Free Vibration of Rectangular Plates with Porosity Distributions under Complex Boundary Constraints

Table 5

Nondimensional frequency parameter Ω for porous rectangular plates subjected to different classical edge conditions (e = 0.2, a/b = 0.5, and h/b = 0.2).

Type	Mode no.	Boundary conditions
		SCSC	SFSF	SSSS	CFCF	CSCS	CCCC
I	1	0.3768	0.3671	0.3768	0.5711	0.6033	0.6238
	2	0.4676	0.3769	0.4478	0.5885	0.7298	0.7756
	3	0.6867	0.4221	0.6470	0.6702	0.7536	0.9708
	4	0.7536	0.5815	0.7536	0.7195	0.9615	1.0097
	5	0.8942	0.6586	0.7536	0.8508	0.9674	1.1906
II	1	0.3768	0.3739	0.3768	0.5758	0.6085	0.6292
	2	0.4751	0.3769	0.4556	0.5935	0.7370	0.7823
	3	0.6951	0.4296	0.6566	0.6768	0.7536	0.9709
	4	0.7537	0.5908	0.7536	0.7196	0.9675	1.0178
	5	0.8943	0.6587	0.7537	0.8600	0.9711	1.1977
III	1	0.3763	0.3656	0.3763	0.5695	0.6016	0.6220
	2	0.4659	0.3763	0.4460	0.5869	0.7277	0.7735
	3	0.6845	0.4204	0.6447	0.6684	0.7525	0.9695
	4	0.7525	0.5794	0.7525	0.7186	0.9587	1.0071
	5	0.8930	0.6577	0.7525	0.8483	0.9661	1.1882