摘要
针对柴油机低频排气噪声的频率与强度很难准确地用理论计算等困难 ,试验研究了柴油机排气管内低频排气噪声信号与排气管壁上振动信号的相互关系 .结果表明 ,低频范围内 ,振动信号与噪声信号几乎呈现周期性的完全相干 ,在相干频率处振动信号能反映排气噪声的类周期性 .
It is difficult to calculate the diesel's low\|frequency exhaust noise frequency and intensity by use of theory, the coherence between exhaust noise signal and vibration signal on exhaust duct is studied through experiments in this paper. The result shows that the coherence of them is basically quasi\|periodic, and exhaust noise signal can be reflected by vibration signal on the coherent frequency.
出处
《海军工程大学学报》
CAS
2002年第2期29-30,42,共3页
Journal of Naval University of Engineering
