A reinforcement learning based hybrid evolutionary algorithm for ship stability design

Osman Turan, Hao Cui

Research output: Chapter in Book/Report/Conference proceedingChapter


Over the past decades, various search and optimisation methods have been used for ship design – a dynamic and complicated process. While several advantages of using these methods have been demonstrated, one of the main limiting factors of optimisation applications in ship design is the high runtime requirement of the involved simulations. This severely restricts the number of real applications in this area. This chapter presents a hybrid evolutionary algorithm that uses reinforcement learning to guide the search. Through giving and correcting the search direction, the runtime of optimisation can be effectively reduced. The NSGA-II, a well known multi-objective evolutionary algorithm, is utilised together with reinforcement learning to form the hybrid approach. As an important optimisation application field, the ship stability design problem has been selected for evaluating the performance of this new method. A Ropax (roll on/roll off passenger ship) damage stability problem is selected as a case study to demonstrate the effectiveness of the proposed approach.
Original languageEnglish
Title of host publicationVariants of Evolutionary Algorithms for Real-World Applications
EditorsRaymond Chiong, Thomas Weise, Zbigniew Michalewicz
Place of PublicationBerlin
Number of pages23
Publication statusPublished - 5 Nov 2011


  • ship design
  • optimisation
  • hybrid evolutionary algorithm


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