摘要
基于粘性流中的准平面波传播理论,推导获得催化载体的四极参数,使用有限元法计算载体两端连接空腔的传递矩阵,利用交界面处的声压和体积速度连续性条件求出催化转化器的四极参数,进而计算催化转化器的传递损失,分析载体参数对催化转化器声学性能的影响。
Based on the quasi-plane wave propagation theory in viscous flow, the four-pole parameters of the catalytic carrier are derived. The finite element method is employed to calculate the transfer matrices for the cavities connected to both ends of the carrier. The four-pole parameters of catalytic converter are obtained by using the continuities of sound pressure and particle velocity, and then the transmission loss is determined. The influence of carrier＇ s parameters on the acoustic attenuation performance of the catalytic converter are analyzed and discussed.
出处
《噪声与振动控制》
CSCD
北大核心
2009年第2期127-129,136,共4页
Noise and Vibration Control
关键词
声学
催化转化器
声学特性
传递矩阵法
有限元法
acoustics
catalytic converter
acoustic characteristics
transfer matrix method
finite element method
