Table 5: First three modal frequencies associated with different values of the elastic modulus.

Models E [kN/m2] f1 [Hz] f2 [Hz] f3 [Hz]
0 3375000 20.27 22.77 31.66
1 3206250 19.76 22.20 30.86
2 3037500 19.23 21.61 30.04
3 2868750 18.69 21.00 29.19
4 2700000 18.13 20.37 28.32
5 2531250 17.55 19.72 27.42
6 2446875 17.26 19.39 26.96