On the Use of Singular Vectors for the Flexibility-Based Damage Detection under the Assumption of Unknown Structural Masses

Table 4

Modal parameters identified by ERA, WS-TSVD-based algorithm, and RWS-TSVD-based algorithm on the undamaged frame, with reference to input accelerations of Figure 8.

Input	Mode	ERA		WS-TSVD		RWS-TSVD
		(a)	1	14.3482	−0.66	14.2788	−1.14	14.2788	−1.14
2	41.2713		+2.68	40.8269	+1.57	40.6176	+1.05
3	-		-	62.3920	+1.08	62.3920	+1.08
4	-		-	78.9325	+3.91	79.1417	+4.19
(b)	1	14.6804	+1.64	14.0746	−2.55	14.4463	+0.02
	2	39.4661	−1.81	41.4552	+3.14	39.9893	−0.51
	3	66.5500	+7.81	63.6487	+3.11	64.4856	+4.47
	4	-	-	74.5355	−1.87	77.0482	+1.43
(c)	1	14.4551	+0.08	14.4369	−0.04	14.4369	−0.04
	2	40.3869	+0.48	40.1722	−0.05	40.1722	−0.05
	3	64.5058	+4.50	-	-	63.3973	+2.70
	4	72.5101	−4.54	-	-	-	-