汽车净化消声器陶瓷蜂窝载体消声机理的理论及试验研究

A Study on Theory and Experiment of Sound Muffling Mechanism of ceramic Beehive Carrier for Motor Vehicle Purified Exhaust Muffler

基于多孔吸声材料的理论及声学传递矩阵理论,分析了目前广泛应用于汽车净化消声器中的陶瓷蜂窝载体的消声机理,给出了其声学传递矩阵,并分析了影响其声学性能的几个主要因素。对传声损失进行了模拟计算,计算结果与实测结果基本一致。

Sound muffling mechanism widely applied to ceramic beehive carrier currently for motor vehicle exhaust emission purication muffler are analysed and its acoustic transmitting matrix is give out based on the theory of multi-hole acoustic absorbtive material and theory of acoustic transmitting matrix , and several principal factors which affect its acoustic property are also analysed. Simulating computation of sound transmitting loss has been carried out,of which the result is practically the same as that by substantial measurement#.