Structural Damage Detection by Power Spectral Density Estimation Using Output-Only Measurement

Figure 12

Experimental results: (a) acceleration responses in time-domain, (b) absolute values of FFT in frequency-domain, (c) PSE curves, (d) maximum values of FFT nearby the first resonance frequency, (e) their curvature, (f) curve of maximum PSE, and (g) its curvature.

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(b)

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(e)

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(g)