Vibration and instability of spinning thin-walled beams featuring anisotropy and pretwist incorporating adaptive capabilities

Ohseop Song; Liviu I. Librescu

doi:10.1117/12.316322

24 July 1998 Vibration and instability of spinning thin-walled beams featuring anisotropy and pretwist incorporating adaptive capabilities

Ohseop Song, Liviu I. Librescu

Author Affiliations +

Proceedings Volume 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures; (1998) https://doi.org/10.1117/12.316322
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

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.

Citation Download Citation

Ohseop Song and Liviu I. Librescu "Vibration and instability of spinning thin-walled beams featuring anisotropy and pretwist incorporating adaptive capabilities", Proc. SPIE 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures, (24 July 1998); https://doi.org/10.1117/12.316322

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