关键词: 声学, 四极子参数, 扩张室式消声器, 内插管消声器, 穿孔管消声器, SIDLAB

Abstract: According to the different types of mine truck reserved different space for muffler, respectively discussed the different parameters：Length to diameter ratio、Expansion ratio、Perforation rate、Intubation length effect to resistance muffler selection. Under different parameters, transmission loss and the pressure loss was calculated by using SIDLAB software. It was showed that: the change of parameters have a great impact on the maximum amount of noise reduction, removal passing frequency, perforated tube muffler can achieve the most ideal silencing effect. When one interpolation is the half of expansion cavity length, the other interpolation 1/4 can achieve the best effect. For a 290T mine car muffler reserved space characteristics, through the pressure loss and transmission loss comparison, selected a suitable muffler.