Abstract
This paper describes a theoretical and experimental development of a laminated spatially distributed piezoelectric torsional vibration actuator for a clamped-free cantilever beam. The strain energy transferred from a piezoelectric film actuator to a substructure is derived as a function of actuator strain only and is then used to calculate the induced strain in a substructure loaded in uniaxial extension/compression, bending and torsion. This transferred energy can be maximized by optimizing the actuator/structure dimensions and material properties. An experimental cantilever beam was constructed to examine the first mode decay in torsion under the influence of the actuators. The theoretical and experimental decay histories of the first torsion mode decay indicate a reduction in decay time for the controlled beam of greater than 10 times that of the uncontrolled beam.
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