Construction of Experimental SEA using FEM on a Mechanical Structure subjected to Displacement Excitation

This paper describes 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, one is based on a combination of SEA and vibration response by random vibration analysis, and another is a combination of SEA and vibration response by displacement excitation. These method are effective on an analytical cost performance for base excitation 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 internal loss factors and qualitatively well to the coupling loss factors.