TITLE:
Sound Transmission Loss Analysis of a Double Plate-Acoustic Cavity Coupling System with In-Plane Functionally Graded Materials
AUTHORS:
Changzhong Chen, Mingfei Chen, Wenliang Yu
KEYWORDS:
Isogeometric Analysis, Sound Transmission Loss, Double-Plate System, Functionally Graded Materials, Acoustic Structure Coupling
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.12 No.6,
June
28,
2024
ABSTRACT: In this paper, the isogeometric analysis (IGA) is employed to develop an acoustic radiation model for a double plate-acoustic cavity coupling system, with a focus on analyzing the sound transmission loss (STL). The functionally graded (FG) plate exhibits a different material properties in-plane, and the power-law rule is adopted as the governing principle for material mixing. To validate the harmonic response and demonstrate the accuracy and convergence of the isogeometric modeling, ANASYS is utilized to compare with numerical examples. A plane wave serves as the acoustic excitation, and the Rayleigh integral is applied to discretize the radiated plate. The STL results are compared with the literature, confirming the reliability of the coupling system. Finally, the investigation is conducted to study impact of cavity depth and power-law parameter on the STL.