• CN:11-2187/TH
  • ISSN:0577-6686

›› 2010, Vol. 46 ›› Issue (19): 70-77.

• 论文 • 上一篇    下一篇

金属橡胶材料非线性吸声特性研究

姜洪源;武国启   

  1. 哈尔滨工业大学机电工程学院
  • 发布日期:2010-10-05

Nonlinear Sound Absorption Performance of Metal Rubber Material

JIANG Hongyuan;WU Guoqi   

  1. School of Mechatronics Engineering, Harbin Institute of Technology
  • Published:2010-10-05

摘要: 理论及试验研究适用于腐蚀性介质、大温差等恶劣环境吸声降噪需要的金属橡胶材料非线性吸声特性。根据金属橡胶材料线性理论和Forchheimer非线性修正方法,建立金属橡胶材料非线性有效密度计算式及声质点速度方程。由金属橡胶材料置于刚性墙和带有空气层的两种吸声结构边界条件,建立求解金属橡胶材料吸声参数的吸声模型。通过计算及试验测量,分析材料结构参数和入射声压级对金属橡胶材料非线性吸声特性影响关系。研究结果表明,在高声压级声波作用下,非线性吸声特性曲线变化规律与低声压级作用下呈现出的线性特性相近,不同入射声压级和结构参数对金属橡胶材料非线性吸声特性影响不同,材料厚度和静态流阻率越大,金属橡胶材料非线性吸声效应越小。

关键词: 非线性吸声特性, 建模, 金属橡胶

Abstract: Nonlinear sound absorption performance of metal rubber material under corrosive medium, big temperature change, and other extremely severe conditions is presented. Nonlinear complex density and particle velocity equation are developed based on metal rubber (MR) material linear theory and Forchheimer’s correction method. A model for solving sound absorption parameters is developed under two sound absorption boundary conditions known as hard backed walls and samples with air layers. Relationship between structure parameters as well as incidence pressure level and nonlinear sound absorption performance is studied by theoretical calculation and experimental approach. The results indicate that nonlinear sound absorption performance of MR varies with incidence pressure level and structure parameters, respectively. With the increase of the thickness and static flow resistivity of MR samples, the MR material exhibits much less nonlinear sonic effect.

Key words: Metal rubber, Modeling, Nonlinear sound absorption performance

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