Correlated disorder in rainbow metamaterials for vibration attenuation

Granular metamaterials for vibration mitigation

Acoustic metamaterials that allow low-frequency band gaps are interesting for many practical engineering applications, where vibration control and sound insulation are necessary. In most prior studies, the mechanical response of these structures has been described using linear continuum approximations. In this work, we experimentally and theoretically address the formation of low-frequency band...

Sound attenuation and anharmonic damping in solids with correlated disorder

W. Schirmacher1,2, C. Tomaras3, B. Schmid2, G. Baldi4, G. Viliani5 , G. Ruocco6,7, T. Scopigno6,7 1 Physik-Department E13, Technische Universität München, James-Franck-Strasse 1, D–85747 Garching, Germany 2 Fachbereich Physik, Universität Mainz, Germany 3 Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München, Theresienstr. 37, D–80333 München, Germany 4 ESRF G...

Nonlinear Acoustic Metamaterials for Sound Attenuation Applications

Vibration Attenuation by Periodic Foundations

Vibration attenuation to horizontal propagating waves by using periodic foundations is investigation. Periodic structure theory is introduced to design a new type of isolation foundations, which has a special frequency band gaps (or ‘attenuation zones’) that can barrier waves/vibrations propagation. Materials usually used in civil engineering are used to fabric periodic foundations with the uni...

Active elastic metamaterials with applications in vibration and acoustics

Elastic metamaterials provide a new approach to solving existing problems in vibration and acoustics. They have also been associated with novel concepts such as acoustic invisibility and subwavelength imaging. To be applied to many of the proposed applications a metamaterial would need to have the desired mass density and elastic moduli over a prescribed frequency band. Importantly active metam...