论文期刊

Quantitative analysis for acoustic characteristics of porous metal materials by improved Kolmogorov’s turbulence theory




作者: Xiao Liang, Jiu Hui Wu, Guojian Zhou
发表/完成日期: 2017-10-06
期刊名称: Applied Acoustics
期卷: Vol.130, 2018
相关文章: Quantitative analysis for acoustic characteristics of porous metal materials by improved Kolmogorov’s turbulence theory.pdf   
论文简介
This paper investigates the sound absorbing property of porous metal materials quantitatively using turbulence
analogy model. Firstly, the improved Kolmogorov’s turbulence theory is obtained by catastrophe theory for the
first time, to our knowledge. Secondly, a quantitative turbulence analogy model is proposed though the improved Kolmogorov’s turbulence theory. Finally, this model is adopted to analyze the wave propagation inside
the porous metal materials. The quantitative relationship of energy spectrum density is fully obtained, which is
also related to the average pore diameter and porosity. With the increase of excitation frequency, the energy
spectrum density decreases with certain power law. And the energy increases with the increase of the average
pore diameter. Our theoretical results are consistent with the experimental results. Our study can provide a
feasible theoretical guidance for controlling the vibration and noise of porous metal materials.