Scaling Mode Shapes in Output-Only Structure by a Mass-Change-Based Method

Table 2

Relative error between the given mass matrix and the identified mass matrix .

DOF	1	2	3	4	5	6	7	8	9	10
(kg)	3.8	13.0	4.6	3.8	0.6	1.8	0.6	18.8	3.2	2.0
(kg)	3.820	13.094	4.622	3.826	0.628	1.843	0.609	18.991	3.231	2.022
Error (%)	0.52	0.73	0.48	0.69	4.69	2.41	1.56	1.02	0.96	1.10