Analytical and Experimental Vibration of Sandwich Beams Having Various Boundary Conditions

Table 4

The natural frequencies (Hz) for cantilever beam with two different thicknesses.

Modes	= 15 mm		= 25 mm
	GDQ method	Experiment	GDQ method	Experiment
1	118.00	111.19	143.92	143.02
2	381.00	364.60	452.27	475.21
3	719.84	680.80	821.86	824.33
4	1141.94	1063.50	1261.56	1323.81
5	1675.51	1652.07	1800.17	1772.60