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- W2034186257 abstract "The use of piezoelectric materials as actuators for structures in active structural acoustic control has drawn much attention in recent times because of the ability to vary their geometry, location, and material properties in order to obtain the desired modal coupling. Investigations on the effect of shaping [Bailey and Hubbard] and varying the polarization profile of the piezoactuator [Lee] have been done and it was shown that selective modal coupling is possible by carefully varying the moment distribution function over the surface of the actuator. This essentially is effected by shaping the actuator, by varying the polarization profile, by varying the thickness of the actuator over the surface and by varying the electrode resistivity. In order to understand the full potential of distributed actuators, existing actuator models need to be viewed in terms of the equivalent moments and forces which they exert on the structure and also analyzed in terms of their spatial frequency (wave-number) components to determine the modal excitation characteristics. In this investigation, which is essentially the two-dimensional extension of the aforementioned studies, distributed actuators with different elementary shapes (rectangular, circular, triangular) surface bonded to flat plates are chosen and are analyzed in terms of the equivalent forces and moments they exert on the substructure. Also, the wave-number transforms of the spatial coordinates of these distributed piezoactuators are studied to ascertain their modal response characteristics. The elementary shapes are chosen without any a priori knowledge. The motivation is to design an actuator which has low shell mode coupling behavior and hence alleviates the control spillover problem and to better understand the influence of shape and moment profile of the piezoactuator on the substructure. Closed form solutions are given wherever possible and in other cases numerical integration results are presented." @default.
- W2034186257 created "2016-06-24" @default.
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- W2034186257 date "1991-10-01" @default.
- W2034186257 modified "2023-10-18" @default.
- W2034186257 title "Effective forces and wave‐number domain analysis of piezoactuators." @default.
- W2034186257 doi "https://doi.org/10.1121/1.401179" @default.
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