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

Table 2

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

t/a	Method	Mode sequence number
		1	2	3	4	5	6
0.005	FEM-DSG	4.8067	8.5038	9.2631	12.3353	16.6573	17.9400
		4.5190	7.3529	7.5123	9.7058	11.2071	11.2798
		4.4545	7.0943	7.1344	9.0748	10.2148	10.2180
		4.4440	7.0499	7.0680	8.9591	10.0481	10.0521
	NS-FEM	3.8523	4.6180	4.6696	5.4803	5.5805	5.7068
		4.2873	4.7464	4.9528	5.4243	5.9702	6.2474
		4.3931	4.8182	4.8238	5.2862	5.8463	6.1054
		4.4156	4.7659	4.7660	5.4864	6.2891	6.2921
	NS-DSG	4.1952	6.2489	6.3781	7.4032	7.5154	8.2944
		4.3191	6.7445	6.7573	8.4370	9.3131	9.3758
		4.3853	6.9234	6.9248	8.7009	9.7366	9.7462
		4.4053	6.9658	6.9667	8.7753	9.8308	9.8348
	GS-DSG	4.2893	6.7888	6.9313	8.3816	9.5817	9.6035
		4.3637	6.8888	6.8966	8.6707	9.6991	9.7403
		4.4101	6.9687	6.9729	8.7846	9.8260	9.8393
		4.4228	6.9918	6.9945	8.8249	9.8738	9.8807
	Reference [72]	4.443	7.025	7.025	8.886	9.935	9.935
0.1	FEM-DSG	4.6700	7.9713	8.5811	10.3261	10.6011	10.6017
		4.3964	6.9971	7.1328	8.9615	9.7532	10.1849
		4.3200	6.7565	6.7874	8.4201	9.4119	9.4185
		4.3012	6.7086	6.7216	8.3093	9.2733	9.2794
	NS-FEM	3.7366	4.4102	4.4397	5.1403	5.2270	5.3701
		4.1438	4.4389	4.5862	5.0152	5.4576	5.6616
		4.2327	4.4534	4.4553	4.8923	5.3434	5.5359
		4.2534	4.4057	4.4058	5.0280	5.6971	5.6991
	NS-DSG	4.1026	5.9418	6.0366	6.7521	6.7843	7.1540
		4.2175	6.4611	6.4728	7.3821	7.6795	7.7982
		4.2675	6.6158	6.6158	7.6205	7.8446	7.8451
		4.2759	6.6439	6.6458	7.7018	7.8603	7.8604
	GS-DSG	4.1863	6.4643	6.5416	7.7482	8.5051	8.6428
		4.2546	6.5859	6.5877	8.0866	8.9413	8.9637
		4.2816	6.6463	6.6487	8.1817	9.0967	9.0979
		4.2830	6.6576	6.6593	8.2002	9.1314	9.1365
	Reference [72]	4.37	6.74	6.74	8.35	9.22	9.22