为研究潜艇耐压艇体环肋圆柱壳结构肋骨损伤后的剩余强度，以肋骨侧倾变形为损伤形式，利用有限元分析软件Ansys，对计算模型在静水外压作用下的应力分布、稳定性和极限承载能力进行计算，分析肋骨侧倾变形对环肋圆柱壳结构力学特性的影响规律。结果表明：肋骨出现侧倾损伤后，损伤肋骨附近跨中壳板中面环向应力是控制结构承载能力的应力指标；随着损伤变形角度的增大，舱段总体稳定性和极限强度均显著降低。利用本文的计算结果，可反推潜艇的剩余极限下潜深度。
In order to research the residual strength of submarine pressure hull after ribs inclination damage.This paper take inclination deformation of the ribs as the form of damage.In this study, finite element analysis software Ansys is used to calculate the stress distribution, stability and ultimate bearing capacity of the model under hydrostatic external pressure. The influence of rib inclination on the mechanical properties of ring-stiffened cylindrical shell is analyzed. The result shows that the circumferential stress of middle surface near the ribs damaged is the stress index controlling the bearing capacity of the structure after the ribs are tilting damaged.With the increasing of the deformation angle, the overall stability and ultimate strength of the cabin decreases significantly.By using the calculation results in this paper, the residual limit depth of submarine can be deduced.
2022,44(10): 10-15 收稿日期：2021-03-02
DOI：10.3404/j.issn.1672-7649.2022.10.003
分类号：U663.6
作者简介：刘旭(1993-)，男，硕士研究生，研究方向为结构强度与振动
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