Abstract
Piezoelectric (PZT) actuators bonded on a structure can be used to generate deformation and excite vibration for the shape control and vibration suppression, respectively. This article proposes a theoretical model for predicting vibrational response of a composite laminate plate with PZT actuators. The bending moment induced by the PZT actuator was obtained and applied on the composite laminate plate. Utilizing composite mechanics and plate theory, an analytical solution of the vibrational response of a composite laminate plate excited by the PZT actuator with oscillating voltage was derived. Furthermore, the finite element analysis using ANSYS software (2019 version) was carried out to compare with the proposed model with a good agreement. A parametric study was performed to investigate the influences of PZT location and frequency on the vibration. Numerical results illustrate that mode can be selectively excited provided the PZT actuator is placed in an appropriate location. Moreover, the proposed model was employed to predict the effectiveness of vibration suppression by distributed PZT actuators. The novelty of this work is that a complicated coupling problem between the composite plate and bonded PZT actuator is resolved into two simple problems, leading to a simple analytical solution for the vibrational response of a composite plate induced by PZT actuators. The proposed model has been successfully demonstrated its applications on the vibration excitation and suppression of a composite laminate plate.
Highlights
Numerical examples are presented to demonstrate the capability for the excitation of a cross-ply composite laminate plate by a PZT actuator
In the finite element analysis, the SOLID45 element with eight 3D nodes and orthotropic material properties was selected for the composite laminate plate
Dictvibrational the vibrational response of a supported composite laminate excited by actuators
Summary
The use of composite material in industries such as aerospace, sports, and automobile has been increasing rapidly over the last decade due to its high strength-to-weight ratio. One of the main advantages of the composite over conventional materials is that it can be tailored to meet the certain requirements of a specific application, for example, minimum weight, maximum failure load, and maximum fundamental frequency [1–3]. A smart structure has the capability of providing appropriate response to the either external or internal environmental changes through the incorporated sensors and actuators. One of the most promising smart structures is a composite laminate equipped with distributed sensors and actuators. PZT has the advantages of light weight, fast response, low cost and easy implementation, which can be utilized for shape and vibration control. PZTs can be attached on or embedded into a host structure with minimum modification of the original structure [8]
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