噪声与振动控制2017，Vol.37Issue(3)：203-206,215,5.DOI:10.3969/j.issn.1006-1355.2017.03.041
引入声全息技术的发动机噪声源识别试验研究
Experimental Study on Engine Noise Source Identification Based on Acoustic Holography
摘要
Abstract
Acoustic holography technique is applied to the experiment of noise source identification for a 3-cylinder gasoline engine. First of all, the transient 1m sound pressure level of the engine is tested. It is found that the noise radiation on the intake side is the largest. Then, acoustic holography test is carried out in the intake side. By analyzing the sound pressure nephogram and noise spectrum, it is found that the main noise source of the intake side locates in the generator area and the frequency band is between 1000 Hz and 2500 Hz. Afterward, a new experiment method combining near-field sound pressure method with surface vibration method is employed in the generator area to identify the precise location of the main noise source. The result shows that both the frequency bands of vibration peak and noise peak are all between 1000 Hz-2500 Hz that is the same as the frequency band detected by acoustic holograph method. It proves that the main noise source on the intake side is the generator. It is concluded that combining acoustic holography technique with traditional noise source identification methods can raise the efficiency of noise source identification and remedy the defect of low precision of identification in acoustic holography technique.关键词
声学/发动机噪声/声全息技术/近场声压法/表面振动法/噪声源识别Key words
acoustics/engine noise/acoustic holography/near-field sound pressure method/surface vibration method/noise source identification分类
交通工程引用本文复制引用
王守健,万里翔,杨明亮,高思奇,苏瑞强,丁渭平..引入声全息技术的发动机噪声源识别试验研究[J].噪声与振动控制,2017,37(3):203-206,215,5.基金项目
2016年中央高校基本科研业务费理工类科技创新资助项目(2682016CX032) （2682016CX032）
2015年四川省科技计划资助项目(2015GZ0126) （2015GZ0126）
