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Sound transmission through composite sandwich plate with pyramidal truss cores

机译：声音通过具有锥体桁架芯的复合夹心板传播

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摘要

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. (C) 2016 Elsevier Ltd. All rights reserved.
机译：本文研究了通过将金字塔形桁架芯浸入周围声流体中的夹心结构的声传输损耗（STL）。二维建立了周期性模型。桁架由平移和旋转弹簧代替，刚度由欧拉梁理论计算。通过在流固界面处施加速度连续性条件来考虑流固耦合。利用空间谐波展开和虚拟功原理推导了动力学方程。通过数值计算研究了结构的传声特性。然后，讨论了入射波，桁架的几何形状和材料特性的影响，以进行深入的了解和系统设计。 （C）2016 Elsevier Ltd.保留所有权利。

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