Table 6.

Comparison between EM and NM frequencies at step 2 with Code Aster©.

Mode	${\mathbf{f}}_{\mathbf{E}\mathbf{M}} \left[\mathbf{Hz}\right]$	Step 2 ${\mathbf{f}}_{\mathbf{N}\mathbf{M}} \left[\mathbf{Hz}\right]$	$\mathbf{\Delta }{\mathbf{f}}_2 (\%)$
1	1.654	1.529	6.97
2	1.800	2.000	1.95
3	4.236	3.715	23.36
4	4.955	5.095	0.76
5	9.767	9.686	13.05