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1. (WO2017186765) PHONONIC CRYSTAL VIBRATION ISOLATOR WITH INERTIA AMPLIFICATION MECHANISM

Pub. No.:    WO/2017/186765    International Application No.:    PCT/EP2017/059870
Publication Date: Fri Nov 03 00:59:59 CET 2017 International Filing Date: Thu Apr 27 01:59:59 CEST 2017
IPC: G10K 11/165
G10K 11/04
Applicants: EMPA EIDGENÖSSISCHE MATERIALPRÜFUNGS- UND FORSCHUNGSANSTALT
Inventors: DELPERO, Tommaso
BERGAMINI, Andrea
Title: PHONONIC CRYSTAL VIBRATION ISOLATOR WITH INERTIA AMPLIFICATION MECHANISM
Abstract:
A unit cell (1) of an artificial phononic crystal (2) for building of an artificial phononic metamaterial, showing reduced mechanical vibrations in a defined frequency range with at least one band gap in the band structure dispersion relation of the unit cell (1), where the unit cell (1) comprises at least one building block (10) and at least one mechanical connection (11) connected to the building block (10), showing reduced mechanical vibrations in a defined frequency range with tailored dispersion properties with at least one band gap is sought. This is accomplished by forming the building block (10) as a toroid (10), with a central opening (100) and a front surface (f) from which a first multiplicity of struts (11), which are tiltable relatively to the principal direction (z), is extending from the front surface (f), wherein more than one strut (11) is inclined with respect to the principal direction (z) so that a rotation of the toroid (10) around the principal direction (z) is possible.