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

Table 4

Natural frequencies of the pinned-free beam with respect to the weak axis (Y).

Mode	Natural frequency (Hz)			Error (%)
	Experimental	Predicted (Equation (9))	Numerical	Experimental − predicted	Experimental − numerical
1	5.72	0	0	—	—
2	52.73	50.42	50.84	4.39	3.72
3	161.88	163.38	164.77	0.92	1.75
4	327.26	335.64	343.785	2.56	4.81
5	541.98	558.61	587.94	3.07	7.82
6	792.48	829.24	897.333	4.64	11.68