具有黏弹性夹层的纤维金属层板空气声传输损失与阻尼特性  

Airborne sound transmission loss and damping characteristics of fiber metal laminates with constrained viscoelastic interlayers

作　　者：王博 闵鹤群[1,2] 曲婷[1,2] WANG Bo;MIN Hequn;QU Ting(School of Architecture,Southeast University,Nanjing 210096;Key Laboratory of Urban and Architectural Heritage Conservation,Southeast University,Nanjing 210096)

机构地区：[1]东南大学建筑学院,南京210096 [2]东南大学城市与建筑遗产保护教育部重点实验室,南京210096

出　　处：《声学学报》2025年第2期233-245,共13页Acta Acustica

基　　金：国家自然科学基金项目(51408113);江苏省自然科学基金项目(BK20140632)资助。

摘　　要：基于一般高阶剪切变形理论和局部坐标映射原理,提出了一种高阶混合逐层计算方法,以精确分析含黏弹性夹层的纤维金属层板等复杂复合层板空气声传输损失和阻尼特性。该方法可独立选择几何层的三维位移场、准确表征离散层信息,且允许将具有相似动力学特性的多个几何层等效为单层而提高计算效率。将黏弹性材料的频率特性引入声固耦合控制方程,采用迭代模态应变能法求解复特征值。通过对比已发表的实验和计算结果,该方法的准确性得以验证。分析了不同入射角度的平面波激励下纤维金属层板在10~2000 Hz窄带的声传输损失,并讨论了阻尼的贡献机理。结果表明,黏弹性约束层阻尼可以显著提升复合层板在共振频率处的隔声性能。A sublaminate layer-wise approach is proposed based on the generalized high-order shear deformation theory coupled with the local coordinate mapping principle,so as to accurately evaluate the airborne sound transmission loss and damping characteristics of complex composite laminates with a constrained viscoelastic interlayer.The method not only allows for the independent selection of three-dimensional displacement fields for each geometric layer,which can effectively represent the discrete layer information,but also can equivalently condense multiple geometric layers with similar dynamic characteristics into a single layer to enhance computational efficiency.The approach also incorporates the frequency-dependent properties of viscoelastic materials into the acoustic-structural coupling equations,by employing an iterative modal strain energy method to solve complex eigenvalues.This approach is verified through comparisons with previously published experimental and computational results.This study investigates the sound transmission loss of fiber metal laminates under planar wave excitation at various incident angles at narrow frequency bands from 10 Hz to 2000 Hz,for discussing the damping contribution mechanism.The results show that constrained layer damping can significantly enhance sound insulation performance of the structure at resonance frequencies.

关 键 词：纤维金属层板 约束层阻尼 声传输损失 逐层法 高阶剪切变形理论 

分 类 号：TB333[一般工业技术—材料科学与工程]