Dynamic Behavior of Supported Structures from Free-Free Modal Tests Using Structural Dynamic Modification

Table 6

Experimental and predicted natural frequencies for the fixed-free configuration.

	Weak axis (Y)			Strong axis (X)
Mode	Natural frequencies (Hz)		Error	Natural frequencies (Hz)		Error
	Experimental frequency	Frequency predicted (Equation (9))	Experimental − predicted (%)	Experimental frequency	Frequency predicted (Equation (9))	Experimental − predicted (%)
1	10.93	9.55	12.60	15.617	15.67	0.33
2	67.69	78.09	15.36	103.25	117.87	14.16
3	186.88	185.90	0.53	296.6	305.81	3.11
4	362.91	377.11	3.91	573.72	611.66	6.61
5	570.67	1075.59	>100.00	1016.21	1064.90	>100.00
6	825.29	2291.05	>100.00	—	2280.30	>100.00