Sound transmission through composite sandwich plate with pyramidal truss cores

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• 作者：Dong-Wei Wang ; Li Ma ; ^{mali@hit.edu.cn}
• 关键词：Pyramidal truss cores ; Sound transmission loss ; Sandwich structure ; Wave propagation
• 刊名：Composite Structures
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：164
• 期：Complete
• 页码：104-117
• 全文大小：2882 K
• 卷排序：164

文摘

In this paper, the sound transmission loss (STL) through sandwich structure with pyramidal truss cores immersed in the surrounding acoustic fluids is investigated. The periodic model is established in two dimensions. Trusses are replaced by translational and rotational springs and the stiffnesses are calculated by the theory of Euler beam. Fluid-structure coupling is considered by imposing velocity continuity condition at fluid-structure interfaces. The dynamic equations are derived by using space harmonic expansions and the principle of virtual work. The sound transmission characteristics of structure are studied by using the numerical calculation. Then, the effects of incident wave, geometry of truss and material properties are discussed for thorough understanding and system design.