Free-Interface Modal Synthesis Based Substructural Damage Detection Method

Table 1

Convergent index 𝐸_𝑖 with different retained modes.

Group	1	2	3	4	5	6	7	8	9	10
Retained modes
𝑎	6	8	10	12	14	16	18	20	22	24
𝑏	12	14	16	18	20	22	24	26	28	30
𝐶	26859	24728	24514	23767	23447	23285	23182	23060	22952	22711
E (×10^−3)	86.2	53.1	31.4	13.6	6.9	4.4	5.3	4.7	10.6	3.7