碩士 / 國立成功大學 / 系統及船舶機電工程學系碩博士班 / 99 / This report aims to research on the structure vibration of coastal gas pipelines caused by vortex shedding under the impact of ocean waves. Following are the three steps of the research: first, to analyze by software simulation; second, to establish the experimental structure of the software and hardware; third, to compare with the simulation analysis and to analyze the experiment data and to compare the simulation.
In terms of simulation analysis, STAR-CCM+ software is used to analyze flow field and simulate such information as vortex, drag force coefficient, lift force coefficient, and pressure value. Then input the pressure values into the ANSYS to simulate modal analysis and transient analysis, to compute the data such as natural frequency and structure displacement respectively, and finally to estimate safety. In terms of the experiment, natural frequency and displacement are measured and compared with the simulation results.
Based on this process and method, a prediction for safety estimation of submerged pipelines can be made to reduce the difficulty of the experimental operation on the actual ocean current tapping pipelines.
| Identifer | oai:union.ndltd.org:TW/099NCKU5345002 |
| Date | January 2010 |
| Creators | jian-deLin, 林建德 |
| Contributors | ji-pi Too, 涂季平 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 83 |
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