COMBINED CELLULAR PANEL Russian patent published in 2016 - IPC B32B3/12 B32B3/24 

FIELD: machine building.

SUBSTANCE: invention relates to cellular structures to be used in aircraft engineering, shipbuilding, machine building and construction and concerns a combined cellular panel. Panel consists of solid and perforated shells connected with cellular filler. Perforated shells are made in form of mesh with various resistance blowing increasing height of panel in direction to solid shell. Mesh is connected with cellular filler with different density with ratio of values of density from top to bottom layer 1:2:3. Cells of lower layer of cellular filler are filled with fibrous material with sound absorption coefficient α approximately equal to 0.9.

EFFECT: higher efficiency of noise absorption in a wide range of frequencies.

1 cl