Reliability assessment of structures of satellite and satellite carrier connected by clamp band

Document Type : Research Paper

Authors

Faculty of Materials & Manufacturing Processes, Malek Ashtar University of Technology, Tehran, Iran

Abstract

Uncertainties of the parameters cause the behavior of the systems to statistical distribution and change from what is expected. Therefore, in complex and sensitive systems, such as structures of satellite carrier and satellite connected to it, it is necessary to investigate the effect of uncertainty on dynamic response. In this paper, a novel finite element model of structures of satellite carrier and satellite is simulated to take parameters uncertainties of clamp band joint into account. This model is based on a method that calculates the distribution of axial and flexural stiffness equivalent of the clamp band joint considering all of the uncertainty. Then the vibrational behavior of the structure despite the uncertainties is investigated and a method for calculating the statistical distribution of the frequency response of the complete structure is presented. Finally, the frequency response distribution spectrum of the complete structure in both longitudinal and transverse (bending) directions is calculated. The results show that the standard deviation of the distribution in the frequency range close to the normal bending frequency due to the connection of clamp band joint has the highest value, which shows the effect of local stiffness of this connection on the dynamic response of the structure in the transverse direction. Also, the standard deviation of the distribution and consequently the effect of clamp band stiffness on the dynamic response of the structure in the longitudinal direction is small and negligible.

Keywords

References

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Aerospace Knowledge and Technology Journal
Volume 11, Issue 2 - Serial Number 2
October 2022
Pages 183-196

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