Hull deflection in still water and in waves of a pipe layer barge

8th International Conference on Advanced Concepts in Mechanical Engineering

Crudu, L.^1,2 ; Neculet, O.^2 ; Marcu, O.^3

Naval Architecture Faculty, Dunarea de Jos University of Galai, Romania^1

NASDIS Consulting, Galai, Romania^2

Progressive Ship Design, Galai, Romania^3

关键词: Building process;    Computer codes;    Dynamic forces;    Early design stages;    Heading angles;    Potential theory;    Response amplitude operator;    Wave frequencies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/444/6/062002/pdf
DOI  :  10.1088/1757-899X/444/6/062002

来源: IOP

【 摘 要 】

The evaluation of ship's hull deflection in still water and in waves is an important step which has to be performed starting with early design stages. The different scenarios are depending on the loading cases to be considered as most dangerous ones which could appear during ship's life time. The paper is focused on the evaluation of forces and moments in calm water and in waves, the last ones being a result of the motions and accelerations of a pipe layer barge in waves for a range of wave frequencies and heading angles. The static case is important due to the implications in the building process and docking. Consequently, the bending moments and shear forces in hogging and sagging conditions are evaluated. The dynamic case could have major implications during operational time when large dynamic forces and moments could lead to dramatic effects. The analysis has been performed and consists in the evaluation of Response Amplitude Operators (RAO) of motions and the induced forces and moments which are calculated based on a computer code using the potential theory. Then, hull deflections are evaluated using FEMAP-NX-NASTRAN.