The effect of frame torsion on the local stability of a ring-stiffened cylindrical shell |
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Authors: | Wang Xiao-tian Qin Zai-bai Gao Ling-zhi Liang Xue-xian |
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Institution: | (1) School of Shipbuilding Engineering, Harbin Enginering University, 150001 Harbin, China |
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Abstract: | In the previous research, the effect of the frame torsion on the local stability of a ring-stiffened cylindrical shell, which
was proved to be significant, was usually omitted. In this paper this effect under the action of static water pressure is
studied. The frame torsional strain energy is calculated by consulting the method used in the research on the stability of
a stiffened rectangular plate. With this item of energy being introduced into the total potential energy of the structure,
a new stability formula for calculating the critical pressure for the local buckling of the ring-stiffened cylindrical shell
is obtained by Ritz method. This new formula can be regarded as a revision of the famous Mises’ formula. The calculation of
the example shows that the critical pressure given by this formula is closer to the model test data than that given by Mises’
formula. |
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Keywords: | ring-stiffened cylindrical shell frame shell stability |
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