噪声与振动控制Issue(5)：214-218,5.DOI:10.3969/j.issn.1006-1335.2014.05.046
锥管结构消声性能的有限元分析
Finite Element Analysis of Acoustic Attenuation Performance of Conical Silencing Structure
司斌 1陈剑 1李家柱1
作者信息
- 1. 合肥工业大学 噪声振动工程研究所，合肥 230009
- 折叠
摘要
Abstract
Acoustic performance and aerodynamic performance are two important indexes for muffler’s evaluation. Conical silencing structure has attracted more and more attentions for its low frequency acoustic and low flow-resistance characteristics. In this paper, using the finite element method and taking the transmission loss as the evaluation index, the influence of the structural parameters on the acoustic characteristics of the conical silencer is analyzed. The results show that when the cone angle increases, the anechoic band will extend in the direction to the high frequency. The length of the conical structure mainly affects the anechoic bandwidth, and the area ratio of the diffusion tube to the contraction tube mainly affects the peak of the transmission loss. Use of conical structure to expansion mufflers will change the transmission loss curve by moving the anechoic bandwidth, weakening the peak, and improving the attenuation performance at the through-frequency.关键词
声学/锥管结构/有限元法/结构参数/传递损失Key words
acoustics/conic silencing structure/finite element method/structural parameter/transmission loss分类
交通工程引用本文复制引用
司斌,陈剑,李家柱..锥管结构消声性能的有限元分析[J].噪声与振动控制,2014,(5):214-218,5.
