用声信号识别构件模态频率

A Technique of Modal Frequency Identification by Radiated Sound Measurement

本文提出一种新的模态分析方法—用声信号识别构件模态频率.传声器不与结构表面接触,消除了附加质量的影响.同时,结合时间序列谱分析法改善并提高了响应谱的精度.

This paper presents a new method of modal analysis, that is, a modal frequency identification technique for a structure by radiated sound measuring. As the microphone does not get in touch with the measured body, it eliminates the effect of additional mass. At the same time, the method of the spectrum estimation by time seveis analysis is used to improve and obtain higher accuracy of response spectrum.