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

Table 9

New in-plane frequency parameters Ω for SS2-E-SS2-E orthotropic rectangular plates.

B.C	Ex/Ey	Mode sequence
		1	2	3	4	5	6	7	8	9	10
SS2-E1-SS2-E1	2	0.0215	0.8382	1.1789	1.2395	1.8157	1.9446	1.9534	2.0001	2.3572	2.4507
	10	0.0219	0.9355	1.1789	1.4389	1.9320	2.1910	2.3572	2.4461	2.9290	2.9567
	20	0.0219	0.9556	1.1789	1.4762	1.9550	2.2366	2.3572	2.4946	2.9564	3.0095
	40	0.0219	0.9695	1.1789	1.4999	1.9710	2.2670	2.3572	2.5209	2.9744	3.0416
SS2-E2-SS2-E2	2	0.2118	0.8710	1.2164	1.2744	1.8376	1.9681	1.9735	2.0154	2.3764	2.4761
	10	0.2156	0.9628	1.2177	1.4728	1.9474	2.2154	2.3771	2.4647	2.9407	2.9725
	20	0.2161	0.9817	1.2179	1.5090	1.9692	2.2597	2.3772	2.5134	2.9665	3.0253
	40	0.2163	0.9946	1.2180	1.5319	1.9842	2.2891	2.3773	2.5397	2.9835	3.0573
SS2-E3-SS2-E3	2	1.0513	1.3654	1.9086	2.1089	2.1803	2.3734	2.3995	2.6333	3.0424	3.1156
	10	1.0554	1.4336	2.1165	2.2456	2.2847	2.8616	3.1677	3.1876	3.2332	3.6277
	20	1.0559	1.4433	2.1174	2.2532	2.3130	2.8861	3.1737	3.1888	3.2927	3.6487
	40	1.0561	1.4485	2.1178	2.2571	2.3270	2.8987	3.1768	3.1894	3.3178	3.6596