基于全尺寸疲劳试验的海洋柔性立管安全可靠性研究
发布时间：2019-01-12 10:12
【摘要】：海洋柔性立管是由多层高强度的金属层与聚合物层通过粘结或非粘结的方式组合而成。相对于传统金属管道而言，柔性立管具有易安装、易铺设、挠性大、抗腐蚀等优点，所以在近海石油开采中得到广泛使用，管道的安全可靠性不容忽视。为保持原油开采生产力和避免环境灾难的发生，对于深入了解在动载作用下柔性立管性能响应及量化整个结构破坏程度是十分必要的。本文基于立管全尺寸疲劳试验对海洋柔性管道安全可靠性进行研究，旨在通过柔性立管全尺寸疲劳试验量化管道所受风险因素的影响，从而制定管道风险控制措施、减少立管安全风险，增强管道的安全可靠性。 考虑到海洋环境的荷载对柔性立管的长期作用，海洋柔性立管的安全缺乏保障。本文通过对柔性立管疲劳试验研究与设计量化管道对实际海况的动态响应性能，对海洋柔性立管的疲劳损伤进行计算评估并进行疲劳寿命的预测。疲劳试验流程包括前期的特定海况数据的收集、根据海况数据试验工况的转化、立管疲劳试验、试验数据的分析、疲劳寿命计算与预测、改进措施、管道实际应用数据反馈。重点研究立管全尺寸疲劳试验的设计与研制、疲劳寿命计算方法并结合Ansys workbench数值模拟软件对立管主要受力层进行有限元分析计算；结合S-N曲线理论对立管疲劳寿命进行可靠性分析；在研究疲劳寿命的基础上制定海洋柔性立管安全可靠性评估流程并根据评估结果制定相应措施。
[Abstract]:The marine flexible riser is composed of multilayer high strength metal layer and polymer layer by bonding or non-bonding. Compared with the traditional metal pipeline, the flexible riser has the advantages of easy installation, easy laying, large flexibility and corrosion resistance, so it is widely used in offshore oil exploitation, and the safety and reliability of the pipeline can not be ignored. In order to maintain the productivity of crude oil production and avoid the occurrence of environmental disaster, it is necessary to understand the performance response of flexible riser under dynamic load and to quantify the damage degree of the whole structure. Based on the full-scale fatigue test of riser, the safety and reliability of marine flexible pipeline are studied in this paper. The purpose of this paper is to quantify the influence of risk factors on pipeline through full-scale fatigue test of flexible riser, so as to formulate pipeline risk control measures. Reduce riser safety risk and enhance pipeline safety reliability. Considering the long-term effect of marine environment load on flexible riser, the safety of marine flexible riser is not guaranteed. In this paper, the fatigue damage of the flexible riser is calculated and evaluated and the fatigue life is predicted by quantifying the dynamic response of the pipeline to the actual sea condition through the fatigue test and design of the flexible riser. The fatigue test process includes the collection of pre-specific sea condition data, the transformation of the test condition according to the sea condition data, the fatigue test of riser, the analysis of test data, the calculation and prediction of fatigue life, the improvement measures and the feedback of practical application data of pipeline. The design and development of full-scale fatigue test of riser are studied emphatically. The fatigue life calculation method and the finite element analysis and calculation of the main bearing layer of riser are carried out with Ansys workbench numerical simulation software. Combined with S-N curve theory, the reliability analysis of pipe fatigue life is carried out, and based on the study of fatigue life, the safety and reliability evaluation process of marine flexible riser is established and corresponding measures are made according to the evaluation results.
【学位授予单位】：中国海洋大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P756.2
本文编号：2407662
[Abstract]:The marine flexible riser is composed of multilayer high strength metal layer and polymer layer by bonding or non-bonding. Compared with the traditional metal pipeline, the flexible riser has the advantages of easy installation, easy laying, large flexibility and corrosion resistance, so it is widely used in offshore oil exploitation, and the safety and reliability of the pipeline can not be ignored. In order to maintain the productivity of crude oil production and avoid the occurrence of environmental disaster, it is necessary to understand the performance response of flexible riser under dynamic load and to quantify the damage degree of the whole structure. Based on the full-scale fatigue test of riser, the safety and reliability of marine flexible pipeline are studied in this paper. The purpose of this paper is to quantify the influence of risk factors on pipeline through full-scale fatigue test of flexible riser, so as to formulate pipeline risk control measures. Reduce riser safety risk and enhance pipeline safety reliability. Considering the long-term effect of marine environment load on flexible riser, the safety of marine flexible riser is not guaranteed. In this paper, the fatigue damage of the flexible riser is calculated and evaluated and the fatigue life is predicted by quantifying the dynamic response of the pipeline to the actual sea condition through the fatigue test and design of the flexible riser. The fatigue test process includes the collection of pre-specific sea condition data, the transformation of the test condition according to the sea condition data, the fatigue test of riser, the analysis of test data, the calculation and prediction of fatigue life, the improvement measures and the feedback of practical application data of pipeline. The design and development of full-scale fatigue test of riser are studied emphatically. The fatigue life calculation method and the finite element analysis and calculation of the main bearing layer of riser are carried out with Ansys workbench numerical simulation software. Combined with S-N curve theory, the reliability analysis of pipe fatigue life is carried out, and based on the study of fatigue life, the safety and reliability evaluation process of marine flexible riser is established and corresponding measures are made according to the evaluation results.
【学位授予单位】：中国海洋大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P756.2
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