Full-scale ship propeller torque in wind and waves estimated by free-running model test

摘要

A free-running model test in which a ship model controlled by the rudder effectiveness and speed correction using the auxiliary thruster was carried out. The model runs in long-crested irregular waves and under wind loads simulated by the wind loads simulator. The authors' procedure to analyze the data of the controlled ship model estimated the full-scale propeller torque in wind and waves and revealed how the scale effects appeared in the propeller torque. The numerical simulation for the model and the full-scale ship confirmed that the ship model control ensured the similarity of ship motion in external forces.