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

Table 7

Extracted natural frequencies from measured data and calculated natural frequencies from FE models for cable number 1 (Hz).

Mode number	Upward-bound			Downward-bound
	Test	FEM	Error (%)	Test	FEM	Error (%)
1	0.47	0.46	−1.71	—	0.46	—
2	0.94	0.92	−1.87	0.92	0.92	0.48
3	—	1.14	—	—	0.94	—
4	1.38	1.38	−0.28	1.38	1.38	0.25
5	1.84	1.85	0.42	1.84	1.84	0.25
6	—	2.28	—	—	1.87	—
7	2.30	2.31	0.30	2.29	2.29	−0.20
8	2.76	2.77	0.19	2.75	2.75	−0.11
9	3.23	3.23	0.06	—	2.80	—
10	—	3.42	—	3.21	3.21	0.06
11	3.69	3.69	−0.01	3.67	3.67	−0.07
12	4.15	4.16	0.24	—	3.74	—
13	—	4.56	—	4.13	4.13	0.04
14	4.61	4.62	0.25	4.59	4.59	0.07
15	5.08	5.08	0.09	—	4.68	—
16	5.54	5.54	0.03	5.05	5.05	0.07
17	—	5.70	—	5.51	5.51	−0.02
18	6.00	6.00	0.08	—	5.61	—
19	6.46	6.46	−0.01	5.98	5.97	−0.15
20	—	6.84	—	6.44	6.43	−0.10

—: not extracted.