Shape optimization of bow bulbs with minimum wave-making resistance based on Rankine source method |
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Authors: | Bao-ji Zhang |
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Institution: | College of Ocean Environment and Engineering, Shanghai Maritime University, Shanghai 201306, China |
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Abstract: | The hull form optimization concerns one of the most important applications of wave-making resistance theories. In recent years,
scholars can determine the hull form by using the optimization method based on the computational fluid dynamics (CFD) and
other mathematical techniques. In this paper, the hull form optimization method based on the Rankine source method and nonlinear
programming (NLP) is discussed; in the optimization process, a hull form modification function is introduced to represent
an improved hull surface and to generate a new smooth hull surface by changing its frame lines and bow stem profiles under
the prescribed design constraints. Numerical example is given for a practical container hull form. Finally, shape optimization
of bow bulls is shown for non-protruding and protruding bow bulls. This study presents a simplified and practical design method
to the select frame lines of bow bulls. |
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