Low frequency waterborne sound insulation based on sandwich panels with quasi-zero-stiffness truss core
Low frequency waterborne sound insulation based on sandwich panels with quasi-zero-stiffness truss core
复制标题
DOI：
10.1115/1.4056316
复制
发表时间：
2022-11
期刊：
影响因子：
--
通讯作者：
Dongwei Wang;Quan Zhang;G. Hu
中科院分区：
文献类型：
--
作者：
Dongwei Wang;Quan Zhang;G. Hu
由于耐压性与水性隔声量呈负相关，低阻抗隔音材料很难在深水中发挥作用。在这里，我们提出了一种新机制来规避这个问题，即采用具有设计的动态准零刚度（QZS）桁架芯的夹芯板。网格核心由可编程曲梁制成，其形状经过精心设计，以满足耐高压和动态QZS的需求。开发了一个分析模型来评估此类面板的声音传输。结果表明，定制面板的低频隔声性能随着静水压力的增加而增加，并在触发QZS状态时达到最大值。所提出的夹芯板的有效压力范围可以通过堆叠不同静载荷平台的 QZS 梁网格来进一步编程。所提出的设计策略仅源于曲梁的结构几何形状，因此对材料不敏感。静载特征与特征力学性能/几何参数之间的线性/反比关系以及晶格的堆叠排列带来了面板承载能力的可编程性。该设计策略与已建立的数据库一起，为高压设备的水下隔音提供了一种可行的方法。
Due to the negative correlation between pressure resistance and waterborne sound insulation, low-impedance sound-proof materials can hardly work in deep water. Here we propose a new mechanism to circumvent this problem by employing sandwich panel with designed dynamics quasi-zero-stiffness (QZS) truss cores. The latticed cores are made of programmable curved beams, whose shape is carefully designed to meet the demand of both high-pressure resistance and dynamics QZS. An analytical model is developed to evaluate sound transmission of such panel. It is shown that the low-frequency sound insulation performance of the customized panel increases with the hydrostatic pressure and reaches its maximum when the QZS state is triggered. The effective pressure range of the proposed sandwich panel can be further programmed by stacking QZS beam lattices of different static load plateaus. The proposed design strategy stems solely from the structural geometry of the curved beams and is therefore materials-insensitive. The linear/inverse relationships between static loading feature and characteristic mechanical properties /geometrical parameters, and the stacking arrangement of lattice bring out the programmability of the panel's bearing capacity. The design strategy, together with the established database, provides a feasible approach for underwater sound insulation of equipment subjected to elevated pressures.