Using simulation to assess the fatigue life of subsea jumpers ///

Structural vibrations of subsea piping systems stem from either external currents passing the structure (vortex-induced vibration, or VIV), or from transient flows of mixtures inside the pipes (flow-induced vibration, or FIV). These vibrations compromise the structural integrity of subsea systems and, in extreme circumstances, can reduce their fatigue lives from years to weeks. The transient multi-phase flow inside subsea piping is complex, and gaining insight through physical measurements is expensive and challenging. As a result, the industry has relied heavily on simple analysis methods to predict the effects of FIV. These approaches tend to be overly conservative, making the decision process, concerning structural integrity of subsea piping systems, difficult. This has had a significant economic impact on the oil and gas industry, as failure is not an option, and expensive over-design is common practice for reducing risk. In extreme cases, failure to quantify FIV problems accurately can lead to reduced production rates, costing hundreds of millions of dollars.

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