Parameters design of a nonlinear membrane absorber applied to an acoustic cavity

摘要

The targeted energy transfer (TET) phenomenon has been demonstrated and analyzed between an acoustic medium inside a parallelepiped cavity and a thin viscoelastic membrane that is mounted on one wall of the cavity and that is working as a nonlinear absorber or a nonlinear energy sink (NES). Based on the desired working zone of the NES and the two thresholds of the zone which have been obtained, this paper investigates the parameters analysis of a nonlinear membrane absorber to design the NES. The physical parameters of the membrane and the place of the membrane on the wall of the cavity are studied. It can finally provide us to determine where is the better place for the membrane and which parameter affects mainly the desired working zone for the NES.