Operational Modal Analysis Based on Subspace Algorithm with an Improved Stabilization Diagram Method

Table 1

The analytically and experimentally determined natural frequencies and damping ratios.

Mode	FEA	PP	SSI-cov		MPC
	[Hz]	[Hz]	[Hz]	[%]
First vertical bending	2.16	2.08	2.10	0.594	0.876
First torsion	4.68	4.59	4.52	0.673	0.891
Second vertical bending	6.11	5.88	5.90	0.645	0.856
Third vertical bending	9.40	9.34	9.29	1.032	0.835