波動ブラックホールを持つ側辺固定L字パネル構造のFEM援用SEA制振応答解析

抄録

This paper reports SEA (Statistical Energy Analysis) damping response analysis using FEM for two panels connected in L-shape with an acoustic black hole having a viscoelastic damping layer. The side edges of the L structure are fixed boundaries. And the other edges including the acoustic black hole are free. Generally, modal damping is influenced by not only shape of panels but also their boundaries. To explain for couplings in damping between SEA substructures, internal loss factors are identified using FEM and MSE（Modal Strain Energy）method. To know wave propagation between the substructures, coupling loss factors are calculated. Effects of the boundaries of L-shaped panel having the acoustic black hole on these SEA parameters are clarified.