汽车尾喉声学性能分析及改进

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中图分类号：U464.134.4；U467.493；TB115.1 文献标志码：B

Analysis and improvement on acoustic performance of automotive tailpipe

CHENGChun1，ZHANG Yihan

（1. School of Mechatronic Engineering，Jiangsu Normal University， Xuzhou 221116， Jiangsu，China； School of Mechatronicsand Vehicle Engineering，East China Jiaotong University，Nanchang 33O013，China

Abstract：To explore the sound-absorbing ability of the automotive tailpipe and further improve the noise reduction performance of the automotive exhaust noise suppresson system， a perforated tailpipe is designed.Based on finite element simulation，the energy transfer losss of ordinary and perforated tailpipe are obtained.By parameterization analysisthe 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 asan important supplement to exhaust noise suppression systems. The analysis results can provide ideas for the design of noise suppression tailpipes.

Key words： automotive tailpipe； exhaust noise； noise suppression unit； transmission loss；resonance

0 引言

发动机排气噪声是汽车主要噪声源之一，既影响车辆驾乘舒适性，又造成环境噪声污染。（剩余4108字）