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Estimation of Elastic Buckling Strength of a Non-Spherical Tank in the Partially Filled Condition

[+] Author Affiliations
Atsushi Sano, Naoya Matsubara, Naruyoshi Izumi

Kawasaki Heavy Industries, Ltd., Akashi, Japan

Masahiko Fujikubo

Osaka University, Suita, Japan

Paper No. OMAE2017-61397, pp. V03BT02A042; 9 pages
doi:10.1115/OMAE2017-61397
From:
  • ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 3B: Structures, Safety and Reliability
  • Trondheim, Norway, June 25–30, 2017
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5766-3
  • Copyright © 2017 by ASME

abstract

A method of estimating elastic buckling strength of a non-spherical tank intended for the use in LNG carriers is presented. Partially filled condition that causes combined meridional tension and circumferential compression is considered. Analytical expression of pre-buckling stress distributions is derived based on membrane shell theory. These stresses are applied to the elastic buckling strength analysis employing Hutchinson’s solution for a toroidal shell segment under similar stress condition. The buckling strength of a spherical shell is highly sensitive to initial shape imperfections, but these are not considered as a most fundamental case. The predicted stress distributions and elastic buckling strength are compared with those calculated by the 3D shell finite element analysis.

Copyright © 2017 by ASME
Topics: Buckling

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