一种实验模态分析方法及其在卫星仪器舱段模态分析中的应用

A METHOD OF EXPERIMENT MODAL ANALYSIS AND ITS APPLICATION IN THE MODAL ANALYSIS OF SATELLITE INSTRUMENT SECTION

本文讨论一种利用实验数据识别模态参数的方法,并介绍了它在卫星仪器舱段模态分析中的应用。 这种方法即所谓模态洗去法,当识别某阶固有频率时把其它阶振型从响应方程中分离出去。在这种方法中,由于模态分离,要识别的参数的数量比其它方法少得多。

In this paper, a method that identifies the modal parameters by means of testing data is described, and then its application in the modal analysis of satellite instrument section is introduced. The method is so-called washing mode method, which separates other modes of vibration from response in equation when a certain natural frequency is identified. Because of the partation of the modes, the number of parameters to be identified in this methodis much less than that in other methods.