周囲液体からの静液圧と一様な軸圧縮荷重を受ける円筒殻の座屈 -円筒状海洋構造物の安定性に関する研究(第3報)- [in Japanese] Buckling of Circular Cylindrical Shells Surrounded with Liquid under Axial Compression -Studies on the stability of cylindrical offshore structures(3rd Report)- [in Japanese]
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In order to clarify systematically the stability of cylindrical offshore structures, the buckling problem of circular cylindrical shells surrounded with liquid under axial compression is analyzed. A theoretical analysis is performed by means of the Galerkin method on the basis of the Donnell-type equations for shells, taking the effect of the axisymmetric deformation due to the static liquid pressure into consideration. Calculations are carried out for both simply supported and clamped shells and the critical compressive load <I>k<SUB>c</SUB></I> are determined for various values of the shell geometric parameter <I>Z</I>, liquid pressure parameter <I>p<SUB>x</SUB></I> and liquid depth ratio <I>l</I><SUB>0</SUB>.<BR>The main results obtained are summarized as follows:<BR>(1) The critical compressive load ratio <I>k<SUB>c</SUB></I> decreases monotonously with an increase in the value of <I>l</I><SUB>0</SUB> and/or <I>p<SUB>x</SUB></I>. With an increase in <I>l</I><SUB>0</SUB>, the buckling wave number ratio β increases for small value of <I>Z</I> and decreases to less than unity for large value of <I>Z</I>.<BR>(4) The effects of the surrounding liquid and the axial compression on the prebuckling deformation and the change of buckling mode for the rapid change of buckling load and buckling wave number are clarified by means of the contour map representation.
- Journal of MMIJ
Journal of MMIJ 113(1), p.29-34, 1997-01
The Mining and Materials Processing Institute of Japan