three-element mesh size criterion and its application to random vibration analysis of electronic equipment of satellite
- Paper number
IAC-08.C2.1.9
- Author
Prof. Yueyu Wang, China Academy of Space Technology (CAST), China
- Year
2008
- Abstract
The electronic equipment of satellite discussed in this paper is a class of typical closed box segment combination structure. It is difficult to perform the accurate high frequency random vibration analysis to this class of complicated structures by finite element method. In order to solve this problem, based on the wave structural propagation theory, a new finite element mesh size criterion called three-element mesh size criterion (TMSC) is proposed. Using TMSC, the random vibration analysis finite element models, which satisfy the requirement of engineering analytical precision, can be obtained rapidly and simply. Furthermore, TMSC can give a reasonable explanation to the mutational phenomenon of structural mode number, which occurs in the implementation of mode number mesh size criterion (MNMSC). In this paper, some practical finite element modeling techniques of this class of electronic equipments of satellites are also described. The comparison between the random vibration ground test data of the electronic equipments of a certain satellite and the NASTRAN numerical results of random vibration by using TMSC, shows that this analysis approach is feasible and effective and can acquire the random vibration analytical results, which satisfy the requirement of engineering calculation precision, rapidly and simply.
- Abstract document
- Manuscript document
(absent)