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

Table 5

Main frequency and mode of vibration.

Order		Frequency (Hz)	Mode of vibration
Vertical bend	1	0.447	Symmetrical vertical bend −1
	2	0.677	Antisymmetric vertical bend −1
	3	1.077	Symmetrical vertical bend −2
	4	1.430	Antisymmetric vertical bend −2
	5	1.575	Symmetrical vertical bend −3
	6	1.745	Symmetrical vertical bend −4
	7	1.808	Antisymmetric vertical bend −3
	8	1.979	Antisymmetric vertical bend −4
Lateral bend	1	0.318	Symmetrical lateral bend −1
	2	0.524	Antisymmetric lateral bend −1
	3	0.617	Symmetrical lateral bend −2
	4	1.067	Antisymmetric lateral bend −2
	5	1.677	Symmetrical lateral bend −3
	6	1.992	Symmetrical lateral bend −4
Torsion	1	2.455	Symmetrical torsion −1
	2	4.742	Antisymmetric torsion −1