公开(公告)号：US20210390940A1

公开(公告)日：2021-12-16

申请号：US17460933

申请日：2021-08-30

Applicant: Safran Nacelles

Inventor： Bertrand DESJOYEAUX ,  Marc VERSAEVEL ,  Mathieu PREAU ,  Laurent MOREAU

IPC: G10K11/168 ,  B29D24/00 ,  B32B3/12 ,  B32B27/40 ,  B32B27/12 ,  B32B5/02 ,  B32B3/26

Abstract: A method for manufacturing a sound attenuating panel uses an alveolar-core structure including a first edge and a second edge separated by alveolar cells, the alveolar cells including walls extending from the first and second edges and defining a primary conduit for the circulation of a sound wave that is to be attenuated. The method includes covering the first edge or the second edge of the alveolar-core structure with a compartmentation wall; deforming the compartmentation wall to define at least one secondary conduit for the circulation of a sound wave that is to be attenuated, the secondary conduit extending at least partially within said primary conduit; and creating an opening in the compartmentation wall to permit communication between the primary and secondary conduits.

公开(公告)号：US20230003176A1

公开(公告)日：2023-01-05

申请号：US17903359

申请日：2022-09-06

Applicant: Safran Nacelles

Inventor： Bertrand Léon Marie DESJOYEAUX ,  Marc VERSAEVEL ,  Mathieu François Eric PREAU ,  Laurent MOREAU

IPC: F02K1/82 ,  B64D33/02

Abstract: A method for manufacturing an alveolar core structure includes at least one cell including a secondary duct having a first end defining a sound wave inlet, and an opposite second end, the secondary duct comprising a sound wave outlet. The method also includes a fastening step in which adhesive tapes transverse to the longitudinal direction of said first plate are applied on a first longitudinal plate. The secondary duct in the form of a flattened element is fastened, on the first plate, by gluing at its sound wave inlet. A second plate is applied. A step of deploying the first and second plates so as to form the peripheral wall of the cells and so that the flattened element is deployed.