Simultaneous Active Control of Flexural and Extensional Waves in Beams
- 1 April 1990
- journal article
- research article
- Published by SAGE Publications in Journal of Intelligent Material Systems and Structures
- Vol. 1 (2) , 235-247
- https://doi.org/10.1177/1045389x9000100206
Abstract
The simultaneous active control of flexural and extensional vibrations in elastic beams is experimentally investigated. The results demonstrate that using pairs of piezoceramic transducers, whose elements are symmetrically located and independently controlled by a multichannel adaptive controller, enables the high attenuation of both flex ural and extensional response. This capability is due to the nature of the piezoceramic ele ment, which when bonded to the surface of the structure and electrically excited, exerts a surface strain on the structure. This strain enables input of both shear forces and moments into the structural system. The results are applicable to many situations where extensional vibrations couple to large flexural vibrations and subsequently radiate signifi cant sound levels.Keywords
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