Buckling of Multiple Intersecting Spherical Shells Under Uniform External Pressure
Jian Zhang , Shengqiu Li , Weicheng Cui , Kai Xiang , Fang Wang , Wenxian Tang
Journal of Marine Science and Application ›› 2020, Vol. 19 ›› Issue (4) : 634 -641.
Buckling of Multiple Intersecting Spherical Shells Under Uniform External Pressure
This study explored the buckling of multiple intersecting spherical shells. A three-segment spherical shell was designed using the theory of deformation coordination; the design was compared with that of a volume-equivalent cylindrical shell and ring-ribbed cylindrical shell. The numerical results indicated that the buckling capacity of the three-segment spherical shell was superior to those of the other two cylindrical shells. To validate our numerical approach, three laboratory-scale shell models were fabricated. Each model was accurately measured and slowly tested in a pressure chamber; thus, the tested shells were studied numerically. The experimental collapse modes agreed well with numerical results, and the collapse load of the three-segment pressure shell was considerably higher than that of the two cylindrical shells.
Multi-segment spherical shell / Cylindrical shell / External pressure / Buckling
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