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使用文［１］提出的三维结构塑性极限分析的一般计算方法，我们对含凹坑缺陷的圆柱壳进行了数值极限分析．对凹坑和筒体各种组合的几何参数，本文给出了筒壳极限压力的上限．计算结果与现有的理论、实验和数值解进行了比较．本文调查和评估了各种形状和尺寸的凹坑对筒壳极限承载能力的影响规律，研究了对应于不同凹坑尺寸的筒壳两种典型的破坏模式．根据以上数值结果，本文采用几何参数Ｇ来反映凹坑各参数对筒壳极限压力的综合影响，并给出了估计带凹坑筒体极限压力的拟合公式．本文结果对含凹坑缺陷压力容器的安全评估具有重要参考价值
Using the general calculation method for the plastic limit analysis of the three-dimensional structure proposed by [1], the numerical limit analysis of cylindrical shells with pit defects is performed. For the geometrical parameters of various combinations of pits and cylinders, the upper limit of the ultimate pressure of the cylinder shell is given in this paper. The calculated results are compared with the existing theoretical, experimental and numerical solutions. This paper investigates and evaluates the effect of pits of various shapes and sizes on the ultimate load-carrying capacity of cylinder shells, and studies two typical failure modes of cylinder shells corresponding to different pit sizes. According to the above numerical results, the geometrical parameter G is used to reflect the comprehensive effect of the parameters of the pit on the ultimate pressure of the cylinder shell, and the fitting formula for estimating the ultimate pressure of the concave cylinder is given. The results of this paper have important reference value for the safety assessment of pressure vessels containing pit defects