The invention relates to the technical field of noise control in an aircraft cabin, in particular to an aircraft noise reduction wallboard based on an acoustic metamaterial. The aircraft noise reduction wall plate based on the acoustic metamaterial sequentially comprises an aircraft wall plate, aircraft cotton, a metamaterial sound absorption plate and/or a metamaterial sound insulation thin plate and an inner decoration plate surface layer in the direction from the outside to the inside of a cabin. The invention provides three light acoustic metamaterial noise reduction wallboards by utilizing a sub-wavelength noise reduction mechanism of an acoustic metamaterial and an impedance matching principle of the acoustic metamaterial and a traditional porous acoustic material, and the three light acoustic metamaterial noise reduction wallboards are used for absorbing and isolating structural radiation noise and air transmission noise caused by operation of an aircraft engine and a turbulent boundary layer; the aircraft noise reduction wallboard based on the acoustic metamaterial is convenient to assemble and flexible in structure, and can be packaged to be used for designing noise reduction wallboards of various types of aircrafts.
本发明涉及飞机舱内噪声控制技术领域,尤其是涉及一种基于声学超构材料的飞机降噪壁板。本发明的基于声学超构材料的飞机降噪壁板由舱外至舱内的方向,依次为飞机壁板、飞机棉、超构吸声板和/或超构隔声薄板、内饰板表层。本发明利用声学超构材料的亚波长降噪机制及其与传统多孔声学材料阻抗匹配原理,提供三种轻质声学超构材料降噪壁板,用于吸收与隔离来自飞机发动机运转与湍流边界层引起的结构辐射噪声和空气传递噪声;本发明的基于声学超构材料的飞机降噪壁板装配便捷、结构灵活,可封装用于多类机型降噪壁板的设计。
Aircraft noise reduction wallboard based on acoustic metamaterial
一种基于声学超构材料的飞机降噪壁板
2024-07-12
Patent
Electronic Resource
Chinese
IPC: | B64C AEROPLANES , Flugzeuge |
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