基于ANSYS系统的导管架平台疲劳可靠性研究

发布时间：2018-06-16 19:54

本文选题：ANSYS软件 + 导管架平台　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：石油、天然气资源在我国的能源结构中占据的比重较大,近年来,我国加大了海上油气资源的投资力度。作为开发海上石油的重要工具之一的导管架平台应用越来越广泛,因而对其结构的安全可靠性以及最佳的经济效益,在产品的设计、使用、检测以及维护等环节意志备受关注。现在,系统可靠性理论发展相对较为成熟,被广泛应用在各领域中。在疲劳的积累效应作用下导管架平台结构在使用过程中会由于损伤,导致可靠性能降低。因此,研究海上平台结构的疲劳可靠性问题具有重大的意义。本文根据渤海湾海域的环境条件,通过ANSYS有限元分析软件进行建模,通过数值模拟对导管架平台的疲劳寿命以及可靠度进行研究分析。本文通过建立平台结构的数值模型,分析模型的主要参数对结构的影响。并建立了桩-非线性模型,分析了桩的轴向和横向承载力对平台结构的影响。在以上研究的基础上,对平台结构的安全载荷进行了重点研究,分析了平台所受到的固定载荷、活载荷和环境载荷参数,为平台整体受到的工况进行了研究。此外,对平台的结构进行了静力评价和动力评价,并重点研究了船舶碰撞过程中的能量和受力分析,并进行了桩基的承载力评价。最后,对平台剩余寿命进行了评价,验证了管节点在疲劳载荷下的疲劳寿命满足了工程设计要求。
[Abstract]:Oil and natural gas resources occupy a large proportion in China's energy structure. In recent years, China has increased the investment of offshore oil and gas resources. As one of the important tools for offshore oil development, jacket platform is more and more widely used. Therefore, the safety and reliability of its structure and the best economic benefits are paid more and more attention to in the design, use, detection and maintenance of products. At present, the system reliability theory is relatively mature and widely used in various fields. Under the effect of fatigue accumulation, the reliability of jacket platform structure will be reduced due to damage. Therefore, it is of great significance to study the fatigue reliability of offshore platform structures. According to the environmental conditions of Bohai Bay, the finite element analysis software ANSYS is used to model the fatigue life and reliability of jacket platform. In this paper, the influence of the main parameters of the model on the structure is analyzed by establishing the numerical model of the platform structure. The pile-nonlinear model is established, and the influence of the axial and lateral bearing capacity of the pile on the platform structure is analyzed. On the basis of the above research, the safety load of the platform structure is studied, and the fixed load, live load and environment load parameters are analyzed. In addition, the static and dynamic evaluation of the structure of the platform is carried out, and the analysis of the energy and force during the collision process of the ship is emphasized, and the bearing capacity of the pile foundation is evaluated. Finally, the residual life of the platform is evaluated, and it is verified that the fatigue life of the pipe joints under fatigue load meets the engineering design requirements.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE95

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