METHOD FOR MAKING SOUND-ABSORBING CONSTRUCTION Russian patent published in 2020 - IPC B32B3/12 B32B7/12 G10K11/168 

FIELD: physics.

SUBSTANCE: invention relates to aircraft engineering and relates to a method for manufacturing a resonance-type sound absorbing structure intended for use in turbojet engine sound absorbing panels and in transport equipment, including in production of flow paths of modern aircraft engines. Besides, the considered sound-absorbing structures can be used for objects of railway and water transport, motor roads, construction, industrial equipment. According to the method, the surfaces of the structural elements to be glued are cleaned and degreased, the glue is applied on both ends of the filler having a plurality of end cells, facing sheets are successively laid on the end surfaces of the aggregate, one of which is perforated, after which obtained assembly is compressed and adhesive is cured, at that after cleaning and degreasing of surfaces of aggregate and facing sheets one or more piezoelectric elements are installed on their surfaces or surface of one of them, piezoelectric elements are connected to each other and connected by control electrodes to a source of control electric voltage; the obtained structure is cured; then the facing sheets are glued to faces of the aggregate; the obtained assembly is compressed and glue is cured.

EFFECT: sound-absorbing structure made using the proposed method allows increasing the sound absorption coefficient with simultaneous increase in the broadband structure of the sound-absorbing structure.

1 cl, 14 dwg, 1 ex