This study develops a novel automatic nesting system for shipbuilding using the branch-and-bound method. The previous studies mainly discussed strip-packing problem, which is related to the arrangement of parts on the base material. In addition to the strip-packing problem, the present study also considers the bin-packing problem, which is the distribution of parts to different base materials. Therefore, the nesting problem in shipbuilding is defined as a combinatorial optimization problem that encompasses both the bin-packing and strip-packing problems. Based on the above-mentioned problem definition, the solution space of the nesting problem is greatly enhanced, and a lot of time is required to determine the optimal solution. Therefore, the branch-and-bound method is used in this study to solve the above-mentioned combinatorial optimization problem considering the trade-off relation between improving the optimality (i.e., yield rate) and reducing the computation time. This paper discusses the proposed method in detail. In addition, an actual nesting problem is solved using the proposed method to test its validity.
Journal of Marine Science and Technology – Springer Journals
Published: May 31, 2018
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