期刊
MARINE STRUCTURES
卷 23, 期 4, 页码 444-461出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.marstruc.2010.11.001
关键词
Spherical pressure hull; Manned submersible; Ultimate strength; Design rules
From a comparative study it is concluded that current design rules for the spherical pressure hull of manned submersible need to be updated and unified. In this paper, a series of spherical pressure hulls are calculated by nonlinear FEM. Based on these numerical results, the influence of critical arch length and the relationship of ultimate strength with t/R and structural imperfection are studied. Finally, empirical formulae for the ultimate strength of the titanium alloy spherical pressure hull of deep manned submersible based on numerical computations are given. The formulae can be used as the core equations to update current design rules. (C) 2010 Elsevier Ltd. All rights reserved.
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