Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5472869 | Aerospace Science and Technology | 2017 | 49 Pages |
Abstract
An algorithm that integrates Karhunen-Loeve expansion (KLE), finite element method (FEM), and boundary element method (BEM) is proposed to carry out a vibro-acoustic analysis under stationary and non-stationary random excitations which are uncorrelated or correlated. In the KLE, a set of orthogonal basis functions is employed to discretize the auto-covariance function of the excitations and obtain the eigenvalues and eigenfunctions of the auto-covariances. The KLE for correlated random excitation relies on the expansions of correlated random variables. During the response calculation, the FEM and BEM are employed to obtain structural and acoustic responses. A circular piston in an infinite baffle and a stiffened panel excited by stationary or non-stationary random processes are used to illustrate the proposed algorithm's accuracy. Results show that the statistics of vibro-acoustic response are accurately obtained with the proposed method and this method is also applicable for the vibro-acoustic analysis of more complex structures under various types of random excitations.
Related Topics
Physical Sciences and Engineering
Engineering
Aerospace Engineering
Authors
Yanbin Li, Sameer B. Mulani, Qingguo Fei, Shaoqing Wu, Peng Zhang,