Patent ID: 7409269
Filing Date: 2008-08-05
Classification: G01H

Abstract:
1. A method of analyzing a vibro-acoustic optimization potential of a structure of vibro-acoustically coupled subsystems having internal and coupling loss factors, by means of a statistical energy analysis (SEA) of a selected subsystem and its sensitivity to changes in the internal and coupling loss factors, wherein the subsystem energies E in a selected frequency band with center frequency ω m are given by ω m L·E=P, with P being input powers to the subsystems and L being an SEA matrix of internal and coupling loss factors η ij , comprising the steps of: a) calculating a gradient of energy of said selected subsystem with respect to each of the internal and coupling loss factors on a basis of a simplified SEA matrix in which all coupling loss factors η b) identifying the internal loss factors causing M highest gradients, M being a given integer, as dominant internal loss factors for the vibro-acoustic optimization of the structure, and c) identifying the coupling loss factors causing N highest products, which each consist of the gradient times its coupling loss factor, N being a given integer, as dominant coupling loss factors for the vibro-acoustic optimization of the structure.