Automated Modal Identification Based on Improved Clustering Method

Table 1

Soft validation criteria.

Value	Physical definition	Ideal physical	Ideal mathematical
	Distance between the eigenvalues of modes i and j	0	1
	Relative frequency difference	0	1
	Relative damping ratio difference	0	1
	Modal assurance criterion	1	0
	Modal transfer norm	Large (1)	0
	Relative difference in modal transfer norm between modes	0	1
	Modal phase collinearity	1	0