the directionality property featured by the composite materials and of adaptive material systems technology. While the former control technique uses the anisotropy properties of the advanced composite material structures, the latter one exploits the actuating capabilities provided by the piezoelectric materials which are bonded or embedded into the host structure. A dynamic control law relating the piezoelectrically induced boundary bending moments with conveniently selected dynamic response characteristics of the structure is implemented, and its results upon the closed-loop eigenfrequencies of spinning beams are highlighted.

Paper Details

Date Published: 24 July 1998
PDF: 12 pages
Proc. SPIE 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures, (24 July 1998); doi: 10.1117/12.316322
Show Author Affiliations
Ohseop Song, Chungnam National Univ. (South Korea)
Liviu I. Librescu, Virginia Polytechnic Institute and State Univ. (United States)

Published in SPIE Proceedings Vol. 3323:
Smart Structures and Materials 1998: Mathematics and Control in Smart Structures
Vasundara V. Varadan, Editor(s)

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