A Method for Large-Scale Structural-Acoustic Analysis

Abstract

This paper presents a method for large-scale structural-acoustic analysis in which a cavity is divided into several acoustic fields, and a transfer-function method is used to solve the acoustics efficiently. By solving simultaneous equations using the Gaussian elimination method sequentially for each pair of neighboring acoustic sub-fields, the calculation time and memory requirements are reduced. Calculation accuracy is the same as when calculating the entire acoustic field without first dividing it. We created two kinds of closed acoustic models (cavity models) and carried out numerical simulations. The results showed that the proposed method is effective for large-scale structural-acoustic analysis.