Research On High Seakeeping Perfomance Craft Under Abominable Sea Conditions

With the continuous development of the world,people’s demand for ship performance has increased a lot.High-performance ships have emerged in this large environmental demand,and they have been widely used in military and civilian fields.Among them,the ultra-high-speed ship has gained fame because of its powerful rapidity,which has aroused widespread concern.As a kind of high-performance ship,surfboat has been studied for a long time.At the beginning of the last century,people produced this high-performance boat that relied on hydrodynamic lift for mass production and put it into daily use.However,with the further development of technology,people’s requirements for the seaworthiness of surfboats are getting higher and higher.Therefore,the research on the seaworthiness of surfboats as a new research focus has received widespread attention from all walks of life.This article is based on a navy rigid inflatable boat.First,Maxsurf is used to design the taxi boat.Then,STAR CCM + computational fluid dynamics software is used.Based on the unsteady RANS equation,the corresponding turbulence model is selected.The resistance and attitude changes at different speeds are calculated,and then the attitude and resistance are compared.In order to better analyze the performance of the surfboat,two-phase flow cloud diagram,pressure analysis diagram and stern waveform diagram are given.The law of attitude and response of surfboat is explored.Explored the state of gliding and the speed required to produce dolphins response.Then,the wave resistance of the surfboat under regular and irregular waves is calculated.Firstly,the rule that the heave and pitch response of the surfboat under different wave lengths at different wavelengths and length ratios of the surfboat with the length ratio is studied.Then the effects of different speeds and multiple wave directions on the wave resistance of the surfboat were studied.The changes of the pitching and heave responses of the surfboat under the conditions of transverse waves,slanting waves,and heading waves are mainly studied.The response amplitude operators are used to accurately express their laws.Finally,in order to be closer to the reality,the P-M spectrum is used to predict the wave resistance of the surfboat under irregular waves.The results show that the seakeeping performance of the planing boat is excellent.