Research on the applicability of calculation method for spherical shell design
In order to study the applicability of the current design and calculation method of submersible pressure struc-tures for ultra-high strength titanium alloy shell structures,theoretical and numerical methods were adopted in this paper.The titanium alloy shell structures with target structural parameters(yield strength ReH≥1 250 MPa,inner diameter Ri 150 mm,working depth H=11 000 m)were selected as the research object,and the minimum shell thickness was selected.The structural stress and ultimate bearing capacity failure pressure were calculated,and then compared with the design calcu-lation method control standard.The results show that when selecting the thickness of the spherical shell,it is necessary to in-crease the thickness of the spherical shell by a small amount on the basis of the calculation results of the minimum thickness,so that the current design rules of the spherical shell stress clause can be applied to the new ultra-high strength titanium alloy spherical shell structure.
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