变腔深双层微穿孔板消声器的研究

A Study on Cavity-Depth-Changing Double-Microperferated-Panel Muffler

本文对变腔深双层微穿孔板消声器进行了研究,提出了一种新的设计方法:即根据吸声系数最大原理选定双层微穿孔板消声器的腔深值。这种方法拓宽了消声器的消声频带宽度,改善了消声器的消声性能。这种设计方法已经实践检验,取得了良好的效果,从而证明这种方法是可行的。同时,本文还对双层傲穿孔板消声器的失效频率进行了讨论。

In this paper, the cavity-depth-changing double-mieroperferated-panel muffler has been studied and a nwe design method has been put forward that is to select the eavity depth of double-microperferated-panel muffler according to the principle of maximum aconstic absorption coefficient. This method broadens the silence frequency bandwidth of muffler and improves its silence fuction. The design method has been practised and qained good effects and therefore is feasible. Meanwhile, the failure frequency of double microperferated-panel muffler has also been discussed in this paper.