桁架
有限元法
材料科学
芯(光纤)
结构工程
声音传输等级
帧(网络)
夹层结构复合材料
隔音
声学
夹芯板
复合材料
计算机科学
工程类
物理
电信
标识
DOI:10.1177/10996362211028899
摘要
Recently, sandwich structures have been widely used in different fields because of their good mechanical properties, but these structures are weak in acoustic performance. In this paper, by combining pyramidal truss core sandwich structure with frame, a new structure is proposed with both good mechanical properties and excellent acoustic performance at low frequency. An analytical model of the pyramidal truss core sandwich structure with frame is developed to investigate the sound transmission loss (STL) performance. Finite element method (FEM) is also used to investigate the STL performance at low frequency. The effects of the incident wave angle and the geometrical parameters on the STL of the structure are discussed.
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