Damage Identification for Large Span Structure Based on Multiscale Inputs to Artificial Neural Networks

Table 1

The main natural frequencies of the intact shell structure.

𝑋 transitional			𝑌 transitional			𝑍 transitional
Mode	Period(s)	Mode mass participation factor	Mode	Period(s)	Mode mass participation factor	Mode	Period(s)	Mode mass participation factor
2	0.780	0.773	1	0.839	0.753	3	0.734	0.215
4	0.599	0.033	4	0.599	0.026	8	0.484	0.004
7	0.491	0.022	7	0.491	0.038	16	0.351	0.017
10	0.425	0.010	9	0.443	0.014	27	0.298	0.017
14	0.359	0.005	17	0.338	0.003	28	0.296	0.079
18	0.334	0.004	19	0.333	0.010	29	0.289	0.048