Strength Analysis - Finite Element Analysis for Satellite Structures - page 171

6.E-05

Point 1

5.E-05

Point 2

4.E-05

Point 3

Point 4

3.E-05

Point 5

2.E-05

1.E-05

0.E+00

1 3 5 7 9 11 13 15

Sorted modes number

Fig. 4.55 Cumulative fatigue damage of each mode versus sorted mode number for critical
points located on the base plate module [ 6 ]

2.E-04

2.E-04

Point 6

1.E-04 Point 7

1.E-04 Point 8

1.E-04

Point 9

8.E-05

Point 10

6.E-05

4.E-05

2.E-05

0.E+00

1 3 5 7 9 11 13 15

Sorted modes number

Fig. 4.56 Cumulative fatigue damage of each mode versus sorted mode number for critical
points located on the mounting plate module

4.13 Spectrum Analysis

In this section, a spectrum analysis is performed for Small Sat structure [ 4 ]. The
main purpose of this analysis is to provide investigate whether the satellite
structure can withstand all dynamic random vibration loads encountered during