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Theoretical calculation and experimental verification for opening strength of deep manned spherical shell
Author(s): 
Pages: 1289-1298
Year: Issue:  10
Journal: Journal of Ship Mechanics

Keyword:  deep submersiblemanned spherical shellopening strengthexperimental verification;
Abstract: According to the axial symmetry of external pressure spherical shell open areas and strength char-acteristics of Equivalent Area Reinforcement, this paper makes geometric transformations to cone-platformed open reinforcements of deep manned thick spherical shell and solves a complicated three-order nonhomo-geneous equation, perfecting and expanding theoretical calculation methods of spherical shell opening with wall and thick plate combination reinforcements. Based on the theoretical calculation, FEM and experimen-tal verification of stress concentration factor in two 4 500 meters deep manned spherical shells, the reliabili-ty and applicability of this method is proved. This paper can provide basis for revising deep-sea manned spherical shell strength specification.
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