Abstract
This paper deals with the vibro-acoustic coupling of an irregular enclosure covered with aPZT-bonded panel. The modeling of the system is developed with full consideration of theacoustic–structural–piezoelectric interactions between the actuated panel andthe enclosure, along with the modeling of the irregular shape of the enclosure.Simulations are conducted to investigate the effect of the actuation patch onstructural modal modification, and subsequently on the structural–acoustic couplingmechanism. Results show that the structural mode shapes can be altered significantly,depending on the patch locations and structural frequency behavior (singlet, doubletor closely coupled), and the patch effect on the coupling density is noticeable,especially when the inclined angle of the enclosure is within a sensitive region. Thisstudy provides a more thorough physical understanding of how the PZT patchinfluences the modal coupling between the actuated panel and the enclosure,which might be useful for all control techniques involving PZT actuated panels.
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