碩士 / 大葉大學 / 機械工程研究所碩士班 / 97 / In many engineering situation concerning off shore structures of a great importance (pipelines, underwater tunnel crossings in oil industry), their resistance against the load produced by underwater explosions is an important component of the entire structure’s safety. This thesis is related to the analyses of an underwater pipeline protected by an external covered concrete subjected to an explosion close to the external protective structure.
At first, the nonlinear dynamic response of a cylinder subjected to a side-on, far-field underwater explosion was studied using the finite-element computer code ABAQUS/USA in this paper. This study showed the numerical results compared with Kwon et al. [13] experimental data. And then, this paper studied the safety assessment of submerged pipelines, exposed to underwater shock. Four cases of pipeline configurations developed by Gong et al. [16] were modeled and simulated. The first case is a submerged empty pipeline without any cover, the second case is a submerged empty pipeline with concrete cover, the third case is an empty pipeline buried in sand and the fouth case deals with a fluid-filled pipeline buried in sand. The numerical results obtained for four pipeline configuration were compared and discussed in order to find the best protection.
| Identifer | oai:union.ndltd.org:TW/097DYU00488001 |
| Date | January 2009 |
| Creators | Zhi Rong Zhang, 張智榮 |
| Contributors | Cho Chung Liang, 梁卓中 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 74 |
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