EFFECTS OF SECONDARY STRUCTURE ON THE STRESS AND STABILITY OF SUBMARINE PRESSURE HULLS

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Authors
  1. Pegg, N.G.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The report presents an investigation into the localized effects of secondary structure such as decks, tanks and cutouts, and other deviations from axisymmetry on the global failure load estimation of axisymmetric submarine pressure hulls. Three dimensional finite element analysis predictions of stress, elastic bifurcation buckling, and nonlinear collapse loads of a representative complete section of a conventional submarine are compared to those of axisymmetric analysis methods applied to the pressure hull alone. Four different methods of analyzing the basic failure loads of the fully developed structural models were found to differ significantly from those obtained assuming complete axisymmetry. The inclusion of decks and tanks increased the failure loads, whereas cutouts and dents in the pressure hull lowered the failure loads. In addition to analytical results, experimental strain measurements made on an Oberon class pressure hull are compared to finite element predictions.
Report Number
DREA-87-102 —
Date of publication
15 Nov 1987
Number of Pages
51
DSTKIM No
88-00520
CANDIS No
53762
Format(s):
Microfiche filmed at DSIS;Originator's fiche received by DSIS;Hardcopy;Document Image stored on Optical Disk

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