Analysis Component

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Analysis Component

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The Analysis component is used to specify the various inputs for a PipeLay analysis. The Analysis component allows you to gather together a set of components of various types, such as pipelines, vessels, waves and so on, from all of those defined in a project file, and to perform various types of analyses using these components. In this example, the Analysis component is named ‘Abandonment Analysis’. The following sections provide a description of the various inputs for the analysis.

 

Properties Tab

The Properties tab allows you to specify the options that are to be applied to all analysis stages of a particular model. In this example the Model is selected as ‘Model’ and the Contact Modelling option is defined as Simple.

 

Installation Stages Tab

The Installation Stages tab is where you define the various stages in your analysis. In this example, there are 15 static installation stages.

 

Parameters Tab

The Parameters tab allows you to specify which parameters you want to change during each analysis stage defined on the Installation Stages tab. A summary of the parameters changed in each stage of this example is provided in the table below.

Table: Summary of Parameter Changes

Stage Number

Parameter

Value

2

Length of Pipeline(1)_Winch Cable(1)

50 m

2

50m Offset

Add

3

Length of Pipeline(1)_Winch Cable(1)

100 m

3

50m Offset

Add

4

Length of Pipeline(1)_Winch Cable(1)

150 m

4

50m Offset

Add

5

Length of Pipeline(1)_Winch Cable(1)

200 m

5

50m Offset

Add

6

Length of Pipeline(1)_Winch Cable(1)

250 m

6

50m Offset

Add

7

Length of Pipeline(1)_Winch Cable(1)

300 m

7

50m Offset

Add

8

Length of Pipeline(1)_Winch Cable(1)

350 m

8

50m Offset

Add

9

Length of Pipeline(1)_Winch Cable(1)

400 m

9

50m Offset

Add

10

Length of Pipeline(1)_Winch Cable(1)

450 m

10

50m Offset

Add

11

Length of Pipeline(1)_Winch Cable(1)

500 m

11

50m Offset

Add

12

Length of Pipeline(1)_Winch Cable(1)

550 m

12

50m Offset

Add

13

Length of Pipeline(1)_Winch Cable(1)

600 m

13

50m Offset

Add

14

Length of Pipeline(1)_Winch Cable(1)

650 m

14

50m Offset

Add

15

Length of Pipeline(1)_Winch Cable(1)

700 m

15

50m Offset

Add

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Criteria Tab

On the Criteria tab, you can specify installation criteria for each installation stage that is created in the Installation Stages tab. In this example, the same criteria are specified for each stage, as detailed in the tables below for bending strain and tip separation, respectively. The tolerance parameters are set to their defaults.

Table: Bending Strain Criteria Properties

Property

Value

Criteria

Bending Strain

Component Name

Pipeline(1)

Location

Sagbend

Minimum Value

0.0 %

Maximum Value

0.242 %

Iterate On - Type

Seabed Connection Point

Iterate On - Name

Seabed Connection

Iterate On - Vector

Global Y

 

Table: Tip Separation Criteria Properties

Property

Value

Criteria

Tip Separation

Component Name

Lay Vessel(1)

Minimum Value

0.8 m

Maximum Value

0.9 m

Iterate On - Type

Seabed Connection Point

Iterate On - Name

Seabed Connection

Iterate On - Vector

Global Y

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Summary Postprocessing Tab

You can use the Summary Postprocessing tab to request output from various parameters at crucial locations throughout the installation process. In this example, a number of parameters are selected for summary postprocessing, as detailed in the table below.

Table: Summary Postprocessing

Type

Component

Parameter

Criteria

Pipeline(1)_16’’ Pipe(1)

Bending Strain

Criteria

Lay Vessel(1)

Tip Separation

Advanced

Pipeline(1)

Layback

Criteria

Pipeline(1)_16’’ Inch Pipe(1)

Tension - Start

Criteria

Pipeline(1)_Pullhead(1)

Component Height

 

Running the Analysis

You are now ready to run the analysis. While the analysis is running, you can observe the analysis progress and check for warnings or errors on the Progress tab.

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