多因素诱发海底管道轴向定向位移量计算方法
发布时间：2018-12-25 14:51
【摘要】：深水管道的启闭作业造成了管道内部温度与压力的往复施加,导致管道产生沿轴向的定向位移("walking"现象),成为油气输送系统安全的重大隐患,准确预测管道的轴向定向位移量是提出防控措施的关键。首先阐明当管道受到来自悬链线立管(SCR)张力、海床倾角以及内部瞬态热梯度作用时产生轴向定向位移的机理;建立单因素与多因素诱发管道轴向定向位移的数值模拟方法,揭示管道轴向定向位移量与不同诱因之间的非线性对应关系;修正单因素诱发管道轴向定向位移量的计算公式,提出了多因素耦合作用下确定管道轴向定向位移量的方法。
[Abstract]:The opening and closing operation of deep water pipeline causes the reciprocating application of temperature and pressure inside the pipeline, resulting in the directional displacement ("walking" phenomenon) along the axis of the pipeline, which becomes a major hidden danger to the safety of oil and gas transportation system. Accurate prediction of the axial displacement is the key to the prevention and control measures. Firstly, the mechanism of axial directional displacement is explained when the pipe is subjected to (SCR) tension from catenary riser, seabed inclination and internal transient thermal gradient. A numerical simulation method of the axial directional displacement induced by single factor and multiple factors is established to reveal the nonlinear correspondence between the axial displacement and different inducements. The formula for calculating the axial directional displacement of pipeline induced by single factor is modified, and the method of determining the axial directional displacement of pipeline under the action of multi-factor coupling is put forward.
【作者单位】： 天津大学水利工程仿真与安全国家重点试验室;
【基金】：国家重点基础研究发展计划(973计划)项目(2014CB046802) 国家自然科学基金(51679162)
【分类号】：P756.2;TE973
，
本文编号：2391276
[Abstract]:The opening and closing operation of deep water pipeline causes the reciprocating application of temperature and pressure inside the pipeline, resulting in the directional displacement ("walking" phenomenon) along the axis of the pipeline, which becomes a major hidden danger to the safety of oil and gas transportation system. Accurate prediction of the axial displacement is the key to the prevention and control measures. Firstly, the mechanism of axial directional displacement is explained when the pipe is subjected to (SCR) tension from catenary riser, seabed inclination and internal transient thermal gradient. A numerical simulation method of the axial directional displacement induced by single factor and multiple factors is established to reveal the nonlinear correspondence between the axial displacement and different inducements. The formula for calculating the axial directional displacement of pipeline induced by single factor is modified, and the method of determining the axial directional displacement of pipeline under the action of multi-factor coupling is put forward.
【作者单位】： 天津大学水利工程仿真与安全国家重点试验室;
【基金】：国家重点基础研究发展计划(973计划)项目(2014CB046802) 国家自然科学基金(51679162)
【分类号】：P756.2;TE973
，
本文编号：2391276
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