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Sound transmission across lightweight all-metallic sandwich panels with corrugated cores

期刊名称：Chinese J. Acous.
时间：0
页码：231-243
语言：英文
分类：O326[理学—一般力学与力学基础;理学—力学] G633.41[文化科学—教育学]
作者机构：[1]MOE Key Laboratory for Strength and Vibration, School of Aerospace, Xi'an Jiaotong University Xi'an 710049
相关基金：This work was supported by the National Basic Research Program of China （2006CB601202）, the National 111 Project of China （B06024）, the National Natural Science Foundation of China （10572111,10632060） and the National High Technology Research and Development Program （2006AA03Z519）.
相关项目：物理波在超轻多孔材料和结构中的传播和吸收

关键词： with, 细胞模型, 集中质量, 面板结构, 传输损耗, 夹芯板, STL, 空间谐波

中文摘要：

通过有弄皱的核心的所有金属性的三明治面板的声音的传播用空间泛音方法被调查。三明治面板作为面板到一致地分布式的翻译弹簧和旋转弹簧连接了的二平行被建模，与作为 lumped 质量拿的核心表的团。基于面板结构的频率，一个联合起来的房间模型被开发提供核心的有效翻译、旋转的僵硬。检查模型的有效性，与空气洞，和分析预言学习双面板结构的健全屏蔽性质首先被使用与存在试验性的数据同意很好。模特儿然后被雇用确定在越过有弄皱的核心的三明治面板的健全传播损失(STL ) 上的 facesheet 和核心表之间的健全发生角度和倾斜角度的影响。结果证明倾斜角度在 STL 上有重要效果，由改变倾斜角度避免 STL 剧降是可能的。而且，有弄皱的核心的三明治面板对有小发生角度的声波的屏蔽更合适，这被发现。

英文摘要：

The transmission of sound through all-metallic sandwich panels with corrugated cores is investigated using the space-harmonic method. The sandwich panel is modeled as two parallel panels connected by uniformly distributed translational springs and rotational springs, with the mass of the core sheets taken as lumped mass. Based on the periodicity of the panel structure, a unit cell model is developed to provide the effective translational and rotational stiffness of the core. To check the validity of the model, it is used first to study the sound insulation properties of double-panel structures with air cavity, and the analytical predictions agree well with existing experimental data. The model is then employed to quantify the influence of sound incidence angle and the inclination angle between facesheet and core sheet on sound transmission loss （STL） across sandwich panels with corrugated cores. The results show that the inclination angle has a significant effect on STL and it is possible to avoid STL dips by altering the inclination angle. Moreover, it is found that sandwich panels with corrugated cores are more suitable for the insulation of sound waves having small incidence angles.

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