A modal impedance-based statistical energy analysis for vibro-acoustic analysis of complex systems having structural uncertainty

Abstract

A modal impedance-based statistical energy analysis for point, line, and area connected complex structural-acoustic systems is introduced. The proposed methodology is applied to perform mid- and high-frequency vibro-acoustic analysis of a cabinet model. The cabinet is composed of several composite plates with local mass variability simulating structural uncertainty, isotropic beams, and an acoustic enclosure. The method uses point mobilities, which are determined using modal parameters obtained by finite element method, to define line and area mobilities via dimension reducing principle. The methodology presented here is successfully verified by several numerical and experimental Monte Carlo computations. With this study, conventional statistical energy analysis is improved for mid-frequency vibro-acoustic analysis of complex systems.

The Vibro-Acoustic Characteristics Analysis of the Coupled System between Composite Laminated Rotationally Stiffened Plate and Acoustic Cavities

“…Qu and Meng [3] employed an improved variational principle and a multi-level partitioning method to investigate the nonlinear vibration and acoustic radiation responses of laminated plates with skin-core debonding under time-varying loads in an unlimited fluid. Secgin et al [4] proposed a statistical energy analysis method for complex structural acoustic systems, including point, line, and area connections. This method was used for mid-to highfrequency vibrations and acoustic analysis of box-model-basing modal impedances.…”

Damping determination by the half power bandwidth method for a rectangular flat plate with bitumen damping layer application

“…They obtained the in-situ energy loss by using numerical and experimental PIM. Seçgin et al [10] investigated these parameters for the different connection types from another aspect, such as the effect of the local mass variability, to simulate the uncertainty of the structure. With this methodology, the authors improved the classical SEA in the mid-frequency range for complex systems.…”