COMPOSITE SOUND-ABSORBING STRUCTURE MANUFACTURING METHOD Russian patent published in 2019 - IPC B32B3/12 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering, specifically to a method of making a sound-absorbing structure (SAS) of resonance type, intended for use in sound-absorbing panels of turbojet engine and in transport equipment, including in production of flow paths of modern aircraft engines, can also be used for railway and water transport facilities, construction, industrial equipment. Method of composite sound-absorbing structure includes manufacturing of sound-absorbing aggregate consisting of cells, separate sections and shells, one of which is made perforated. Shells are made separately for each section of filler, cells of filler are laid between shells, formed packet is connected, compressed and hardened. Or the sound-absorbing aggregate and shells are made as a whole in the form of separate sections. Obtained separate sections are connected, for example, by means of a lock connection, with possibility of disconnection from each other.

EFFECT: invention allows simplifying the method of making sound-absorbing structure of the gas path, reducing its labor intensity and improving noise reduction efficiency.

10 cl, 5 dwg