期刊名称：International Journal of Advances in Engineering and Management
电子版ISSN：2395-5252
出版年度：2022
卷号：4
期号：3
页码：1192-1205
DOI：10.35629/5252-04039981003
语种：English
出版社：IJAEM JOURNAL
摘要：The Reliability of a Jacket tubular joint is not only dependent on the values of the Hot Spot Stress, but also significantly influenced by the crack size in the jacket tubular. The determination of Reliability of the Jacket tubular is very important for improving the fatigue life of the structure and ensure safety of life and property on the offshore platform. In this research a stress number of cycle (S-N) method was used to carry out stress calculations and fatigue sensitive points on the KT- tubular joint. The Fracture Mechanics FM method was used for fatigue crack growth modelling. The probability of failure and Reliability of the Jacket tubular were estimated using the First Order Reliability Method (FORM) based on two case scenarios where crack size and Hot spot stresses were varied. It was seen that variation of crack size and Hot spot stress had an adverse effect on the reliability and probability of failure of the jacket tubular. The results of the Reliability in the two case scenarios were moderate. The analysis was carried out with MATLAB 2019 computer programming software. The fatigue analysis of the tubular jacket KT-joint using the S-N method was calibrated with the Fracture Mechanics (FM) method using FORM to estimate the probability of failure and reliability of the tubular jacket KT-joint. This shows that the reliability index decreased with increase in the probability of failure for the two cases and the probability of failure increased with increase in crack size for case 1 and increase in Hot spot stress for case 2.
