A Unit cell (0) of an artificial phononic crystal for building of artificial phononic metamaterials, especially applicable in the field of railroad and tramway protection and for railway track components for reduction of mechanical vibrations, is disclosed, with sufficient vibration attenuation abilities needs an optimized space-saving geometry. This is reached by each metal strut (4, 4', 4"...) is connected to a connection point (A) at the underside (10) on a first straight line (A1) at an radius (r1, ..rn) from a rotation axis (Z) protruding to the connection points (B') at the upper side (20) on a second straight line (B2) at the same corresponding radius (r1, ..rn) from the rotation axis (Z), while projection in x-y plane of first straight line (A1) and second straight line (B2) of each metal strut (4, 4', 4"...) includes a intersection angle (φ) defined by length of metal strut (4, 4', 4"...) and radius (r1, ..rn) and distances between rotation axis (Z) and connection points (A, B') of each metal strut (4, 4', 4"...) in x-y plane are equal, and each metal strut (4, 4', 4"...) is individually rotated around rotation axis (Z) such that, the longitudinal extension of each metal strut (4, 4', 4"...) is oriented to be tangential to the associated radius (r1, ..rn) in projection in the x-y plane.
UNIT CELL OF PHONONIC CRYSTAL WITH SPACE-SAVING GEOMETRY
ELEMENTARZELLE AUS PHONONISCHEM KRISTALL MIT RAUMSPARENDER GEOMETRIE
CELLULE UNITAIRE DE CRISTAL PHONONIQUE À GÉOMÉTRIE PEU ENCOMBRANTE
2024-08-28
Patent
Electronic Resource
English
IPC: | E01B PERMANENT WAY , Gleisoberbau / E01F ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE , Zusätzliche Baumaßnahmen, wie die Ausstattung von Straßen oder die bauliche Ausbildung von Bahnsteigen, Landeplätzen für Hubschrauber, Wegweisern, Schneezäunen oder dgl. / B61G Kupplungen besonders ausgebildet für Eisenbahnfahrzeuge , COUPLINGS SPECIALLY ADAPTED FOR RAILWAY VEHICLES / F16F SPRINGS , Federn / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES |
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