研究人员在飞机蜂窝结构中插入轻巧的薄膜,以降噪

Researchers have developed membranes that can significantly reduce aircraft noise when inserted into the honeycomb structures used in aircraft design. Image credit: Yun Jing.

飞行时,乘客必须在整个飞行中处理噪音。来自North Carolina State University麻省理工学院已经共同创建了一个膜,该膜可以添加到飞机结构中,以显着降低进入机舱的低频噪声。

“这种设计对于制造坚固,轻巧且防守的结构很有希望。

NC State机械和航空工程助理教授Yun Jing

飞机的机翼和小木屋采用轻质材料设计,通常具有类似蜂窝状的结构。亚博网站下载大多数飞机小屋的天花板和地板都使用此材料。使用三明治蜂窝结构的目的是提供强度,轻巧的功能使飞机可以节省燃料。

但是,飞机发动机产生的低频噪声不能使用蜂窝结构阻塞。最初的想法是添加隔热材料以减少噪音,但这将大大增加飞机的整体重量,从而使其燃油效率降亚博网站下载低。

The NC State and MIT team developed a possible solution for this issue by developing a thin, lightweight membrane to cover a side of the honeycomb structure. This membrane is similar to a drum’s skin, and when sound waves strike it, they bounce off instead of penetrating through.

“It’s particularly effective against low-frequency noise. At low frequencies – sounds below 500Hertz – the honeycomb panel with the membrane blocks 100 to 1,000 times more sound energy than the panel without a membrane.

NC State机械和航空工程助理教授Yun Jing

The membrane is composed of rubber measuring approximately 0.25mm in thickness, and on the whole adds about 6% to the weight of the honeycomb panel.

“膜的生产相对便宜,并且可以由任何不影响蜂窝面板结构完整性的材料制成,”博士学位Ni Sui说。Jing的实验室的学生和该论文的首席作者。“这可能会使乘客的飞行更加愉快,尤其是在直升机上。”

该论文是“轻巧而又具有声音的蜂窝蜂窝状声道超材料”,在在线上发表在应用物理信函中。合着者包括Xiang Yan,Tai-Yun Huang和NC State的Fuh-Gwo Yuan和MIT的Jun Xu。这项工作得到了NC Space Grant的部分支持。

参考

Stuart Milne

写的

Stuart Milne

Stuart graduated from the University of Wales, Institute Cardiff with a first-class honours degree in Industrial Product Design. After working on a start-up company involved in LED Lighting solutions, Stuart decided to take an opportunity with AZoNetwork. Over the past five years at AZoNetwork, Stuart has been involved in developing an industry leading range of products, enhancing client experience and improving internal systems designed to deliver significant value for clients hard earned marketing dollars. In his spare time Stuart likes to continue his love for art and design by creating art work and continuing his love for sketching. In the future Stuart, would like to continue his love for travel and explore new and exciting places.

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    米尔恩,斯图尔特。2015.研究人员在飞机蜂窝结构中插入轻巧的薄膜,以降噪。Azom,2023年2月10日,//www.washintong.com/news.aspx?newsid=43723。

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