Field Application of Cable Tension Estimation Technique Using the h-SI Method

Table 8

Extracted natural frequencies from measured data and calculated natural frequencies from FE models for cable number 44 (Hz).

Mode number	Upward-bound			Downward-bound
	Test	FEM	Error (%)	Test	FEM	Error (%)
1	—	0.75	—	—	0.76	—
2	—	1.33	—	—	1.33	—
3	1.50	1.51	0.50	1.51	1.51	0.33
4	2.26	2.26	0.06	2.27	2.27	0.05
5	—	2.66	—	—	2.67	—
6	3.01	3.02	0.24	3.02	3.02	0.00
7	3.77	3.77	−0.03	3.78	3.78	−0.12
8	—	3.99	—	—	4.00	—
9	4.52	4.52	−0.02	4.55	4.54	−0.13
10	5.29	5.28	−0.18	5.31	5.29	−0.38
11	—	5.32	—	—	5.34	—
12	6.03	6.03	−0.05	6.05	6.05	0.02
13	—	6.65	—	—	6.67	—
14	6.79	6.79	−0.03	6.82	6.81	−0.21
15	7.55	7.54	−0.19	7.58	7.56	−0.27
16	—	7.99	—	—	8.01	—
17	8.31	8.3	−0.09	8.33	8.32	−0.17
18	9.06	9.05	−0.09	9.09	9.07	−0.25
19	—	9.32	—	—	9.35	—
20	9.81	9.81	−0.03	9.83	9.83	−0.02

—: not extracted.