Spatial Probabilistic Modeling of Corrosion in Ship Structures
Spatial Probabilistic Modeling of Corrosion in Ship Structures
复制标题
船舶结构腐蚀的空间概率建模
DOI:
10.1115/1.4035399
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Straub D.
中科院分区:
文献类型:
--
作者:
Luque J;Hamann R;Straub D.
Corrosion in ship structures is influenced by a variety of factors that are varying in time and space. Existing corrosion models used in practice only partially address the spatial variability of the corrosion process. Typical estimations of corrosion model parameters are based on averaging measurements for one ship type over structural elements from different ships and operational conditions. Most models do not explicitly predict the variability and correlation of the corrosion process among multiple locations in the structure. This correlation is of relevance when determining the necessary inspection coverage, and it can influence the reliability of the ship structure. In this paper, we develop a probabilistic spatiotemporal corrosion model based on a hierarchical approach, which represents the spatial variability and correlation of the corrosion process. The model includes as hierarchical levels vessel–compartment–frame–structural element–plate element. At all levels, variables representing common influencing factors (e.g., coating life) are introduced. Moreover, at the lowest level, which is the one of the plate element, the corrosion process can be modeled as a spatial random field. For illustrative purposes, the model is trained through Bayesian analysis with measurement data from a group of tankers. In this application, the spatial dependence among corrosion processes in different parts of the ships is identified and quantified using the proposed hierarchical model. Finally, how this spatial dependence can be exploited when making inference on the future condition of the ships is demonstrated.
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DOI:
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发表时间:
2009
期刊:
影响因子:
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作者:
D. Štraub;V. Malioka;M. Faber
通讯作者:
M. Faber
DOI:
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发表时间:
2014
期刊:
影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
2002
期刊:
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作者:
M. Maes
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发表时间:
2012
期刊:
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作者:
Shenwei Zhang;Wenxing Zhou;M. Al;S. Kariyawasam;Hong Wang
通讯作者:
Hong Wang
DOI:
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发表时间:
2003
期刊:
影响因子:
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作者:
G. Wang;J. Spencer;T. Elsayed
通讯作者:
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