ON STEADY HORIZONTAL FORCES AND MOMENT DUE TO SHORT WAVE ACTING ON SHIPS IN MANEUVERING MOTION

Publisher Summary This chapter presents calculation formula for predicting steady horizontal forces and moment due to short waves acting on ships in maneuvering motion. Effect of nonuniform flow around ships on deformation of short waves is taken into account, and reflection region of short waves around ships' hull is clarified in the method. One of features of the method is that it explains effects of maneuvering motion on steady horizontal forces and moment due to short waves by regarding them as effects of nonuniform flow around ships in maneuvering motion on short waves' refraction and reflection. It is also noticeable that integral region to calculate steady horizontal forces and moment due to short waves is defined clearly. Results are compared with experimental data for a very large crude oil carrier (VLCC) model test and the presented method is confirmed to be practically useful to predict steady horizontal forces and moment due to short waves acting on ships in maneuvering motion. Ship form effects are investigated by comparing calculation for the VLCC and a training ship. The calculation method is considered to be applicable to estimate not only steady horizontal forces and moment due to short waves acting on ships in maneuvering motion, but also maneuvering motion of ships in short waves by time simulation.