Damping Response Analysis by FEM and MSKE Method for Double Walls Including Base Plate Having an Acoustic Black Hole and Fixed Opposite Edges

Abstract

In order to realize a comfort industrial product with a safe structure, vibration suppression is an important technology both industrially and environmentally. Therefore, in this report, the base plate in the sound absorbing double wall structure has an acoustic black hole. A model is applied under the condition that the damping material is on the surface of the black hole. The base plate is fixed on the opposite edges of the black hole. The other edges have free boundaries. Numerical analysis is performed to clarify changes of vibration reduction and vibration transmission from the base plate to the cover plate using FEM and MSKE method proposed by Yamaguchi et al.