Analyses |
 
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Analyses |
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The lower end of the pipeline is fixed in all translational degrees of freedom, and the fixed end of the tensioner element is connected to the vessel.
In order to initiate contact between the pipeline and stinger, some additional constraints are applied to the ends of each stinger section. This allows the pipeline to be supported by the stinger, but the stinger is artificially restrained rigidly to the vessel for the time being.
The pipeline is also temporarily connected rigidly to the vessel, thereby rendering the tensioner element provisionally redundant.
In obtain a static equilibrium configuration of the pipeline and stinger, the temporary constraints on the stinger are removed. This allows the stinger to find an equilibrium position under the influence of gravity and buoyancy loading.
The additional constraints temporarily applied to the tensioner element are removed. This allows the pipeline to move in the axial direction subject to the constant restoring force provided by the tensioner element.
The boundary conditions remain unchanged and are carried through automatically from the preceding analysis. A sample regular wave loading is applied, of 2m amplitude and 10s period. The incident wave heading is applied at 90°, simulating a beam sea condition.