... Abstract This paper presents detailed learnings into the dissection of a flexible riser section, which had been operating for seven (7) years and subjected to high rates of fatigue damage, after operational field changes. Detailed global and local fatigue analyses were performed to assess...

... at the interface between the FPSO’s hull and those structures. The objective of the work presented in this paper is to assess the influence of these effects on the total fatigue damage. Numerical modelling of whipping is extremely complex from several aspects and only approximate models exist today...

... life extension machine learning fatigue damage subsea structure predictive maintenance schedule deep learning fe model neural network platform assessment ml model offshore structure API , Recommended Practice for Planning , Designing, and Constructing Fixed Offshore Platforms...

... load case characteristic angle stiffness curve fatigue damage upstream oil & gas angle value histogram slwr procedure stiffness offshore technology conference fatigue life flexible joint stiffness rigid riser plane refinement time trace riser configuration BEATTIE...

... the harsh conditions of Santos Basin may generate high fatigue damage at the riser TDZ (touchdown zone). In addition, extreme events may cause a significant compression load on the SCR, inducing global buckling in the same region and, thus, making the TDZ a region of special interest for the design...

.... Preliminary wave fatigue loading analyses are then performed for the most promising configurations. A Rainflow cycle counting method is used to compute the fatigue damage. Riser behaviour is highly influenced by the insulation applied. For FPSOs, it is found that uninsulated heavy walled SCRs are feasible...

.... A numerical example of a large diameter 20-in export riser is presented to demonstrate some of the challenging design issues in 750 ft. of water in the GOM environment. The fatigue damage resulting from both in-line and cross-flow VIV is estimated from the frequency and time domain responses. Among the key...

... flexible risers since the armour wires are more sensitive to fatigue damage. This is especially true in high stress concentration regions like the interior of the end fittings. The issues resulting from flexible riser connection failures and the consequence of fatigue failure in deepwater remote areas...