Note
This example is simplified in PipeLay Starter Edition where there is no bending strain or tip separation criteria available. If you are using Starter Edition then you should ignore certain aspects of this article, in particular parts of the ‘Results’ section.
Example 3 simulates an abandonment scenario. The example considers the lowering of a pipeline to the seabed from a lay vessel via a winch cable. The lay vessel is equipped with an S-Lay stinger fitted with V-shaped rollerboxes. The pipe is restrained by a tensioner on the vessel deck. The analysis procedure is performed as a series of 15 static installation stages where the winch cable is paid-out in finite increments while the vessel simultaneously surges forward. A maximum bending strain of 0.242 % in the pipe section and a maximum tip separation of 0.9 m are used as the installation criteria for all 15 stages. The two figures below illustrate the abandonment process. The first figure shows the initial configuration while the second shows the final configuration. This example is the reverse procedure to the recovery scenario modelled in Example 4.
Initial Configuration
Final Configuration
The input files for this example may be found in the directory ‘Example 03 – Abandonment’, which is located in the Examples subdirectory of your PipeLay installation directory. The input files are as follows:
Example 3 – Abandonment.ppd |
PipeLay project file |
plot_collator.pyw |