SOUND-ABSORBING STRUCTURE Russian patent published in 2011 - IPC B32B3/12 B60R13/08 

FIELD: construction.

SUBSTANCE: invention relates to sound-absorbing facilities with cellular filler and may be used in aircraft construction, motor industry, shipbuilding and other industries. Sound-absorbing structure comprises filler arranged between surface sheets and consisting of hollow cells of various volume. In one of surface sheets there are through holes communicated with air cavities of hollow cells. Diametre of hole is proportional to area of cross section of according cell and its resonant frequency. Filler consists of set of mutually crossing plates with flanging and cuts arranged from external edge of plates to flanging at various distances from each other to form cells of various volume in assembly of filler elements. In cut parts, being walls of cells, there is a hole with diametre that is not more than diametres of holes in surface sheet of according adjacent cells. Filler is fixed to surface sheets along flanging of plates.

EFFECT: wider range of absorbed frequencies and reduction of structure weight.

1 dwg