Initiation and growth of pitting corrosion results from electro-chemical reactions closely related to environmental factors, causing great uncertainties in the pit depth, pit size, pit shape and pitting distribution. A cellular automaton (CA) approach was adopted to address the electro-chemical process of pitting corrosion in marine environments, yielding a geometric morphology of corrosion damage. The simulated corrosion pits in the CA-based model, treated as the cylinders, semi-ellipsoids, cones or cavities of hybrid shapes, were introduced into structural analysis models. The effect of pit shape on compressive behavior and ultimate strength of pitted plates was studied, which was linked with the stress interaction between pits. A modelling method based on stochastic simulation was proposed to generate random pitting damage based on limited statistical corrosion data, which could reflect all aspects of the random natures of actual pitting corrosion. Numerical results showed high consistencies with available tests of ultimate strength of pitted plates. The pit shape significantly affects the ultimate strength of pitted structures, likely causing a strength variation more than 20% in a naturally pitted hull plate. This is essentially due to the stress interaction between pits of diverse shapes affecting the onset and development of plasticity in pitted areas.

点蚀的发生和发展是与环境因素密切相关的电化学反应的结果，导致坑深、坑大小、坑形状和点蚀分布具有很大的不确定性。采用元胞自动机（CA）方法来解决海洋环境中点蚀的电化学过程，产生腐蚀损伤的几何形态。将基于 CA 的模型中模拟的腐蚀坑，作为混合形状的圆柱、半椭球、圆锥或空腔，引入结构分析模型中。研究了凹坑形状对凹坑板的压缩行为和极限强度的影响，这与凹坑之间的应力相互作用有关。提出了一种基于随机模拟的建模方法，基于有限的统计腐蚀数据生成随机点蚀损伤，可以反映实际点蚀随机性的方方面面。数值结果表明与现有的麻点板极限强度测试具有高度一致性。凹坑形状显着影响凹坑结构的极限强度，很可能导致自然凹坑船体板强度变化超过 20%。这主要是由于不同形状的凹坑之间的应力相互作用影响了凹坑区域塑性的发生和发展。凹坑形状显着影响凹坑结构的极限强度，很可能导致自然凹坑船体板强度变化超过 20%。这主要是由于不同形状的凹坑之间的应力相互作用影响了凹坑区域塑性的发生和发展。凹坑形状显着影响凹坑结构的极限强度，很可能导致自然凹坑船体板强度变化超过 20%。这主要是由于不同形状的凹坑之间的应力相互作用影响了凹坑区域塑性的发生和发展。