| Risk Based Optimal Inspection and Repair Planning for Ship Structures Subjected to Corrosion Deterioration |
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| 引用本文： | 李典庆 张圣坤 唐文勇. Risk Based Optimal Inspection and Repair Planning for Ship Structures Subjected to Corrosion Deterioration[J]. 中国海洋工程, 2004, 18(2): 185-196 |
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| 作者姓名： | 李典庆 张圣坤 唐文勇 |
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| 作者单位： | SchoolofNavalArchitectureandOceanEngineering,ShanghaiJiaoTongUniversity,Shanghai200030,China |
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| 基金项目： | ThispaperwassupportedbytheResearchFundfortheDoctoralResearchFoundationoftheMinistryofEducationofChina (GrantNo .2 0 0 0 0 2 4 80 2 ) |
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| 摘 要： | A framework of risk based inspection and repair planning was presented to optimize for the ship structures subjected to corrosion deterioration. The planning problem was formulated as an optimization problem where the expected lifetime costs were minimized with a eonstraint on the minimum aceeptable rehability index. The safety margins were established for the inspection events, the repair events and the failure events for ship struetures. Moreover, the formulae were derived to calculate failure probabihties and repair probabilities. Based on them, a component subjected to corrosion is investigated for illustration of the process of selecting the optimal inspection and repair strategy. Furthermore, some sensitivity studies were provided. The results show that the optimal inspection instants should take place before the reliability index reaches the minimum acceptable reliability index. The optimal target failure probability is 10^-3. In addition, a balance can be achieved between the risk cost and total expected inspection and repair costs by means of the risk-based optimal inspection and repair method, which is very effective in selecting the optimal inspection and repair strategy.
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| 关 键 词： | 观察修理 最优化 侵蚀模型 船舶结构 |
Risk Based Optimal Inspection and Repair Planning for Ship Structures Subjected to Corrosion Deterioration |
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| LI Dian-qing,ZHANG Sheng-kun and TANG Wen-yong School of Naval Architecture and Ocean Engineering,Shanghai Jiao Tong University,Shanghai ,China. Risk Based Optimal Inspection and Repair Planning for Ship Structures Subjected to Corrosion Deterioration[J]. China Ocean Engineering, 2004, 18(2): 185-196 |
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| Authors: | LI Dian-qing ZHANG Sheng-kun TANG Wen-yong School of Naval Architecture Ocean Engineering Shanghai Jiao Tong University Shanghai China |
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| Affiliation: | LI Dian-qing,ZHANG Sheng-kun 1 and TANG Wen-yong School of Naval Architecture and Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200030,China |
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| Abstract: | A framework of risk based inspection and repair planning was presented to optimize for the ship structures subjected to corrosion deterioration. The planning problem was formulated as an optimization problem where the expected lifetime costs were minimized with a constraint on the minimum acceptable reliability index. The safety margins were established for the inspection events, the repair events and the failure events for ship structures. Moreover, the formulae were derived to calculate failure probabilities and repair probabilities. Based on them, a component subjected to corrosion is investigated for illustration of the process of selecting the optimal inspection and repair strategy. Furthermore, some sensitivity studies were provided. The results show that the optimal inspection instants should take place before the reliability index reaches the minimum acceptable reliability index. The optimal target failure probability is 10 -3 . In addition, a balance can be achieved between the risk cost and total expected inspection and repair costs by means of the risk-based optimal inspection and repair method, which is very effective in selecting the optimal inspection and repair strategy. |
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| Keywords: | risk inspection and repair optimization corrosion model ship structures |
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