Master Thesis - OUFTI-1

3.9.3 Dynamic behavior
Finally, it is also important to verify that the dynamic behavior of the support could
not cause trouble for the satellite.
The modeling of the support is the same as the one described in the previous section.
The 5 rst natural frequencies obtained are available in Table 3.7.
Frequency (Hz)
1 2869.53
2 3219.66
3 5978.78
4 6022.2
5 6192.42
Table 3.7: First natural frequencies of the battery support
The two most signicant modes are represented in Figure 3.25 to illustrate the general
dynamic behavior of the assembly.
From these results, it can be deduced that the dynamic behavior of the support will
not aect the global behavior of the satellite in a critical way. It can also be noted that the
second vibration mode of the support is a bending mode of the legs. This fact consolidates
our idea that the principal stress concentration will be situated at this particular place,
and validates our choice to increase the thickness of these legs.
To conclude, these results demonstrate that our design is valid with regard to the
dynamic behavior.
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