A new structure damage indicator was expatiated which was obtained through calculating the correlation function of structure response under white noise.

阐述了一种新型结构损伤指数，该指数通过计算白噪声激励下结构响应的相关函数得到。

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It is shown that the OAG of the USC (or the LSC) is a non-monotonic function of the strength and correlation time of the noise as well as the frequency of the USC (or the LSC).

研究表明，上(或下)边频分量输出幅度增益是噪声的强度和相关时间以及上(或下)边频分量频率的非单调函数。

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The time-domain filter can then be used to select the narrow central portion of the cross correlation function (CCF), capturing virtually all of the signal but rejecting most of the noise.

对相关函数进行时域滤波，挑选出互相关函数中窄信号自相关函数部分，去掉剩余的大部分噪声能量，得到加窗互相关函数（CCF）。

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