碩士 / 國立高雄海洋科技大學 / 造船及海洋工程研究所 / 103 / When container ship develops into a larger scale, it places an extra load on its hull structure. Spring effect will cause the ship to bear additional load, which results in substantial reduction in the fatigue life. According to the CSBC’s 8,000TEU container ship research, the results indicated that the fatigue damage and the stress concentration were easily yielded at the hatch corner of the midship. In order to ameliorate this problem, our research group proposed that topological optimization method can improve the shape of the hatch corner and increase the fatigue life.
Our research began with using numerical simulation package Homer2.0, which was developed by BV to calculate the stress response amplitude operators by the hydro-elastics analysis for the container ship. Next, we incorporated the results of the stress response amplitude operators with the numerical stimulation to analyze the spectral fatigue analysis (SFA) of the hatch corner by Stress RAOs, wave scatter diagram, and S-N curve using BV HydroStar. Thus, topological optimization method computed the optimal shape of the hatch corner by using element analysis software, ABAQUIS. Most importantly, we used the result of the optimal shape to calculate SFA of the container ship. Consequently, we confirmed that topological optimization method can greatly increase the fatigue life at least 12 years more than original design of the same area of the hatch corner. Simultaneously, we also compared different proportional and reserved areas of the hatch corner to calculate the fatigue life analysis.
In conclude, we verified that topological optimization method not only can design the optimal shape of the hatch corner, but also increase fatigue life of the container ship.
| Identifer | oai:union.ndltd.org:TW/103NKIM0345004 |
| Date | January 2015 |
| Creators | Tzu-Ying Lee, 李姿瑩 |
| Contributors | Guang-Min Luo, 羅光閔 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 81 |
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