纵环加筋圆柱形耐压壳作为一种新型的耐压壳结构，之前对它的屈曲研究大多是基于线弹性理论的屈曲模态和极限承载力计算。由于没有考虑几何和材料非线性，计算值同实验值相差较大，要结合实验对计算结果进行修正。本文将非线性屈曲问题转变为线性静力学问题求解，对纵环加筋圆柱形耐压壳进行了非线性屈曲计算。具体数值计算工作使用专业计算软件完成。非线性屈曲计算结果在屈曲模态上与实验吻合，说明采用的计算方法是合理的。本文对具有不同程度初始缺陷的耐压壳进行了数值计算，证实初始缺陷越大承载能力越低。文中的计算方法和结论可为深潜器耐压壳的设计提供参考。
As a new type of pressure shell structure, the buckling research of longitudinal and ring stiffened cylindrical pressure hull is mostly about the buckling mode and ultimate bearing capacity based on linear elastic theory. Because the geometric and material nonlinearities are not considered, the calculated values are quite different from the experimental values, so the calculated results should be corrected according with the experimental results. In this paper, the nonlinear buckling problem is transformed into the linear statics problem. The nonlinear buckling of a cylindrical pressure hull with longitudinal and ring stiffeners is calculated. The numerical calculation is completed by using the professional calculation software. The results of nonlinear buckling calculation are the same as the experimental results on buckling modes, which demonstrates that the calculation method adopted is reasonable. In this paper, the numerical calculation of pressure hull with different initial imperfections is carried out. It is proved that the larger the initial imperfections are, the lower the bearing capacity is. The calculation methods and conclusions are able to provide reference for the submarine pressure hull design.
2019,41(9): 22-25,109 收稿日期：2018-09-26
DOI：10.3404/j.issn.1672-7649.2019.09.004
分类号：U661.43
作者简介：彭懿(1982-),男,硕士,工程师,从事深潜器研发工作
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