اسماعيل اسكندري

In this study, the acoustic radiation pressure of a cylindrical shell of finite length made of functionally graded piezoelectric material (FGPM) is analyzed using the three-dimensional elasticity theory. The shell is excited by a monopole acoustic harmonic charge an‎d immersed in a fluid medium. In the first step, the governing constitutive equations of the shell an‎d the three-dimensional equations related to the functionally graded piezoelectric material were extracted. Then, using the transfer matrix method, the variations of the material constants along the thickness were determined in the form of an effective matrix. Next, by solving the governing equations, the acoustic pressure field for a functionally graded piezoelectric cylindrical shell immersed in a fluid was extracted an‎d the results were compared with a steel cylindrical shell. The effect of each of the key an‎d important parameters, including changes in length, radius, an‎d thickness, as well as changes in loading location, on the changes in the far-field acoustic pressure for the functionally graded piezoelectric cylindrical shell was analyzed an‎d investigated. The results were then eva‎luated by changing the external fluid from air to water.

تابش آكوستيكي , فشار آكوستيكي , پوسته هاي استوانه اي , مواد پيزوالكتريك تابعي مدرج , بار هارمونيك , تئوري الاستيسيته سه‌بعدي

Acoustic Radiation , Acoustic pressure , Cylindrical Shells , Graded function piezoelectric materials , Harmonic load , Three-dimensional elasticity theory

Esmaeil Eskandari

Kamran Daneshjoo