초록 ▼

An improved acoustic panel (26) for the nacelle (20) of a high bypass jet engine. The acoustic panel (26) has a perforated composite inner sheet (54), an outer composite sheet (96, 98), and a new reinforcement structure, or pre-cured doubler (62) therein. The pre-cured doubler (62) is arranged to re

An improved acoustic panel (26) for the nacelle (20) of a high bypass jet engine. The acoustic panel (26) has a perforated composite inner sheet (54), an outer composite sheet (96, 98), and a new reinforcement structure, or pre-cured doubler (62) therein. The pre-cured doubler (62) is arranged to receive a load applied to the acoustic panel (26), and includes a face sheet (64) connected to a structural attachment area (52) of the perforated composite inner sheet (54). A structurally-reinforced core (63) is connected the face sheet (64). Preferably, the width of the face sheet (64) in an air flow direction of the acoustic panel (26) is substantially equal to the width of the structurally reinforced core (63) in the air flow direction. The pre-cured doubler (62) provides increase acoustic area in parts of the acoustic panel adjacent to attachment fittings (46). Expanded epoxy (87a) is also used to reinforce side edges and selected areas of the acoustic core (60) for the acoustic panel (26).

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] An acoustic panel defining an air flow direction and having reinforced regions thereon, comprising:a perforated composite inner sheet having a structural attachment area and a perf

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] An acoustic panel defining an air flow direction and having reinforced regions thereon, comprising:a perforated composite inner sheet having a structural attachment area and a perforated area;a composite core arranged over the perforated composite inner sheet, including:a first, noise-absorbing core section arranged over the perforated area;a second, load receiving, core section arranged over the structural attachment area to receive a load applied to the acoustic panel, the second core section comprising a face sheet connected to the structural attachment area of the perforated composite inner sheet and a structurally-reinforced core material, the structurally-reinforced core material connected to the face sheet, and the width of the face sheet in the air flow direction being substantially equal to the width of the structurally reinforced core material in the air flow direction; andan outer composite sheet attached to the composite core so that the first and second core sections extend substantially between the perforated composite inner sheet and the outer composite sheet.