THE RELIABILITY ANALYSIS OF STIFFENED CYLINDERS USING DETERMINISTIC AND STOCHASTIC METHODS

Strength formulations used in different offshore codes for ring- stiffened cylinders are reviewed, particularly for conditions where the cylinders are subjected to axial compression, external pressure and bending moment. The effect of initial geometric distortions and plasticity are handled differently in different codes, which has led to major variations between them. Methods for combining load effects are also found to vary. A ring stiffened cylinder is subjected to axial load, external pressure and wave loading, the latter being derived using both deterministic (time domain) and stochastic (frequency domain) approaches. Both use Morison's equation to determine fluid loading. An advanced level 2 reliability analysis procedure is then used in conjunction with the Det norske Veritas strength formulations to examine the same range of ring-stiffened cylindrical columns as analyzed by the time and frequency domain procedures. Safety indices are calculated using both procedures for various ranges of uncertainties in Morison's coefficients and are found to vary significantly.

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  • Supplemental Notes:
    • Transactions paper
  • Authors:
    • Das, P K
  • Publication Date: 1987

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  • Accession Number: 00656771
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM