Shear-based vibration control of annular sandwich plates using different piezoelectric fiber composites: A comparative study.

This work presents the shear-based attenuation of vibration of an annular sandwich plate using two different shear mode piezoelectric fiber composite (PFC) actuators namely Shear Actuated Fiber Composite (SAFC) and Balanced Laminate of PFC (BLPFC). A conventional shear mode monolithic piezoelectric (PZT5H) actuator is also used, and a comparative study on the shear actuation capabilities of all three shear actuators is performed to address the best one for shear-based control of the annular sandwich plate. Every actuator is used in the form of an actuator laminate that is inserted at the core of the sandwich plate in the form of the patches, where a fruitful arrangement of the patches and a shear-based control strategy are presented for effective attenuation of vibration of the sandwich plate according to the velocity feedback control law. First, the effective properties of the actuator laminate are determined using the Uniform Field Method. Next, a closed-loop finite element model of the sandwich plate is developed based on the layer-wise shear deformation theory. Subsequently, the suitability of the present arrangement of shear actuator patches and the shear-based control strategy are substantiated. This arrangement of the actuator patches is further optimized for every shear actuator, and the corresponding shear actuated resonant displacement-amplitudes of the sandwich plate are evaluated. These results reveal lesser actuation capability of the SAFC than that of the PZT5H while the BL-PFC is the best one for shear-based attenuation of vibration of the annular sandwich plate. [ABSTRACT FROM AUTHOR]