Development of a New Cracked Mindlin Plate Element

Table 7

Example 3: the ratios of the first four natural frequencies (Δ𝜔_𝑖=𝜔^𝑐𝑖/𝜔_𝑖) of a cantilever plate with different thicknesses.

Mode	𝑡/𝐿=0.001	𝑡/𝐿=0.01	𝑡/𝐿=0.05	𝑡/𝐿=0.1
1st	1.0000	0.9940	0.9840	0.9837
2nd	1.0000	0.9992	0.9943	0.9941
3rd	0.9999	0.9910	0.9735	0.9731
4th	0.9999	0.9923	0.9811	0.9803