Modal Parameter Identification Based on Hilbert Vibration Decomposition in Vibration Stability of Bridge Structures

Table 3

Identification results for various SNRs with low-energy mode.

SNR (db)	f1	f2	ξ1	ξ2
+∞	2.00	4.00	0.010	0.010
40	2.00	4.00	0.010	0.010
30	2.00	3.95	0.010	0.010
20	2.00	3.91	0.010	0.011
10	2.00	3.82	0.010	0.012

Note. ξ₁ and ξ₂ are the modal damping and f₁ and f₂ are the modal frequency.