Introduction & Example Files

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Introduction & Example Files

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Introduction

Note

This example is simplified in PipeLay Starter Edition where there is no seabed contact criterion available. If you are using Starter Edition then you should ignore certain aspects of these articles, in particular parts of the ‘Results’ section.

 

Example 12 simulates a DMA start-up scenario. It considers a pipeline initiation to the seabed via a cable that runs from the lay vessel down to an anchor on the seabed. The lay vessel is equipped with an S-Lay stinger fitted with V-shaped roller boxes. The pipe is restrained on the vessel deck by a tensioner. The analysis procedure is performed as a series of thirteen static installation stages in which the pipe is paid-out incrementally as the vessel surges forward. The final stage corresponds to the point at which the pipe end just comes into contact with the seabed. A cable tension of between 300 kN and 301 kN is maintained at the anchor throughout the start-up procedure. The two figures below illustrate the start-up process. The first figure shows the initial configuration while the second shows the final configuration.

Initial Configuration

Initial Configuration

Final Configuration

Final Configuration

 

Example Files

The input file for this example may be found in the directory ‘Example 12 – DMA Start-up’, which is located in the Examples subdirectory of your PipeLay installation directory. The file is as follows:

Example 12 – DMA Start-up.ppd                

PipeLay project file

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