Satellite Structural Design - Finite Element Analysis for Satellite Structures - page 63

Fig. 3.9 F.E. model
of mounting plate

Fig. 3.10 F.E. model of base

plate

stiffeners, rectangular 2 9 25 mm c.s. for the boundary stiffeners, and rectangular
2 9 25 and 2 9 15 mm c.s. for internal stiffeners. The skin is 1.5 mm thick.
Figures 3.20 and 3.21 show the stress and deformation distributions in the basis
plate. As shown in the figures, the maximum stress and deformation in the basis
plate are not acceptable, so two diagonal struts are added to connect the basis plate
with the basis unit walls. The selected cross-section of the diagonal struts is a
16 9 16 9 18 9 2 9 2 9 3 channel c.s.
For the basis unit walls, the final F.E.M. consists of the following beam cross-
sections: channel 30 9 30 9 22 9 4 9 4 9 4 c.s. for the main eight stringers
intended for structure fastening and load carrying path, L 22 9 22 9 6 9 6 c.s. for
the four wall connection corners, and rectangular 1.5 9 16.5 mm c.s. for internal
and boundary stiffeners. The skin is 1.5 mm thick. The final F.E.M. for the upper
frame has no skin and consists of the following beam cross-sections: channel