Free In-Plane Vibrations of Orthotropic Rectangular Plates by Using an Accurate Solution

Table 8

New in-plane frequency parameters Ω for SS1-E-SS1-E orthotropic rectangular plates.

B.C	Ex/Ey	Mode sequence
		1	2	3	4	5	6	7	8	9	10
SS1-E1-SS1-E1	2	0.0215	0.8339	0.8382	1.2395	1.6669	1.8157	1.9446	1.9534	2.0001	2.4507
	10	0.0219	0.8339	0.9355	1.4389	1.6669	1.9320	2.1911	2.4461	2.5002	2.9290
	20	0.0219	0.8339	0.9556	1.4762	1.6669	1.9550	2.2366	2.4946	2.5002	2.9564
	40	0.0219	0.8339	0.9695	1.4999	1.6669	1.9710	2.2670	2.5002	2.5209	2.9744
SS1-E2-SS1-E2	2	0.2090	0.8710	0.8852	1.2744	1.6938	1.8376	1.9681	1.9735	2.0155	2.4761
	10	0.2127	0.8870	0.9628	1.4728	1.6948	1.9474	2.2155	2.4648	2.5190	2.9407
	20	0.2131	0.8873	0.9817	1.5090	1.6950	1.9692	2.2597	2.5134	2.5191	2.9665
	40	0.2133	0.8874	0.9946	1.5319	1.6950	1.9842	2.2891	2.5191	2.5397	2.9835
SS1-E3-SS1-E3	2	0.7855	1.3654	1.5717	1.9086	2.1803	2.3593	2.3735	2.3995	2.6333	3.0425
	10	0.7871	1.4336	1.5749	2.2456	2.2847	2.3639	2.8616	3.1547	3.1677	3.2332
	20	0.7873	1.4433	1.5753	2.2532	2.3130	2.3645	2.8861	3.1554	3.1737	3.2927
	40	0.7874	1.4485	1.5755	2.2571	2.3270	2.3648	2.8987	3.1558	3.1768	3.3178