| Summary: | 碩士 === 國立成功大學 === 系統及船舶機電工程學系 === 105 === This research uses the Levenberg-Marquardt Method and the commercial package CFD-ACE+ in the development of a submarine shape optimization design. It’s mainly divided into two directions: direction one is to explore the optimal shape of a submarine’s main body; and direction two is to explore the optimal sail shape and its optimal location. First, with reference to the existing basic submarine model, DARPA-SUBOFF, and under the condition of a fixed volume, we observe that resistance changes under different speeds. Using the parameters of the known model to calculate and explore and reduce the resistance of the model is the goal. To optimize this submarine’s model shape, we find the best body geometry, thereby making the total resistance reduced. Next, the submarine sail is the discussion target under the condition that the model sail volume only changes a little bit. The shape of the curvature of the front surface of the sail and its central position is the changed parameter, and then we correct and optimize it. Afterwards, we try to find the best curvature and the best position to reduce the total resistance. From the results, our optimization can be seen. The main body (Hull) shape doesn’t change. But the sail parameters change, which not only optimizes its position and the curvature of its surface, but also the two together achieve optimization. In this case, the resistance reduction phenomenon has occurred.
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