Research On Fast Forecast Method For Full Hull Ship Resistance

Forecasting the ship hull resistance has been the difficulty of the design process, and the traditional empirical formula and atlas are difficult to meet the changing patterns of modern ship. Because calculation methods can not meet the parameters of the new ship type and accuracy is far less than the requirements of engineering and scientific applications. Therefore,the development of fast and accurate prediction method for ship resistance and energy distribution of the energy throughout the vessel monitoring system has a key role , not only can save energy and reduce carbon dioxide emissions , with lower energy consumption and energy saving benefits , but also can improve shipping efficiency and impact of the economic performance of the ship.In this paper aimed at energy distribution and establishing research vessel ship energy efficiency evaluation system, sums up the ship resistance theoretical progress in the course of development and research, detailed theoretical calculation of the current domestic and international shipping methods trends and resistance prediction methods. And according to the Froude assume that the total resistance of the ship is divided into two parts, the friction coefficient based on the empirical formula and residual resistance based on atlas data.Innovative use of the total, frictional resistance under different speed ratio changes within a certain range, assuming friction calculate the correct, the calculated residual resistance and ship model test converted by residual resistance were compared.Based on a large number of ship model test data and trial data, comparison and analysis, presents a parameter associated with the ship's residual resistance coefficient correction factor. Use modified ship resistance prediction method to the following real ship resistance verification, the results show that the method greatly improves the ship resistance calculation accuracy.Ship resistance calculations and experimental studies based on the energy distribution of the ship, it will ship the majority of the field of engineering researchers performed more in-depth study of a new hull resistance prediction method provides a novel idea. By calculation shows that the resistance of different ship resistance energy consumption of each component system energy consumption accounted for the proportion of the ship,in order to provide the basis for energy conservation work has important significance.