Acoustic wave transmission of FG composite cylindrical shells integrated with piezoelectric patches

Abstract

In this study, wave propagation through the air-filled double-walled functionally graded (FG) cross-ply layered cylindrical shells with an arrangement of piezoelectric patches is investigated in the framework of the first-order shear deformation assumption (FSDA). Acting as both actuator and sensor, these piezoelectric patches are acted upon by an electric potential. Power law model is utilized to take into account material characteristics distribution along the thickness of each shell. The derivation of vibroacoustic equations in the form of coupled relations is realized by implementing Hamilton’s principle. An analytical method is exploited to solve the coupled vibroacoustic governing equations in conjunction with double Fourier series, and the final result is the desired sound transmission loss (STL) equation. Parameter studies reveal the impacts of the of ply angle, functionally graded index, incident angles, acoustic cavity depth, external electric voltage, and characteristics of piezoelectric patches on STL through the double-walled cylindrical shells.