Smart Noise Control Using Shape Memory Sound Absorber

被引:11
作者
Park, Juhyuk [1 ]
Kim, Hyung Min [1 ]
Youn, Jae Ryoun [1 ]
Song, Young Seok [2 ]
机构
[1] Seoul Natl Univ, Dept Mat Sci & Engn, RIAM, Seoul 08826, South Korea
[2] Dankook Univ, Dept Fiber Syst Engn, Gyeonggi Do 16890, South Korea
基金
新加坡国家研究基金会;
关键词
multiscale modeling; porous materials; shape memory polymers; smart materials; sound absorption; POLYURETHANE FOAM; MICROSTRUCTURES; FABRICATION; TORTUOSITY; AIR;
D O I
10.1002/admt.201800410
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Efficient and satisfactory noise damping is essential for achieving a high quality of life. Therefore, the way of sound absorption is a very important technical issue in various industries such as automobiles, acoustics, naval architecture, and so on. In this paper, a unique sound absorber which could manipulate its geometry and resulting performance in an active fashion is demonstrated. The strategy is to adopt the reversible shape-changing ability of a shape memory polymer foam. The microstructure of foam is programmed and recovered in order to control the sound absorption capability dependent on frequency. The results reveal that the sound absorption coefficients could be tuned for the noise control based on frequency matching. Furthermore, the underlying theory is studied with a numerical simulation method regarding shape memory behavior and poroacoustical behavior. It is expected that the shape memory sound absorber proposed in this research provides a new insight into noise, vibration, and harshness technology.
引用
收藏
页数:8
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