Methods of analyzing the vibro-acoustic optimization potential and optimizing the vibro-acoustic behavior of a structure

摘要

The invention relates to a method of analyzing the vibro-acoustic optimization potential of a structure of vibro-acoustically coupled subsystems having internal and coupling loss factors by means of statistical energy analysis (SEA). The invention further relates to a method of optimizing the vibro-acoustic behavior of such a structure. The inventive methods involve the steps of:calculating the gradient of energy on the basis of a simplified SEA matrix in which all coupling loss factors θji with ji have been substituted according to η_ijn_i=η_jin_j;identifying the internal loss factors causing the M highest gradients as dominant internal loss factors and the coupling loss factors causing the N highest products, which each consist of a gradient times its coupling loss factor, as dominant coupling loss factors;calculating an optimization potential for each of the dominant internal and coupling loss factors as the maximum sub-system energy change which can be achieved by varying said loss factor; andidentifying the dominant internal and coupling loss factors with the K highest optimization potentials as optimization loss factors for the further vibro-acoustic optimization of the structure.