Results - Initial Static Analysis
The initial static analysis in this example corresponds to stage number 1. Results for this analysis are presented in the four figures below. The parameters of interest are plotted against the curvilinear distance along the pipeline from the vessel connection point, ‘_TensionerVCP(1)’.
The effective tension distribution along the outer pipe is shown in the first figure. It is constant for the portion on the vessel deck, decreases in magnitude through the overbend and sagbend regions, and is constant again along the seabed. The magnitude at the tensioner is approximately 1675 kN.
The effective tension distribution along the inner pipe is shown in the second figure. Again, it is constant for the portion on the vessel deck, decreases in magnitude through the overbend and sagend regions, and is constant again along the seabed.. The maximum tension in the inner pipe is approximately 180 kN at the tensioner. The is tension transfer between the two pipe as indicated by the spikes in the two figures.
The bending moment distribution in the outer pipe is presented in the third figure. The most severe moments occur in the overbend region and touchdown zone. The maximum moment experienced is approximately 750 kNm in the overbend.
The bending moment distribution in the inner pipe is presented in the fourth figure. A similar trend to the outer pipe is exhibited, but the moment magnitudes are relatively small in comparison – the maximum moment experienced is just under 12 kNm in the overbend. There is sagging of the inner pipe between any two adjacent centralisers.
Effective Tension Distribution in Outer Pipe
Effective Tension Distribution in Inner Pipe
Bending Moment Distribution in Outer Pipe
Bending Moment Distribution in Inner Pipe