基于海底管道路由调查的管道耐久性研究
发布时间：2019-01-02 08:46
【摘要】：随着海洋经济、港口经济的持续发展,海底管道在不同行业中广泛使用,例如沿海港口污水排放,海洋石油行业的油气输送等,为了确保海底管道在使用过程中能够长期稳定的使用,耐久性研究就彰显出其重要性。除了管道自身在结构、强度等方面需要满足设计要求之外,外部环境对海底管道耐久性的影响也十分重要。因此,本文从管道路由区域的海洋勘察入手,分析海底条件对所铺设管道耐久性的影响,同时对特定海底条件下最常见的两种管道失效形式进行深入研究,提出提高管道耐久性的合理措施。具体研究内容如下:(1)以作者曾参与的某管道路由调查项目为例,介绍路由区域海洋勘察实施手段,并结合勘察结果,分析路由区域的地质灾害状况、泥沙运动和冲淤趋势、以及路由区域腐蚀性环境,研究路由区域的海底条件对所铺设管道耐久性产生的影响。(2)对两种最常见海底管道失效形式进行深入研究,包括腐蚀失效和由于管道悬跨引起的疲劳失效。分析海底管道腐蚀的机理和成因,针对不同原因造成的管道腐蚀和不同的防腐措施进行深入探讨;对涡激振动产生的机理和悬跨管道的进行疲劳分析,基于DNV OS F101方法,对涡激振动下悬跨管道的临界跨长和剩余寿命进行研究,并讨论不同原因海底管道悬跨失效的预防和应对措施。
[Abstract]:With the continuous development of marine economy and port economy, submarine pipelines are widely used in different industries, such as sewage discharge from coastal ports, oil and gas transportation in offshore oil industry, etc. In order to ensure that submarine pipeline can be used steadily for a long time, durability research shows its importance. In addition to the structural and strength requirements of the pipeline itself, the influence of the external environment on the durability of the submarine pipeline is also very important. Therefore, starting with the marine survey of pipeline routing area, this paper analyzes the influence of submarine conditions on the durability of the pipeline laid, and makes a thorough study of the two most common pipeline failure forms under specific submarine conditions. The reasonable measures to improve the durability of pipeline are put forward. The specific research contents are as follows: (1) taking a pipeline route survey project in which the author has participated as an example, this paper introduces the implementation means of marine survey in the routing area, and analyzes the geological hazard situation of the routing area by combining the results of the survey. The trend of sediment movement and erosion and deposition, as well as the corrosive environment of the routing area, are studied to study the influence of the submarine condition of the routing area on the durability of the pipeline laid. (2) the two most common failure modes of submarine pipeline are studied in depth. It includes corrosion failure and fatigue failure caused by pipeline suspension. The mechanism and cause of submarine pipeline corrosion are analyzed, and the pipeline corrosion caused by different reasons and different anticorrosion measures are discussed. Based on DNV OS F101 method, the critical span length and residual life of suspended span pipeline under vortex-induced vibration are studied. The prevention and countermeasures of overhanging span failure of submarine pipeline with different causes are also discussed.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P756.2
本文编号：2398280
[Abstract]:With the continuous development of marine economy and port economy, submarine pipelines are widely used in different industries, such as sewage discharge from coastal ports, oil and gas transportation in offshore oil industry, etc. In order to ensure that submarine pipeline can be used steadily for a long time, durability research shows its importance. In addition to the structural and strength requirements of the pipeline itself, the influence of the external environment on the durability of the submarine pipeline is also very important. Therefore, starting with the marine survey of pipeline routing area, this paper analyzes the influence of submarine conditions on the durability of the pipeline laid, and makes a thorough study of the two most common pipeline failure forms under specific submarine conditions. The reasonable measures to improve the durability of pipeline are put forward. The specific research contents are as follows: (1) taking a pipeline route survey project in which the author has participated as an example, this paper introduces the implementation means of marine survey in the routing area, and analyzes the geological hazard situation of the routing area by combining the results of the survey. The trend of sediment movement and erosion and deposition, as well as the corrosive environment of the routing area, are studied to study the influence of the submarine condition of the routing area on the durability of the pipeline laid. (2) the two most common failure modes of submarine pipeline are studied in depth. It includes corrosion failure and fatigue failure caused by pipeline suspension. The mechanism and cause of submarine pipeline corrosion are analyzed, and the pipeline corrosion caused by different reasons and different anticorrosion measures are discussed. Based on DNV OS F101 method, the critical span length and residual life of suspended span pipeline under vortex-induced vibration are studied. The prevention and countermeasures of overhanging span failure of submarine pipeline with different causes are also discussed.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P756.2
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