Design of Metamaterial Bipanel for Controlling Ultralow Frequency Vibration

Generally, the noise caused by mechanical vibration often affect our health, especially from airplanes and automobiles and trains, etc. The traditional viscoelastic damping materials have any issues to control the low frequency vibration. Recently, the numerous research findings of locally resonant metamaterials have been achieved to improve the absorption functionality in the low frequency vibration. The dispersion curves of ABSPMMA polymer bipanel have been studied by using the finite element method (FEM) and their flexural wave bandgap with the steel mass blocks has been computed in ultralow frequency range from 54 Hz to 65 Hz at the subwavelength size. The frequency domain with negative density is the good agreement with the flexural wave bandgap. Thus, this original metamaterial bipanel with the resonance blocks can render the flexural wave bandgap to control the ultralow frequency vibration.