Identification of complex diesel engine noise sources based on coherent power spectrum analysis

被引：41

作者：

Shu, Gequn ^{[1
]}

Liang, Xingyu ^{[1
]}

机构：

[1] Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2007年 / 21卷 / 01期

关键词：

diesel engine; coherent analysis; power spectrum; hierarchy diagnosis;

D O I：

10.1016/j.ymssp.2006.06.001

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper presents an identification of complex diesel engine noise sources based on coherent power spectrum analysis. Noise sources identification is essential for making noise reduction strategies. The author adopts methods of hierarchy diagnosis together with coherent power spectrum analysis to identify complex noise sources of diesel engine. In investigation of the noise sources, the hierarchy tree and judgment matrix are given. Through noise sources identification, the main part of radiating surface noise is found. The result shows that the noise of low-frequency belt is mainly machinery noise from oil pump, gear and valve mechanism, etc., and it is radiated mostly from thin-walled part like gear cover and valve cover etc., while the noise of high-frequency belt is mainly combustion noise and oil pan is identified as the main part of noise reduction. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：405 / 416

页数：12

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