碩士 / 國立高雄海洋科技大學 / 航海科技研究所 / 97 / It is well known that ships operating in the vicinity of a lateral bank experience a significant yaw moment and sway force. This bank effect has a major impact on the maneuvering properties of the ship and must therefore be properly understood to ensure the safe passage of the ship through the restricted and wide waterway. The phenomena also appear in the interaction process between two ships for overtaking and head-on encounters. Accordingly, this study performs a series of simulations using commercial FLOW-3D® computational fluid dynamics (CFD) software and the KRISO 3600 TEU container ship model to examine the effects of the ships speed and distance between two ships for overtaking and head-on encounters on the magnitude and time-based variation of the yaw angle and sway force. Overall, the results presented in this study confirm the feasibility of the CFD modeling approach as a means of obtaining detailed insights into the interaction of two ship hydrodynamics without the need for time-consuming and expensive ship trials.
In the thesis, the model describes a situation in which a ship 2, with speed V2, is being overtaken by a faster ship 1, of speed V1. The interaction of two ships interaction for the analysis of yaw angle and sway force and yaw moment was carried out in this thesis. Then, a model is selected to demonstrate the model capability for handling head-on encounters between two ships in which a ship, with speed V4, is being headed-on by another ship, of speed V3. For the purpose of this thesis, a series example of 3D ship-ship interaction problems should be able to fulfill our requirements of the CFD applications. Additionally, the detail flow characteristics, such as velocity distribution, pressure and hydrodynamics force are sketched in this study. Overall, the results presented in this study confirm the validity of the CFD simulation approach for modeling the bank effect phenomenon, ships interaction for overtaking and head-on encounters and provide useful guidelines for ship handling maneuvers involving meeting, passing, docking, tugboat operations, and so forth in restricted and wide water.
| Identifer | oai:union.ndltd.org:TW/097NKIM8297006 |
| Date | January 2009 |
| Creators | Yen Chih CHEN, 陳彥志 |
| Contributors | 羅德章 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 85 |
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