Damping response analysis of L-shaped panel structure having Acoustic Black Hole containing residual thickness using SEA with FEM

Abstract

This report is about response analysis using Statistical Energy Analysis（SEA）with FEM for two panels connected in L-shape with an acoustic black hole containing residual thickness. One end in the L structure is fixed. And other edges have free boundaries. Usually, modal damping is influenced by shape of panels and forms of the connection. Therefore, to consider coupling in damping between substructures, we use FEM and MSE（Modal Strain Energy）method to identify internal loss factors. Effects of the acoustic black hole containing residual thickness on the SEA parameters are studied. And for these cases, the proposed SEA enables us to improve not only precision in high frequency but also precision in low frequency.