Sub-sea 트리 튜빙 행어(tubing hanger)의 구조 신뢰성 해석
Structural Reliability Analysis of Subsea Tree Tubing Hanger
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초록
As subsea production has been revㅑved up, the demand of subsea equipment has also been increased. Among the equipment,subsea tree plays a major role in safety. The tubing hanger is one of the most important components in subsea tree. In this studystructural reliability analysis on dual bore tubing hanger of subsea tree is performed. The target reliability which is introduced in ISOregulation is used for judging whether tubing hanger is safe or not. The considered loads are working pressure, working temperatureand suspended tubing weight. Thermal-stress analysis on tubing hanger is performed and kriging model is created based on theresults of FEM analysis. According to von Mises criterion, limit state equation can be estimated. Reliability analysis is performed byusing level 2 method and the result is verified by that of Monte Carlo Simulation. For finding most probable failure point, enhancedHL-RF method is adopted. Because the reliability of model doesn’t reach target reliability, an improvement measure should beconsidered. Thus, it is suggested to change the material of tubing hanger main body to AISI 4140.
Abstract
As subsea production has been revㅑved up, the demand of subsea equipment has also been increased. Among the equipment,subsea tree plays a major role in safety. The tubing hanger is one of the most important components in subsea tree. In this studystructural reliability analysis on dual bore tubing hanger of subsea tree is performed. The target reliability which is introduced in ISOregulation is used for judging whether tubing hanger is safe or not. The considered loads are working pressure, working temperatureand suspended tubing weight. Thermal-stress analysis on tubing hanger is performed and kriging model is created based on theresults of FEM analysis. According to von Mises criterion, limit state equation can be estimated. Reliability analysis is performed byusing level 2 method and the result is verified by that of Monte Carlo Simulation. For finding most probable failure point, enhancedHL-RF method is adopted. Because the reliability of model doesn’t reach target reliability, an improvement measure should beconsidered. Thus, it is suggested to change the material of tubing hanger main body to AISI 4140.
참고문헌 (8)
- Bai, Y, "Subsea Engineering Handbook" (2010), Elsevier
- Keshtegar, B, "An Enhanced HL-RF Method for the Computation of Structural Failure Probability Based On Relaxed Approach", Civil Engineering Infrastructures Journal, 1(1), pp.69~80 (2012)
- International Organization for Standardization, "Design and Operation of Subsea Production Systems — Part 4: Subsea Wellhead and Tree Equipment", ISO, ~ (2010)
- International Organization for Standardization, "Drilling and Production Equipment —Wellhead and Christmas Tree Equipment", ISO, ~ (2003)
- International Organization for Standardization, "Specification for Casing and Tubing", ISO, ~ (2010)
- International Organization for Standardization, "General Principles on Reliability for Structures", ISO, ~ (2012)
- Timothy, W.S, "Kriging Models for Global Approximation in Simulation-Based Multidisciplinary Design Optimization", The American Institute of Aeronautics and Astronautics Jounal, 39(12), pp.2233~2241 (2001)
- Wang, C, "Reliability Analysis on Subsea X-tree Tubing Hanger", International Journal of Energy Engineering, 2, pp.51~56 (2012)