Method for manufacturing a curved cellular structure using rigid tubes, and cellular structure thus obtained

A method for manufacturing a cellular structure of a sound attenuating panel, the cellular structure comprising a plurality of ducts that define cells, each duct of the plurality of ducts extending between a first end and a second end, the method comprising a step of:

• manufacturing the plurality of ducts from a rigid thermoplastic material;
• placing the plurality of ducts on a tool that comprises at least one base and, for each duct of the plurality of ducts, a core connected to the base, each duct of the plurality of ducts being fitted onto one of the cores and the first end thereof being in contact with the base;
• placing a flexible layer made from a thermoplastic material against the second ends of the plurality of ducts;
• heating and flat-pressing to fuse the flexible layer and the second ends of the plurality of ducts so as to form the cellular structure;
• and,
• demolding the cellular structure.