The Influence of the Mesh Element Size …
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2
3
4
5
Frequency [Hz]
Element size [mm]
First mode in OXY plane
First mode in OXZ plane
Fig. 5 Frequency variation of the first vibration mode in the two planes as a function of the size
mesh
deviation between the two natural frequencies is 0.14%. Even if between the two
situations, the deviations are in the second case 10 times higher than in the first case,
in absolute values they are insignificant.
Now, if the natural frequencies corresponding to the fourth vibration mode are
compared, for the largest number of nodes, i.e., with finite elements of 2 mm, it is
found that between the frequencies of the movements in the two planes is a deviation
of 0.019%. For the fourth natural mode way of vibration, it can be seen that between
frequencies obtained for the greatest number of nodes and frequencies obtained for
the smallest number of nodes is a percentage deviation of 1.5% (Fig. 6).
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2
3
4
5
Frequency [Hz]
Element size [mm]
Fourth mode in OXY plane
Fourth mode in OXZ plane
Fig. 6 Frequency variation of the fourth vibration mode in the two planes as a function of the size
mesh