Progressive collapse behavior of double hull tanker under longitudinal bending
- Hiroshima Univ. (Japan)
- Hitachi Zosen Corp., Osaka (Japan)
To assess the longitudinal strength of double hull tankers, a progressive collapse analysis was carried out on the cross section of an existing double hull VLCC applying a simple method of analysis proposed by one of the authors. The results of analysis indicate that: (1) under the sagging condition, the ultimate longitudinal strength is attained soon after the deck collapses by buckling; (2) under the hogging condition, the initial collapse takes place at the deck by yielding. This is followed by the buckling at the bottom plating and then at the inner one, and the ultimate longitudinal strength is attained. The influence of corrosion damage on the ultimate longitudinal strength was also examined assuming a thickness reduction and a failure of fillet weld. Finally, some considerations were made from a design aspect, which includes a comparison of collapse behavior between double hull and single hull tankers of the same size and a safety assessment of ship`s hulls by comparing the calculated ultimate strength with the design bending moment.
- OSTI ID:
- 433667
- Report Number(s):
- CONF-940409--; ISBN 1-880653-10-9
- Country of Publication:
- United States
- Language:
- English
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