共振式消声器腔体形状对共振频率影响的修正

Effect Correction of the Cavity Geometry of a Resonant Silencer on the Resonance Frequency

以三维有限元计算结果为基础,针对计算简单的古典集中参数频率计算公式,提出了新的连接管长度修正公式,以估算具有不同共振腔深宽比的消声器的共振频率,解决了古典集中参数频率计算公式存在估算精度较低甚至在某些共振腔尺寸条件下失效的问题.

A new connector end correction is presented on the basis of the three dimensional finite element results, which is for the lumped-parameter formula used to predict the resonance frequency of a silencer having various depths to width ratio of the cavity. The problems of the low accuracy are solved even no use for some cavity dimensions of the lumped-parameter formula.