Abstract: FEA to prestressed connection structure between composite material shell and front skirt. Through the establishment of physical model to composite material shell under axial compression,then mesh for FEA calculation model, the paper compared the prestressing force intensity ratios of three different interference fit connection structures, and came to a conclusion that to exert a interference fit prestressing force only upon the root of the connection structure between concial composite material shell and front skirt,it has the minimal prestressing force intensity ratio,which connection structure is the most reliable.

Key words: under axial compression, composite material shell, connection structure, prestressing force, FEA(finite element analysis)