Acoustic and vibrational energy absorption metamaterials

摘要

An acoustic/vibrational energy absorption metamaterial includes at least one enclosed planar frame with an elastic membrane attached having one or more rigid plates are attached. The rigid plates have asymmetric shapes, with a substantially straight edge at the attachment to said elastic membrane, so that the rigid plate establishes a cell having a predetermined mass. Vibrational motions of the structure contain a number of resonant modes with tunable resonant frequencies.

主权项

1. An acoustic/vibrational energy absorption metamaterial comprising:
an enclosed planar frame; an elastic membrane attached to said frame; at least one rigid plate attached to said elastic membrane, the rigid plate having an asymmetric shape, with a substantially straight edge at the attachment to said elastic membrane, the rigid plate establishing a cell comprising a predetermined mass; and the rigid plate mounted to provide a restoring force exerting by the elastic membrane upon displacement of the rigid plate, wherein vibrational motions of the structure contain plural resonant modes with tunable resonant frequencies.