Introduction & Example Files

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Introduction & Example Files

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This example is simplified in PipeLay Starter Edition where there is no departure angle criterion available and fatigue analysis is not possible. If you are using Starter Edition then you should ignore certain aspects of this article, in particular parts of the ‘Results’ section.


Example 2 simulates a normal J-lay installation scenario. The J-Lay model includes a lay vessel with a J-Lay tower. The pipeline runs from a tensioner at the top of the tower, through O-shaped rollerboxes of increasing diameter and down onto the seabed. Static, dynamic and fatigue analyses are performed on the configuration. In the static analysis, a desirable static configuration is obtained based on an optimum value for the pipeline departure angle. Two dynamic restart analyses are included to subject the J-Lay configuration to regular wave and random sea loadings. The fatigue analysis is carried out as a postprocessing operation after the random sea analysis has completed. The figure below illustrates the static configuration.

Static Configuration  

Static Configuration  


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Example Files

The input files for this example may be found in the directory ‘Example 02 – Normal J-Lay’, which is located in the Examples subdirectory of your PipeLay installation directory. The input files are as follows:

Example 2 – Normal J-Lay .ppd

PipeLay project file

Lay Vessel.rao

Vessel RAO file

Lay Vessel.ves        

Vessel profile file

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