基于管道声模态的SCR催化消声器传递损失分析  

Analyze of Transmission Loss of SCR Catalytic Muffler Based on Acoustic Mode of Pipeline Method

作　　者：袁磊 韩震 业德明 乔曌 严飞 Yuan Lei;Han Zhen;Ye Deming;Qiao Zhao;Yan Fei(AnHui JiangHuai Automobile group Co.,LTD.Technology Centre,Anhui Hefei 230601)

机构地区：[1]安徽江淮汽车集团股份有限公司技术中心,安徽合肥230601

出　　处：《汽车实用技术》2018年第18期151-154,共4页Automobile Applied Technology

摘　　要：柴油机SCR选择性催化还原技术是欧五排放标准的重要技术路线之一,SCR催化消声器实现柴油机尾气净化和排气减噪的双重功能。文章应用三维声学软件Virtual.Lab,基于管道声模态法结合传递导纳函数,通过对常温及高温下的SCR消音器的传递损失进行计算得到其具有较好的消声性能,为优化和改进排气系统的声学性能提供仿真技术支持。Selective catalytic reduction （SCR） technology for diesel engine is one of the main technical routes for satisfying the Euro 5 emission standard. The dual-function of exhaust gas purification and noise reduction can be achieved by SCR catalytic muffler. In this paper, three-dimensional acoustics software Virtual. Lab was used to evaluate the noise elimination performance by employing acoustic mode of pipeline analysis combined with transfer admittance function. Simulation technology supports can be provided to improve acoustic performance of exhaust system.

关 键 词：管道声模态 消音棉 传递导纳函数 SCR消音器 传递损失 

分 类 号：U467[机械工程—车辆工程]