Study on Method of Structure Model Construction for Statistical Energy Analysis using FEM

Abstract

This paper presents a structure model construction for statistical energy analysis (SEA) using FEM. Identifying SEA parameter regardless of the excitation method is demanded effectively. The proposed method is based on a combination of SEA and vibration response by base excitation like forced displacement vibration analysis, random vibration analysis, and large mass method. These methods are effective on an analytical cost performance compared with the conventional force excitation method that is called rain-on-the-roof-excitation. In this study, the proposal method is validated through the two types of model, (i) simple flat plate consisting of one subsystem, and (ii) an L plate consisting of two subsystems. As a result, the method is shown to work quantitatively well to the coupling loss factors.