Hits:

Indexed by:期刊论文

Date of Publication:2009-07-01

Journal:STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION

Included Journals:SCIE、EI、Scopus

Volume:39

Issue:1

Page Number:105-113

ISSN No.:1615-147X

Key Words:Sensitivity analysis; Stochastic excitation; Coupled structural-acoustic systems; Pseudo excitation method

Abstract:A development for computing the acoustic pressure spectral density and its sensitivity of coupled structural-acoustic systems subjected to stochastic excitation is presented. Previous work in the area of structural-acoustic response considered systems subject to deterministic excitations. The response computation depends on the excitation; therefore, new methods are developed to account for stochastic excitation. The structural-acoustic response is calculated using finite element methods and stochastic analysis techniques. An accurate and highly efficient algorithm series for structural stationary random response analysis, pseudo excitation method (PEM) is used. Numerical examples are given to demonstrate the effectiveness of the methods and the program.