An Optimization Method of Stern Hull Form to Minimize Brake Horse Power (2nd Report)

Abstract

This is the second report of hull form optimization to minimize Brake Horse Power (BHP). In the previous report, two hull form optimization techniques, Sequential Quadratic Programming (SQP) and Surrogated-Based Optimization (SBO), for minimizing BHP were proposed, and it was shown that the optimization methods are effective for obtaining high performance hull forms. Recently most of ships are equipped Energy Saving Device (ESD) to improve their performance. Some ESDs have energy saving effect of over 5%. However their effect is strongly dependent of a shape of a main hull. Similarly dimensions of a propeller are dependent of a shape of a main hull. Therefore hull form optimization considering ESD effect and propeller design is necessary for total BHP reduction.