| Summary: | 碩士 === 國立成功大學 === 系統及船舶機電工程學系 === 104 === The objective of the present study is to apply the optimization technique based on the particle swarm optimization algorithm to improve the ship hull forms with respect to the wave resistance and the seakeeping characteristics. There are two main parts in the study: (I) Numerical simulations and (II) The Experimental test for verification.
The first part (I), is to apply the software including the computation fluid dynamics and ship motion to estimate the hull design factors, i.e. total resistance, pitch and heave. The single- and multi-objective particle swarm optimization algorithm are applied to produce the optimized shoulder-bulbous bow shape instead of the optimized bulbous bow in order to obtain more improvement on wave-making resistance and seakeeping characteristics than before. The second part (II), is to handle the model test in the NCKU SNAME towing tank to verify the reliability and the accuracy of the new optimized shoulder-bulbous bow shape for a container ship, including the bare hull resistance tests in calm water and the seakeeping tests in head waves. The related verifications based on the original ship model are firstly done by comparing the experimental results and CFD calculations.
After a series of analysis, we find that the multi-objective optimization approach including heave, pitch and wave-making resistance is proved to be inefficient in this study. Hence we suggest to apply single-objective optimization approach based on the wave-making resistance to make the ship hull optimization design.
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