Random Vibration Analysis and Structural Modification of Satellite-borne Equipment

In order to study the random vibration responses of satellite-borne equipment, the finite element model of satellite-borne equipment was established and its random vibration analysis was performed by ANSYS. The results showed that the stress of key part was too large to meet the strength requirement. The structural design was modified based on the stress analysis results. At the cost of adding 1.03% weight, we find the fundamental frequency of the modified model is increased by 14% and the maximum 1 sigma von Mises stress is decreased by 30%, which verify the correctness of the modification method. This analysis and modification method also can be applied to modify other satellite-borne equipments to shorten the development period and reduce the design cost.