Noise optimization design on the exhaust muffler of a special vehicle based on the improved genetic algorithm

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	Noise optimization design on the exhaust muffler of a special vehicle based on the improved genetic algorithm
	Xie, Xiao-zheng
刊名	JOURNAL OF VIBROENGINEERING
	2015-12
卷号	17 期号:8 页码:4625-4639
关键词	anechoic box muffler sound elimination ability transmission loss improved structure
ISSN号	1392-8716
英文摘要	Overall sound pressure levels of the driver' right ear were tested and compared with the second and fourth order sound pressure levels. As shown from the result, the roar at 1400 rpm is mainly caused by the excessive noise which is from the second order. In order to verify this opinion, an anechoic box was located at the end of a special vehicle and the corresponding noise was then tested, which was compared with the previous results. It is indicated that the peak noise at 1400 rpm has been significantly improved after installing the anechoic box, which further shows that the roar at this position is mainly caused by sound deadening capacity of the exhaust system at low frequency. Then, the finite element method was applied to compute transmission loss of mufflers, which was compared with the experimental results. They are consistent with each other, and this shows that the numerical model for computing transmission loss is reliable and can be used for the subsequent analysis. Based on the original muffler, its structure was optimized by the improved genetic algorithm. The verified model was then adopted to compute transmission loss of the optimized mufflers, whose results were also compared with the original results. As shown from the results, transmission loss of the optimized structure has been significantly increased. In order to verify the actual effects of the optimization scheme, the samples were produced for the actual experiments, whose result was compared with the original value. The peak noises at both the driver's right ear and the exhaust tailpipe have been significantly improved, indicating that the proposed optimization in the paper is real and effective.
资助项目	Science Research Project of High Education Institutions in Gansu Province[2014A-038] ; Natural Science Foundation of Gansu Province[1212RJYA010] ; Young Teacher Training Plan of Lanzhou University of Technology[2014-15]
WOS研究方向	Engineering
语种	英语
出版者	JOURNAL VIBROENGINEERING
WOS记录号	WOS:000367463200047
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33912]
专题	兰州理工大学
通讯作者	Xie, Xiao-zheng
作者单位	Lanzhou Univ Technol, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Xie, Xiao-zheng. Noise optimization design on the exhaust muffler of a special vehicle based on the improved genetic algorithm[J]. JOURNAL OF VIBROENGINEERING,2015,17(8):4625-4639.
APA	Xie, Xiao-zheng.(2015).Noise optimization design on the exhaust muffler of a special vehicle based on the improved genetic algorithm.JOURNAL OF VIBROENGINEERING,17(8),4625-4639.
MLA	Xie, Xiao-zheng."Noise optimization design on the exhaust muffler of a special vehicle based on the improved genetic algorithm".JOURNAL OF VIBROENGINEERING 17.8(2015):4625-4639.