Case studies on the probabilistic characteristics of ultimate strength of stiffened panels with uniform and non-uniform localized corrosion subjected to uniaxial and biaxial thrust

被引:18
作者
Cui, Jinju [1 ,2 ,3 ]
Wang, Deyu [1 ,2 ,4 ]
Ma, Ning [1 ,2 ,5 ]
机构
[1] Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai, Peoples R China
[2] Collaborat Innovat Ctr Adv Ship & Deep Sea Explor, Shanghai, Peoples R China
[3] Shanghai Jiao Tong Univ, Mulan Bldg B215,800 Dongchuan Rd, Shanghai 200240, Peoples R China
[4] Shanghai Jiao Tong Univ, Mulan Bldg B407,800 Dongchuan Rd, Shanghai 200240, Peoples R China
[5] Shanghai Jiao Tong Univ, Mulan Bldg B717,800 Dongchuan Rd, Shanghai 200240, Peoples R China
关键词
Bi-axial ultimate strength; Bottom structures; Uniform corrosion; Non-uniform localized pitting corrosion; Probabilistic characteristics; COMBINED TRANSVERSE THRUST; LATERAL PRESSURE; RELIABILITY; PLATE; BEHAVIOR; WASTAGE;
D O I
10.1016/j.ijnaoe.2018.02.011
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
Based on Nonlinear Finite Element Analysis (NFEA), this paper focuses on the bi-axial ultimate strength of typical bottom structures under corrosion. On one hand, uniform and not simultaneous corrosion across different structures is introduced, and surrogate models by Gaussian Process (GP) are built for both longitudinal and transverse cases individually, and corresponding probabilistic characteristics are investigated; meanwhile, corrosion effects on interaction between bi-axial stresses at ultimate state are studied. On the other hand, non-uniform localized pitting corrosion of normally distributed circular shapes is introduced, and different pitting corrosion densities are considered; structural bi-axial ultimate strengths under pitting corrosion are studied, and the results are compared with that from equivalent uniform corrosion; the probabilistic characteristics of structural ultimate strength in life cycle are studied; finally, the ultimate strength under randomly distributed pitting corrosion is compared with results from normally distributed pitting and uniform corrosion under various boundary conditions. (C) 2018 Society of Naval Architects of Korea. Production and hosting by Elsevier B.V.
引用
收藏
页码:97 / 118
页数:22
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