STUDY ON THE MANEUVERING SIMULATION OF A SHIP WITH WAVE EFFECT IN REGULAR WAVES

Abstract

The interest on the prediction of a ship’s maneuverability in waves becomes larger, because the regulation of EEDI and the guideline of minimum propulsion power of IMO become stronger. Generally to predict the maneuverability of a ship inwaves the model tests and simulation method are used. However the simulation method is more reasonable than model tests in time and cost. In this research the maneuvering simulations of S-175 container ship in regular waves are conducted. To simulate, the wave drift forces and moments are calculated, and the 4 degree of freedom maneuvering mathematical equations are used in the consideration of wave effect. The target ship of this research is S-175 container ship. The simulation results are compared with the free running model tests in regular waves by Yasukawa & Nakaya-ma(2009). To improve the accuracy of simulation results the wave drift forces and moments are obtained with the drift angle considering duringturning test. The wave effect at the approach speed, rudder force and thrust force are checked at the simulation. The discussion is also presented in this paper.