A Moored Ship Motion Analysis in Realistic Pohang New Harbor and Modified PNH

In recent decades, loading and unloading of moored ship is difficult task during the extreme wave oscillation in a harbor during the seasonal weather condition. In this paper, we have analyzed the six different modes of ship motion such as surge, sway, heave, roll, pitch, and yaw components using six degree of freedom for Pohang New Harbor (PNH) and modified PNH. A general mathematical formulation is designed based on Helmholtz and Laplace equation, which is solved byusing 3-D Boundary Element Method (BEM). Hydrodynamic forces acting on the mooring ropes and fenders also considered to determine added mass and damping coefficient in PNH. Based on simulation results, some tactics such as adding breakwater at entrance is implemented in modified PNH. In result, the added mass and damping coefficient of six modes of moored ship motion is reduced in modified PNH. Thus, the present numerical model can be implemented to any other realistic harbor with complex geometry to analyze the moored ship motion.