On the Vibration Attenuation Properties of Metamaterial Design Using Negative Stiffness Elements

Abstract

In recent years, the promising concept of metamaterials has entered the field of civil engineering. These type of configurations are characterized by extraordinary properties regarding prevention or guidance of wave propagation. In order to increase the potential frequency band in which such structures efficiently attenuate vibration, the concept of nonlinearity is here exploited. Negative stiffness elements are studied and arranged in a lattice of identical cells, in order to study the resulting wave screening properties. The outcomes of this study indicate the ability of the system to mitigate vibration within a wide range of frequencies.

On the Vibration Attenuation Performance of a Geometrically Nonlinear Device Mounted to a Multi-Storey Structure

“…Al-Shudeifat [9] and Chen et al [10] have studied the properties of a nonlinear energy sink, formed by a triangular arch arrangement, able to create a negative stiffness effect, where the "restoring" force points to the same direction as the external loading, demonstrating its vibration mitigation capabilities. Nonlinearity and negative stiffness have also been studied in metamaterial configurations [11,12,13,14], demonstrating potential towards structural applications of [15,16] within the metabarrier and metafoundation context. Within the context of geometrically nonlinear mechanisms targeting a negative stiffness effect, the K-Damper device has been recently proposed [17,18,19].…”