基于相干分析的复杂船舶系统噪声源识别方法研究
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摘要
首先介绍常相干分析、偏相干分析和重相干分析等相干分析理论;然后针对复杂的船舶机械系统,提出多输入单输出系统低频线谱噪声源识别和分离方法;接着基于典型船舶系统振动噪声测试结果,开展系统低频线谱噪声源的识别和分离,得到系统主要低频线谱的来源。实际工程应用表明,研究提出的噪声源识别方法,可以提高工程中振动噪声问题治理的效率和准确性,为复杂船舶系统噪声源治理提供有力支撑。
The concept and theory of coherence analysis techniques, such as conventional coherence analysis, partial coherence analysis and multiple coherence analysis, are introduced. Aiming at complicated mechanical systems of ships, an identification and separation method for low-frequency line-spectrum noise sources is derived for multi-input and singleoutput systems. Based on the practical vibration and noise testing results during the operation of a typical ship mechanical system, the proposed method is applied to identify and separate the sources of the underwater line spectrum noise.Engineering applications show that the proposed method can improve the efficiency and accuracy in dealing with abnormal noise problems of ship complicated mechanical systems.
The concept and theory of coherence analysis techniques, such as conventional coherence analysis, partial coherence analysis and multiple coherence analysis, are introduced. Aiming at complicated mechanical systems of ships, an identification and separation method for low-frequency line-spectrum noise sources is derived for multi-input and singleoutput systems. Based on the practical vibration and noise testing results during the operation of a typical ship mechanical system, the proposed method is applied to identify and separate the sources of the underwater line spectrum noise.Engineering applications show that the proposed method can improve the efficiency and accuracy in dealing with abnormal noise problems of ship complicated mechanical systems.
引文
[1] ROTH P R. Effective measurements using digital signal analysis[J]. IEEE Spectrum,1971(8):62-70.
[2] KOSS L L. Identification of transient sound sources on a punch press[J]. Journal of Sound and Vibration, 1974,34(1):11-34.
[3] BENDAT J S,PIERSOL A G. Engineering application of Correlation and Spectrum Analysis[M]. New York:John Wiley&Sons, 1980.
[4]杨德森.利用偏相干方法识别主要激励源[J].哈尔滨船舶工程学院学报,1994,15(3):7-10.
[5]宋晶.利用偏相干函数法识别汽车整车噪声源的研究[D]. 2006.
[6]许锐,朱显明,柯兵,等.源分离方法在船舶中的运用[J].中国舰船研究,2008(6).
[7]章林柯,何琳,朱石坚.潜艇主要噪声源识别方法研究[J].噪声与振动控制,2006,26(4):7-10.
[2] KOSS L L. Identification of transient sound sources on a punch press[J]. Journal of Sound and Vibration, 1974,34(1):11-34.
[3] BENDAT J S,PIERSOL A G. Engineering application of Correlation and Spectrum Analysis[M]. New York:John Wiley&Sons, 1980.
[4]杨德森.利用偏相干方法识别主要激励源[J].哈尔滨船舶工程学院学报,1994,15(3):7-10.
[5]宋晶.利用偏相干函数法识别汽车整车噪声源的研究[D]. 2006.
[6]许锐,朱显明,柯兵,等.源分离方法在船舶中的运用[J].中国舰船研究,2008(6).
[7]章林柯,何琳,朱石坚.潜艇主要噪声源识别方法研究[J].噪声与振动控制,2006,26(4):7-10.