LAMINATED PANEL WITH CORRUGATED CORE Russian patent published in 2023 - IPC B32B3/30 E04B1/82 F02C7/45 B21D47/04 

FIELD: aircraft engineering.

SUBSTANCE: design and manufacture of noise absorption panels that can be used in aircraft air intake ducts and aircraft engines. The panel consists of top and bottom skins connected with corrugated core. The upper skin is made perforated with holes facing the resonant chambers. The chambers are formed by alternating perforated vertical and inclined edges of the filler. The angle of inclination of the faces varies along the panel length.

EFFECT: increase in the effect of noise reduction in a wide range of frequencies.

1 cl, 2 dwg, 1 ex