Study on the Ultimate Strength of River-to-Sea Ships
- W. Wang (Marine Design & Research Institute of China / Shanghai Jiao Tong University / Zhejiang Ocean University) | Y. H. Xie (Zhejiang Ocean University) | B. Y. Geng (Zhejiang Ocean University) | G. Q. Li (Zhejiang Ocean University)
- Document ID
- International Society of Offshore and Polar Engineers
- The 28th International Ocean and Polar Engineering Conference, 10-15 June, Sapporo, Japan
- Publication Date
- Document Type
- Conference Paper
- 2018. International Society of Offshore and Polar Engineers
- ultimate strength, gradual collapse analysis, river-to-sea ship, nonlinear FEM method
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- 12 since 2007
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An experimental study on the ultimate strength of the river-to-sea ship is presented in this paper. The relationships of load-strain and load-deflection are obtained. The methods of the gradual collapse process and nonlinear FEM were adopted to predict ultimate strength of the ship, which both show good agreement with the test results. What’s more, different loading methods have been studied and compared. The result of the experiment proves the reliability and rationality of the theoretical method in the research of ultimate strength. This experiment will provide basis for the study of the structure optimization of the river-to-sea ship.
The ship’s ultimate strength is an important index to measure the ship’s structural strength. The ship’s ultimate strength is usually assessed using the ultimate moment that ship can sustain. The damage of the ship is a very complicated process, and the entire process of the ship’s collapse and the plastic-buckling performance of the ship can be obtained through studying the ultimate strength of the ship by experiment.
The experiment of the ultimate strength of the actual ship is expensive and hard to conduct due to the restriction of the test site. Usually the actual ship is scaled down to analyze the nature of the ultimate strength. Many domestic and foreign scholars have studied the ultimate strength of the ships experimentally (Sugimura and Suzuki, 1966; Xu, Cui, Leng, Sun and Qi, 2000; Yao, Fujikubo and Yanagihara, 2002).
The large scale experimental model has been designed, and the experiment of the ultimate strength has been conducted. What's more, the methods of gradual collapse analysis and nonlinear FEM were adopted to predict ultimate strength of the model, and the rationality of the numerical simulation has been verified by comparing the numerical results with the experiment (Huang, Chen and Luo, 1996; Nishihara, 1984; Yang, Wang and Shi, 2004).
STUDY OF EXPERIMENT
The ship's main dimensions are as follows: overall length Loa=199.99m, length between perpendiculars LPP=192m, breadth B=32.26m, depth D=15.4m. Considering the size of the platform in the laboratory and the loading ability of the laboratory, the middle section of the ship has been chosen for modelling. Combining with π theorem and the experience, the ultimate strength and the ability of the weld have been studied in the experiment. The final dimensional scale ratio and thickness ratio are 10:1 and 6:1, respectively. Mild steel is selected to replace the hightensile steel. Finally the main dimensions of the experimental model are as follows: length= 10.4m, width= 3.23m, depth= 1.54m.
|File Size||2 MB||Number of Pages||6|