文档介绍：基于探讨二维周期性块状阻尼结构
对薄板声辐射特性的影响
田丰
(湖北工业大学湖北省汽车结构振动与噪声控制工程研究中心,武汉 430068)
摘要在薄板上敷设粘弹性阻尼材料的方法,由于其简单可行,已经成为在抑制薄板振动的重要途径之一。
随着研究的不断深入,更多的阻尼敷设方式在抑制薄板振动方面已经被证明要优于传统的自由阻尼结构,
其中就包括基于声子晶体理论提出的周期阻尼结构。本文借助有限元和边界元的数值算法,探讨薄板敷设
二维周期块状阻尼结构对其声辐射特性的影响。验证了在特定频段内,薄板敷设二维周期块状阻尼结构的
薄板辐射声能量要小于传统敷设整体自由阻尼结构,并分别分析了阻尼敷设面积、块状阻尼周期数以及块
状阻尼截面形状等参数对薄板声辐射特性的影响。
关键词声学、声辐射、二维周期结构、块状阻尼
中图分类号:TB535 文献标识码:A 文章编号:
Numerical calculation on sound radiation of thin plate based on two-dimensional
periodic damping structure
TIAN FENG
(Hubei University of technology,Automotive Structure Vibration and Noise Control Engineering Research Center of Hubei Province,
Wuhan 430068,China)
Abstract The method of plate based on viscoelastic damping materials,as it is simple and
feasible,has became an important way to control the vibration of research continues, more
laying has proved superior to the traditional free damping structure,including periodic damping
structure based on the theory of phonon method on sound radiation of plate based
on two-dimensional periodic damping by FEM and BEM in this in particular
frequency band,the sound radiation power of plate based on two-dimensional periodic damping is less
than traditional free damping structure,and analysis the effect of damping laying area、the periodicity
and cross