Reliability of Hull Girder Ultimate Strength of Steel Ships

4th International Conference on Advanced Engineering and Technology

Da-Wei, Gao^1 ; Gui-Jie, Shi^2

School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai

200093, China^1

Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, State Key Laboratory of Ocean Engineering, China Strategy Institute of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai

200135, China^2

关键词: Container ships;    Evaluation index;    First order method;    Large container ships;    Nonlinear finite element method;    Safety evaluations;    Structural redundancy;    Ultimate strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/317/1/012036/pdf
DOI  :  10.1088/1757-899X/317/1/012036

来源: IOP

【 摘 要 】

Hull girder ultimate strength is an evaluation index reflecting the true safety margin or structural redundancy about container ships. Especially, after the hull girder fracture accident of the MOL COMFORT, the 8,000TEU class large container ship, on June 17 2013, larger container ship safety has been paid on much more attention. In this paper, different methods of calculating hull girder ultimate strength are firstly discussed and compared with. The bending ultimate strength can be analyzed by nonlinear finite element method (NFEM) and increment-iterative method, and also the shear ultimate strength can be analyzed by NFEM and simple equations. Then, the probability distribution of hull girder wave loads and still water loads of container ship are summarized. At last, the reliability of hull girder ultimate strength under bending moment and shear forces for three container ships is analyzed by using a first order method. The conclusions can be applied to give guidance for ship design and safety evaluation.