Improved Continuous Wavelet Transform for Modal Parameter Identification of Long-Span Bridges

Table 6

Continuous wavelet transform algorithm Oujiang Bridge modal parameter identification result.

Order		Finite element results	Results of CWT algorithm		Frequency error (%)
		Frequency (Hz)	Frequency (Hz)	Damping ratio (%)
Vertical bend	1	0.447	0.457	1.11	2.29
	2	0.677	0.682	1.13	0.73
	3	1.077	1.086	1.29	0.83
Lateral bend	1	0.318	0.321	0.90	0.86
	2	0.524	0.531	1.19	1.34
	3	0.617	0.628	1.16	1.66
	4	1.067	1.075	0.87	0.77
Torsion	1	2.455	2.513	0.13	2.34
	2	4.742	5.008	0.11	5.61