金属橡胶材料单层结构吸声特性研究  

Study on the Sound Absorption Performance of Single Layer Structure Metal Rubber Material

作　　者：武国启[1] 闫辉[1] 夏宇宏[1] 姜洪源[1] E.A.Izzheurov 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001 [2]Samara State Aerospace University

出　　处：《稀有金属材料与工程》2010年第11期1923-1927,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50675042;50705016);国家博士后科学基金(20080430926)

摘　　要：从理论上研究了金属橡胶材料单层结构吸声特性。根据金属橡胶材料声学特性参数计算式,推导出两种基本单层吸声结构——置于刚性墙和带有空气层吸声结构的声阻抗率和吸声系数计算式。确定了流阻率是决定金属橡胶材料声学特性的基本参数。分析了材料厚度、流阻率及空气层厚度对两种吸声结构的吸声性能影响关系,建立了金属橡胶材料单层吸声结构第一共振频率的计算方法。结果表明:通过优化设计材料厚度、流阻率及空气层厚度可有效提高金属橡胶材料单层吸声结构的吸声性能。The sound absorption performance of single layer metal rubber (MR) material was theoretically investigated. The formulae were deduced to calculate the acoustic impedance rate and sound absorption coefficient for two kinds of basic single-layer absorption structure in rigid wall and with air layer. The flow resistivity is the main parameter to determine the sound absorption performance of MR material. The influence of the thickness of MR layer, flow resistivity and thickness of the air layer on the sound absorption performance of the two kinds of structures was analyzed. The method for calculating first resonant frequency for single layer structure MR material was presented. The results indicate that the optimization of thickness of MR material, flow resistivity and the thickness of the air layer is helpful to improve the sound absorption performance of the single layer structure MR material.

关 键 词：金属橡胶材料 单层结构 吸声结构 特性研究 Layer Structure Performance Sound Absorption 空气层 吸声性能 声学特性参数 气层厚度 材料厚度 流阻 计算式 优化设计 性能影响 吸声系数 吸声特性 声阻抗率 结构第一 

分 类 号：TB535.2[理学—物理]