A Multi-Object Optimization Method for the Shafting Alignment in Ship Propulsion Systems

A high-quality shafting alignment process is essential to the long-term safety and reliable oper ation of propulsion systems,which is also crucial to the ship navigation.Therefore,the development of an optimal shafting alignment scheme is a priority in propulsion system researches.On the basis of the estab lished multi-objective optimization model,the optimization design variables,objective functions and con straint conditions are defined respectively.Then,a certain type of ship propulsion shafting system is adopt ed as the research object,on which the proposed multi-objective optimization is performed.Compared with the results obtained by Kamewa,it is observed that a better equilibrium among the loads can be ob tained through the multi-objective optimization method.Meanwhile,the back shaft bracket bearing load is also reduced by a certain degree.Thus,the presented method is successfully validated.