Model - Adding Additional Components

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Model - Adding Additional Components

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Pipe Sections and Cables

To add a pipe section, you click on the Pipe Sections folder in the sub-component list and then click on Add, or else double-click on the Pipe Sections folder. This opens the Pipe Section - Add menu. Adding a pipe section to a model is similar to adding a line, with two main differences. Firstly, when you define a line, the overall length of the line is known because you must specify the individual lengths of the sub-components you include in the line definition; so you don’t specify a length when adding a line to a model. However, this is not true for a Pipe Section component; you don’t input a length when you define a section, so you must specify a length when adding that section to a model. Secondly, with a pipe section you do not have an option to specify sagbend or overbend parameters as you do with a line.

To add a cable, you click on the Cables folder in the sub-component list and then click on Add, or else double-click on the Cables folder. This opens the Cable - Add menu. Adding a Cable component is almost identical to adding a Pipe Section component, but in the cable case you do not have the option of specifying an internal fluid.

 

Sheaves

Note

The Sheave component is not available in PipeLay Starter Edition

To add a sheave, you click on the Sheaves folder in the sub-component list and then click on Add, or else double-click on the Sheaves folder. This opens the Sheave - Add menu. To add the sheave, you select the required Sheave component from a list of all those currently defined in the project. Once you select the required sheave, a default name is associated with it, but you may change this name if you wish. The X, Y and Z coordinates are used to define the location of the sheave, which is fixed by applied boundary conditions. In the model, the sheave appears like another connection point – you can connect up lines to it as you would do with connections. The only difference is that you must designate a main line and a return cable in the model when you include a sheave. PipeLay actually creates two coincident connection points for each sheave – one for the main line and one for the return cable. The figure below show the model properties of a pipeline and cable both attached to the same sheave, the pipeline to the main connection and the cable to the return connection via the Line & Cable properties dialogs.

line_properties_sheave

cable_properties_sheave

Pipeline and Cable Attached to Sheave

 

The figure below shows the same model as above in full.

Sample Model with Sheave

Sample Model with Sheave

 

Buoys

To add a buoy, you click on the Buoys folder in the sub-component list and then click on Add, or else double-click on the Buoys folder. This opens the Buoy - Add menu. Adding the buoy involves selecting the relevant Buoy component and optionally modifying the automatically assigned unique name. Unlike other components, you do not need to specify the location of the buoy. The model will calculate a position for the buoy based on the components attached to it. This location is approximate in the sense that the position of the buoy after a converged static solution has been obtained may be different to that shown in the Model component. The figure shows a sample model with a buoy attached to the main line via a cable.

 

Sample Model with Buoy

Sample Model with Buoy