Numerical study on motions of a containership on head waves

6th ModTech International Conference - Modern Technologies in Industrial Engineering

Pacuraru, S.^1 ; Domnisoru, L.^1 ; Pacuraru, F.^1

Department of Naval Architecture, Dunarea de Jos University of Galati, Domneasca Street 111, 800201, Romania^1

关键词: 3-D numerical analysis;    Computational fluid dynamics methods;    Experimental models;    Numerical approaches;    Numerical results;    Regular and irregular waves;    Seakeeping performance;    Ship hydrodynamics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/400/8/082016/pdf
DOI  :  10.1088/1757-899X/400/8/082016

来源: IOP

【 摘 要 】

Seakeeping performance represents an important chapter in the study of ship hydrodynamics. Computation of ship motions, amplitudes and accelerations conducts to the prediction of ship safety and security during operation. The experimental measurements of ship motions on regular waves are considered accurate methods, but still expensive. The paper presents the study of motions of a container ship in head regular and irregular waves. The 3D numerical analysis is performed based on BEM boundary element method, a CFD computational fluid dynamics method. In the numerical approach, seakeeping analysis was performed by using potential flow method. The comparison of numerical results for heave and pitch motions with the benchmark experimental tests reveals the accuracy and the validation of the numerical method. The numerical CFD-BEM investigation of ship motions at two forward speeds, 12 respectively 24 knots, were performed for the ship length to wave-length ratio in a range of 0.5-1.95. Based on the irregular wave results and by seakeeping limit criteria, the container ship navigation limits in head waves are analysed. The study results are pointing out good agreement between numerical and experimental models, the methodology being for practical design.