噪声与振动控制2016，Vol.36Issue(5)：82-85,4.DOI:10.3969/j.issn.1006-1335.2016.05.017
汽车排气系统低频噪声分析与结构优化
Low Frequency Noise Analysis and Structure Optimization of Automotive Exhaust Systems
耿鹏飞 1张延超 2耿旭贞 1范永恒2
作者信息
- 1. 长城汽车股份有限公司 技术中心，河北 保定 071000
- 2. 河北省汽车工程技术研究中心，河北 保定 071000
- 折叠
摘要
Abstract
Model for engine working process and exhaust muffler coupling simulation of a car is established with GT-POWER software and the acoustic characteristics and aerodynamics performance of the exhaust muffler are computed. The reason of large low-frequency noise of the exhaust tailpipe is found. Muffler structure optimization strategy is proposed based on the simulation results. Then, the full vehicle exhaust tailpipe noise test is conducted to validate the proposal. Test results show that, at low rotary speed, the muffler insertion loss is increased by 5 dB (A)-7 dB (A) after the optimization, the overall second order noise is reduced, and the low frequency noise is reduced significantly.关键词
声学/排气消声器/低频噪声/声学性能/空气动力学性能/结构优化Key words
acoustics/exhaust muffler/low frequency noise/acoustic characteristics/aerodynamic performance/structure optimization引用本文复制引用
耿鹏飞,张延超,耿旭贞,范永恒..汽车排气系统低频噪声分析与结构优化[J].噪声与振动控制,2016,36(5):82-85,4.
