超高强度钛合金球壳设计计算方法适用性研究

Research on the applicability of calculation method for spherical shell design

为研究现行潜水器耐压结构设计计算方法对超高强度钛合金球壳结构的适用性,本文采用理论和数值方法,以目标结构参数(屈服强度ReH≥1250 MPa,内径Ri≥150 mm,工作深度H=11000 m)的钛合金球壳结构为研究对象,选取最小球壳厚度,计算结构应力和极限承载能力破坏压力,进而与设计计算方法控制标准进行对比。结果表明,在选取球壳厚度时,应在最小厚度计算结果的基础上小量增加球壳厚度,即可使现行设计规则球壳应力条款适用于新型超高强度钛合金球壳结构。

In order to study the applicability of the current design and calculation method of submersible pressure structures 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 R_(eH)≥1250 MPa,inner diameter R_(i)≥150 mm,working depth H-11000 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 calculation method control standard.The results show that when selecting the thickness of the spherical shell,it is necessary to increase 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.