Fatigue - Staged Operations - Outputs

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Fatigue - Staged Operations - Outputs

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The outputs from a Staged Operations fatigue analysis are as follows:

Fatigue Damage. A plot of the fatigue damage as a function of distance from the Common Reference Point.

Standby Time. The maximum time the suspended pipe can be held stationary in any given stage.

Vessel Welds and TDP. For each stage, the fatigue damage rate and the maximum fatigue damage occurring in a single pull at each of the vessel weld locations and the touchdown point.

Maximum Nodal Fatigue Damage Rate. The maximum fatigue damage rate for all nodes along the pipeline during a particular stage.

Plot of Variation of Damage Rate along Pipe. Nine plots are generated in total for any given stage - one plot for each of eight points on the pipeline circumference, and a ninth plot showing the maximum of all eight values at each node.

Plot of Maximum Rate of Change in Restoring Force Statistics. For every stage, six graphs are presented on a single plot; one each for the mean and standard deviation of axial force, y-bending moment and z-bending moment. There are additional optional outputs if you set Generate Histogram Output to Yes; they are as follows:

Fatigue_hist.csv. Contains the stress histogram data for 8 circumferential points for each node. This can be viewed by clicking the Open Histogram Output button on the Results tab.

Accumulated Tracked Weld Stress Histogram Data. This is the governing accumulated weld stress histogram data for all tracked welds. This data can be viewed in the fatigue.out file.

Plots of Accumulated Tracked Weld Stress Histograms. A governing stress histogram plot is produced for all tracked welds.