碩士 / 國立高雄海洋科技大學 / 造船及海洋工程研究所 / 105 / The resonance of the ship accommodation with vibrational loads of the propulsion system can cause crew discomfort and induce failure of structure and instrument. To analyze the resonance risk, in the past, shipyard uses empirical formulas to evaluate ship vibration characteristics in design stage. Empirical formulas, however, cannot fit all accommodation varieties, and hence finite element method (FEM) becomes the mainstream of the recent vibration analysis.
Building a full-ship numerical model is time-consuming and prone to delay the schedule of full-ship vibrational analysis, missing the opportunities to alter the design in early stage. The goal of this research is to develop a simplified numerical model to improve the vibration analysis efficiency for container vessels' accommodation. This research utilizes MSC Nastran and Patran to explore simplified numerical models with high accuracy and low computation time.
The result of this research indicates that both the container vessels accommodation and the ship hull have unique vibration characteristics. With proper simplification and boundary condition settings, the natural frequency derived from the simplified model is within 5% of the natural frequency derived from the full-ship numerical model. Hence, the developed simplified model can help understand the accommodation's vibration characteristics as well as its resonance risk in early stage.
| Identifer | oai:union.ndltd.org:TW/105NKIM0345008 |
| Date | January 2017 |
| Creators | Lu, Ya-Yun, 呂雅雲 |
| Contributors | Chen, Hong-Chung, 陳宏鐘 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 101 |
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