水下多层均匀材料垂直入射的声特性分析  

Analysis of Sound Characteristics of a Normal Incidence Plane Wave on Isotropic Symmetric Plate in Water

作　　者：刘志宏[1] 盛美萍[1] 

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《噪声与振动控制》2005年第2期11-13,共3页Noise and Vibration Control

基　　金：国家自然科学基金项目(编号:50375121);全国优秀博士论文基金资助项目(编号:200049)

摘　　要：采用传递矩阵方法研究了材料特性、几何参数对水下多层均匀复合结构声学性能的影响,给出了吸声系数的理论公式并开展了计算仿真。研究表明:不同橡胶材料对复合结构吸声性能有显著影响;增加复合结构层次有利于改善结构吸声特性,特别是改善低频吸声特性。In this paper, the sound absorption of underwater multi-layered composite structure influenced by material performance and geometrical　parameters is discussed using transmission matrix. Theoretical formula of absorption coefficient is given and emulation calculation is developed. Different absorption materials have great influence on its absorption performance. Increasing layers of the multi-layered structure are propitious to improve its absorption performance. Especially improve its characteristic at low frequency.

关 键 词：声学 吸声层 计算 噪声治理 水下 

分 类 号：O42[理学—声学] TB564[理学—物理]