随机腐蚀对立式储罐抗震性能的影响研究
Study on the Influence of Random Corrosion on the Seismic Performance of Vertical Storage Tanks
为了减少地震对于储罐失效风险的影响,本研究以1万方大型立式钢储罐为对象,提出蒙特卡洛模拟与ADINA有限元耦合方法,探究随机腐蚀下储罐抗震性能演化规律。建立储罐-储液流固耦合有限元模型,生成随机腐蚀形貌,开展应力及加速度时程分析。结果表明腐蚀坑造成局部刚度弱化,诱发应力集中与局部加速度升高,加剧储罐动力性能劣化与共振风险。
To mitigate the impact of earthquakes on the risk of tank failure, this study focuses on a 10,000 cubic meter large vertical steel tank and proposes a coupled Monte Carlo simulation and ADINA finite element method to investigate the evolution of the tank's seismic performance under random corrosion. A fluid-structure coupled finite element model of the tank-liquid storage system is established to generate random corrosion morphologies and perform stress and acceleration time-history analysis. The results indicate that corrosion pits weaken local stiffness, induce stress concentration and local acceleration increase, and exacerbate the deterioration of the tank's dynamic performance and resonance risk.
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大连民族大学创新创业训练计划(202512026151)
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