抄録
By authors, a numerical method was previously proposed to calculate dynamic dissipated energy for mixed structures including elastic body, viscoelastic body and porous body. An expression to calculate share of dissipated energy for an each element in mixed structures was derived. In this report, vibration transmission properties are analyzed using the method for mixed structures composed of porous media sandwiched between damped steel beam and plastic sheet. A spacer is installed between the damped steel beam and the resin sheet in the structures, to analyze deterioration of vibration by the sound bridge phenomena.
