Development Of Optimization Module Of OPTShip-SJTU, The Numerical Optimization Software For Hull Profile

For thousands of years,the ship has been an important tool in the process of human progress,ship technology,but also for economic and social development has provided a guarantee.With the energy supply becoming more and more tense in recent years,the study on improving the energy efficiency and energy saving and emission reduction for the ship has been paid more and more attention by the academia and the engineering community for the sake of protecting the environment and improving the economic efficiency.The ship line design,as an important part of the ship design process,has been the ship designers' eager to further improve the link.Many different methods have been proposed and realized in order to realize the optimal design of ship line.However,no matter what kind of optimization design methods,are inseparable from an efficient and reasonable optimization algorithm.As the link of optimal design of drive line,the choice of optimization algorithm determines whether the optimization method can find an optimal solution,which is the ultimate goal of ship design.Therefore,the research and development of the optimization algorithm is very important to realize the ship type optimization.On the other hand,hydrodynamic performance is the key objective in the process of ship profile optimization,and optimization design requires repeated iteration process.Therefore,reducing the forecast cost of hydrodynamic performance is also the optimization process must consider.At present,mainstream computational fluid dynamics(CFM)tools often have high demands on computer hardware and computation time.This paper explores the combination of high-efficiency numerical prediction tools and approximate model techniques,greatly improving the prediction efficiency of hydrodynamic performance.For the future effective and effective basis for ship optimization.In this paper,a variety of optimization algorithms and approximate model techniques are investigated,and the basic characteristics and advantages and disadvantages of each method are summarized.Then,using the C++ programming language as the basic development tool,the singleobjective genetic algorithm,the multi-objective genetic algorithm,the response surface method and the Kriging method are implemented respectively,and each method is verified to achieve the optimal algorithm and approximation Model module.On this basis,this paper integrates the optimization algorithm and the approximate model module,the ship-type transformation module and the ship hydrodynamic performance analysis module to form a new software OPTShip-SJTU for the ship hull line numerical optimization design.Through several optimization examples,OPTShip-SJTU software and validate some of the optimization results to ensure the reliability of OPTShip-SJTU software and its optimization results.