A Gradient Stable Node-Based Smoothed Discrete Shear Gap Method for Analysis of Reissner–Mindlin Plates

Table 4

A nondimensional frequency parameter of a CCCC plate (a/b = 1).

t/a	Method	Mode sequence number
		1	2	3	4	5	6
0.005	FEM-DSG	8.6743	14.6071	18.4781	22.1215	28.3891	29.1794
		6.3839	9.4693	9.7732	12.4103	13.8892	14.2365
		6.0740	8.7422	8.8097	10.8089	11.9473	11.9823
		6.0284	8.6355	8.6554	10.5653	11.6629	11.6897
	NS-FEM	4.8662	27.2994	27.4030	30.5485	31.2468	33.7182
		5.5113	5.6369	5.6908	6.1573	6.7345	6.8578
		5.1463	5.1567	5.6597	5.8989	6.2153	6.5428
		4.9637	4.9639	5.7411	5.9520	6.5102	6.5153
	NS-DSG	6.2399	7.7833	14.5143	16.8787	18.5504	19.4584
		8.8488	8.0945	8.2608	9.9613	10.4157	10.8271
		5.9356	8.3981	8.4178	10.1743	11.1144	11.1576
		5.9660	8.4810	8.4879	10.2770	11.2890	11.3201
	GS-DSG	7.1391	10.4788	14.7362	17.0639	18.8060	19.5371
		5.9902	8.4671	8.6174	10.6220	11.2868	11.6486
		5.9694	8.4856	8.5019	10.3112	11.3058	11.3398
		5.9807	8.5191	8.5249	10.3363	11.3724	11.4008
	Reference [73]	5.999	8.568	8.568	10.407	11.472	11.498
0.1	FEM-DSG	7.0255	10.2284	11.3539	11.3850	11.8340	12.8015
		5.9576	8.4011	8.6489	10.3774	11.2084	11.3691
		5.7609	7.9968	8.0525	9.5838	10.4278	10.4803
		5.7274	7.9271	7.9514	9.4369	10.2517	10.2995
	NS-FEM	4.6154	6.3432	6.7867	6.8568	7.0858	7.6405
		4.8119	4.9749	5.3796	5.4743	5.9144	5.9380
		4.5501	4.5572	5.1111	5.5108	5.6206	5.7290
		4.4494	4.4494	5.2545	5.6658	5.7524	5.7533
	NS-DSG	5.7131	7.0630	7.8426	8.2222	8.3801	8.4698
		5.5540	7.4852	7.5508	7.7638	7.9153	8.2500
		5.6544	7.7558	7.7675	7.9294	7.9310	8.0354
		5.6797	7.8190	7.8242	7.9132	7.9133	7.9705
	GS-DSG	6.1305	8.3987	8.9986	10.2059	10.3095	10.3511
		5.6505	7.7377	7.7683	9.2385	9.8542	9.8966
		5.6787	7.8130	7.8225	9.2477	9.9985	10.0421
		5.6902	7.8433	7.8479	9.2831	10.0575	10.1036
	Reference [73]	5.71	7.88	7.88	9.33	10.13	10.18