期刊
OCEAN ENGINEERING
卷 108, 期 -, 页码 325-335出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2015.08.005
关键词
Toroidal shell; Steel model; Experiment; Nonlinear FEM; Failure mode
资金
- Program of National Natural Science Foundation of China
- China 'Theoretical and Experimental Research about Structure of Pressure Toroidal Shell in Underwater Engineering' [51109190]
- State Key Program of National Natural Science Foundation of China 'Structural Reliability Analysis on the Spherical Hull of Deepsea Manned Submersibles' [51439004]
- Scientific Innovation Program Project 'Key Technology Research and experimental validation of deep manned submersible' by the Shanghai Committee of Science and Technology [14DZ1205500, 14DZ2250900]
The ring-stiffened toroidal shell is entirely different from the traditional ring-stiffened cylindrical and spherical shells. It has special structurally beneficial characteristics for underwater engineering. A whole welding steel toroidal model with the ring-stiffened ribs has been manufactured, tested until collapse in pressure chamber and analyzed by nonlinear finite element analyses (FEAs). Then the essential cause and collapse mode of this tested ring-stiffened toroidal model have been studied comprehensively by nonlinear FE method. The experimental and numerical results both reveal that the initial geometric imperfection would mainly determine the model's final failure mode, critical pressure and collapse deformation. Further parametric study is made to study the budding property of ring-stiffened toroidal shell, including failure mode and critical pressure loading by varying the structural parameters. This investigation will lay a good foundation for deriving a theoretical solution for the budding of ring-stiffened toroidal shell in the near future. (C) 2015 Elsevier Ltd. All rights reserved.
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