| A numerical model for the prediction of ship motions in shallow waters is discussed in this research. The present study is divided into three parts. First, the theoretical procedure for the calculation of the hydrodynamic terms of equations, which describe the ship motion in shallow water, is presented. The linear strip theory was applied to the modeling because of its computational simplicity.; The second part of the study describes the development of a computational code to evaluate the five degree-of-freedom of motion of a ship in the frequency domain. An algorithm was established for the development of the computational code. A computational program, SWSMPCZ, was developed to predict five degree-of-freedom motion response amplitude operators and responses in random seas. The TMA spectrum was selected to represent irregular waves in shallow water.; Finally, the verification and validation of SWSMPCZ were completed by the direct comparison of the results from the proposed code and the experimental data obtained by Oortmerssen, and Staha of the Series-60 tanker ship and 40-foot lobster boat, respectively. The comparison resulted in a good agreement between the experimental and the calculated responses. Extensive experiments and verification for this computational program in the form of a knowledge database should be used for the future design stage of vessels are recommended in the further research. |
