Damage Detection and Quantification Using Transmissibility Coherence Analysis

Table 4

The comparison of transmissibility, TC, and FRF coherence in peak change.

State	Indicator	Frequency shift (Hz)				Amplitude value
		Peak 1	(%)^*	Peak 2	(%)^*	Peak 1	(%)^*	Peak 2	(%)^*
#1	(5, 2)	47.54	—	69.92	—	50.18	—	28.95	—
#6		47.15	−0.82	65.47	−6.36	46.58	−7.17	27.62	−4.59
#7		46.25	−2.71	60.42	−13.59	47.42	−5.50	28.94	−0.03
#1	TC (5, 2)	47.58	—	70.08	—	0.54	—	0.18	—
#6		47.07	−1.07	65.55	−6.46	0.36	−33.33	0.21	0.17
#7		46.25	−2.80	60.63	−13.48	0.26	−51.85	0.52	188.89
#1	FRFC (5, 1)	54.88	—	71.88	—	0.83	—	0.80	—
#6		54.96	0.15	67.19	−6.52	0.76	−8.43	0.86	7.5
#7		54.69	−0.35	62.15	−13.54	0.78	−6.02	0.89	11.25

^*Increase from the baseline “State #1.”