Citation:
Hassan Zakerdoost,Hassan Ghassemi and Mahmoud Ghiasi.Ship Hull Form Optimization by Evolutionary Algorithm in Order to Diminish the Drag[J].Journal of Marine Science and Application,2013,(2):170-179.[doi:10.1007/s11804-013-1182-1]
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Ship Hull Form Optimization by Evolutionary Algorithm in Order to Diminish the Drag
Hassan Zakerdoost,Hassan Ghassemi and Mahmoud Ghiasi.Ship Hull Form Optimization by Evolutionary Algorithm in Order to Diminish the Drag[J].Journal of Marine Science and Application,2013,(2):170-179.[doi:10.1007/s11804-013-1182-1]
Info
- Title:
- Ship Hull Form Optimization by Evolutionary Algorithm in Order to Diminish the Drag
- Author(s):
- Hassan Zakerdoost; Hassan Ghassemi and Mahmoud Ghiasi
- Affilations:
- Keywords:
- optimization; evolutionary algorithms; drag; thin-ship theory
- DOI:
- 10.1007/s11804-013-1182-1
- Abstract:
- This study presents a numerical method for optimizing hull form in calm water with respect to total drag which contains a viscous drag and a wave drag. The ITTC 1957 model-ship correlation line was used to predict frictional drag and the corrected linearized thin-ship theory was employed to estimate the wave drag. The evolution strategy (ES) which is a member of the evolutionary algorithms (EAs) family obtains an optimum hull form by considering some design constraints. Standard Wigley hull is considered as an initial hull in optimization procedures for two test cases and new hull forms were achieved at Froude numbers 0.24, 0.316 and 0.408. In one case the ES technique was ran for the initial hull form, where the main dimensions were fixed and the only variables were the hull offsets. In the other case in addition to hull offsets, the main dimensions were considered as variables that are optimized simultaneously. The numerical results of optimization procedure demonstrate that the optimized hull forms yield a reduction in total drag.
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