The Optimization Design Research On Propeller Shaft Bracket Of High Speed Ship Based On Genetic Algorithm

Ship design should achieve the goals reducing building cost and playing its unique performance. That is to say, it should get the best performance with minimal cost. Optimum design of ship structure has a long history of development. The use of many traditional optimization algorithms has been very mature. In recent years, the genetic algorithm has been widely concerned in the field of structural optimization, with its simplicity and powerful robustness.Propeller shaft bracket structure plays the role of supporting shaft and ensuring propeller work normally. This requires that the shaft bracket must have sufficient strength and stiffness. But if the size is too large, that will cause hull weight and ship resistance increase. Fatherly, that will affect the fast of ship. Therefore, the optimizing of propeller shaft bracket is a very important issue.On the basis of reading a large number of references, this paper analyzed and synthesized the genetic algorithm, introduced the basic features of structural optimization. For the features of high speed ship craft shaft bracket, it established the mathematical models and mechanical models for optimal design, and carried out the optimal design with genetic algorithm. On this basis, it compiled the optimal program with MATLAB and executed the program with examples. Finally, it established the model of shaft bracket with finite element analysis software ANSYS, then verified and analyzed the optimization results. It proved that the optimized results meet the strength and stiffness. So it showed that genetic algorithm has high credibility and feasibility on propeller shaft bracket structure optimization.