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

Table 3

Natural frequencies of the pinned-free beam with respect to the strong axis (X).

Mode	Natural frequency (Hz)			Error (%)
	Experimental	Predicted (Equation (9))	Numerical	Experimental − predicted	Experimental − numerical
1	0.64	0	0	—	—
2	89.01	90.64	89.40	1.80	0.44
3	279.51	286.53	289.72	2.45	4.65
4	568.4	570.78	604.51	0.42	6.35
5	939.52	913.62	1033.84	2.83	10.04