Stability Analyses on Pressure Structure of Submarine

The stabilities of some submarine structures are discussed. These structures include ring stiffened cylindrical shell,ring stiffened conical shell,conic cylindrical hull,pressure tank and so on. Through a great number of finite element calculations, this paper points out that some analytical methods can be used directly, while some others must be modified in advance,and some methods need farther discussions.Some concrete proposals are also given, so that the user can understand and apply those diversified analytical formulas of stability correctly. This paper has important theoretical and engineering values.