Postbuckling and Free Nonlinear Vibration of Microbeams Based on Nonlinear Elastic Foundation

Table 3

Comparison of frequency ratios of macrobeams.

α	P-P macrobeam			C-C macrobeam
	Present	Fallah et al. [23]	Azrar et al. [24]	Present	Fallah et al.; [23]	Azrar et al. [24]
1	1.0863	1.0897	1.0891	1.0223	1.0552	1.0221
2	1.3115	1.3229	1.3177	1.0863	1.2056	1.0856
3	1.6186	1.6393	1.6256	1.1853	1.4214	1.1831
4	1.9698	1.9999	-	1.3115	1.6776	1.3064