汽车尾喉声学性能分析及改进  

Analysis and improvement on acoustic performance of automotive tailpipe

作　　者：程春 张轶涵 CHENG Chun;ZHANG Yihan(School of Mechatronic Engineering,Jiangsu Normal University,Xuzhou 221116,Jiangsu,China;School of Mechatronics and Vehicle Engineering,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]江苏师范大学机电工程学院,江苏徐州221116 [2]华东交通大学机电与车辆工程学院,南昌330013

出　　处：《计算机辅助工程》2024年第3期24-27,共4页Computer Aided Engineering

基　　金：江苏省高校自然科学基金(18KJD460003)。

摘　　要：为挖掘汽车尾喉的消声能力,进一步提高汽车排气消声系统的降噪性能,设计一种穿孔式尾喉。基于有限元仿真,分别得到普通尾喉和穿孔式尾喉的传递损失。通过参数化分析,获得穿孔式尾喉声学性能变化的规律。结果表明:改变穿孔率和穿孔管直径,能够改变穿孔式尾喉的消声频带和消声能力;穿孔式尾喉在特定频带内具有较好的声学性能,可以作为排气消声系统的重要补充。分析结果为可消声尾喉的设计提供思路。To explore the sound-absorbing ability of the automotive tailpipe and further improve the noise reduction performance of the automotive exhaust noise suppression system,a perforated tailpipe is designed.Based on finite element simulation,the energy transfer losses of ordinary and perforated tailpipe are obtained.By parameterization analysis,the law of acoustic performance changes of perforated tailpipe is obtained.The results show that the sound reduction frequency band and sound reduction ability of the perforated tailpipe can be changed by changing the perforation rate and perforation tube diameter;perforated tailpipe has good acoustic performance in specific frequency bands and can serve as an important supplement to exhaust noise suppression systems.The analysis results can provide ideas for the design of noise suppression tailpipes.

关 键 词：汽车尾喉 排气噪声 消声单元 传递损失 共振 

分 类 号：U464.134.4[机械工程—车辆工程] U467.493[交通运输工程—载运工具运用工程] TB115.1[交通运输工程—道路与铁道工程]