How to Import a Sacs Model into GeniE

Ole Jan Nekstad

15 March 2012

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How to import a Sacs model into GeniE

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SesamTM

15 March 2012

Importing a Sacs model into GeniE

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General about the Sacs GeniE data translation

What can be automatically imported

What must be manually modified

How to verify that the GeniE model is the same as the Sacs model

How to run linear analysis of the imported model

How to look at results of the imported model

What purposes can the imported model serve

Use GeniE version 6.2 or later


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15 March 2012

Capabilities and Limitations

Listed in separate document

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SacsToFem.pdf


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15 March 2012

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Automatic import


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15 March 2012

How to import a model from Sacs

The procedure today

- Import structure (automatic)

- Import wave load data (automatic)

- Import load combinations (automatic)

- Add soil data, blanket and wind loads

- Verify model with previous reports or model data

- Run a linear static analysis and verify selected key results (displacements, forces and

stresses)

You can do it

- Without training or assistance

- By reading our tutorial

- Learning from a course where the goal is to import 3 structures

- We can do it as a consulting service to you

Once the model is verified it can be used for all purposes in Sesam

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15 March 2012

Import structure, loads, wave data and load combinations

Remember to specify database units before importing

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Decide how to import

Normally use the following settings if there is wave data. For topsides ignore «import

wave load data»

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15 March 2012

Joint and beam numbers - 1

The imported model has the same number as the Sacs model

For the purpose of change capacity and making a true GeniE model you should

change the mesh settings to «always regenerate mesh»

When you make a new analysis the finite element

numbers will change

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15 March 2012

Joint and beam numbers - 2

If you want to keep the same finite element numbers for existing structure

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15 March 2012

Analysis, loads and wave loads

Analysis set-up, loads, wave loads and load combinations are part of the Activity

If all data has been correctly

imported you can run analysis

and look at results

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How do you know that all has been imported correctly?


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15 March 2012

Check the log file after import

The log file is located in the workspace

- Data not converted is listed in the beginning of log file

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15 March 2012

Check the quality of the model

The verify feature can detect problems and help you understand the model

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Compare GeniE model with Sacs model

Graphical visualisation and easy to query object properties

- Structure – model, point masse and sets

- Total mass and centre of gravity

- Properties – sections, materials & hydro-coefficients

- Local co-ordinate systems – beams and plates

- Loads – both manually applied and waves

- Load combinations – loads and scaling factors

- Soil layers

- Displacements, stresses, forces, deflections for single load-case(s) or envelope

From reports

- All above

- Maximum wave shear and overturning moment

- Load sums and reaction forces

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15 March 2012

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Which purposes can an imported Sacs model serve once it is inside


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15 March 2012

Our tools – your solutions – your decisions

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Linear analysis (wave, pile/soil)

Deflections, Stresses,

Code-check, Fatigue, Earthquake

Transportation, lifting


Code-check, Fatigue

Transportation, launching


Code-check, Fatigue

Non-linear analysis,

collapse, accidents,

re-qualifications

../../../../DNV/Workspaces/GeniE_D6100_Rev1/KE_Sacs/Analysis3/Usfos_view.vtf


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Benefits by using Sesam for jackets

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Collapse analysis

Requalification

Extreme conditions,

accidents, fire, explosion

New builds covering

entire life cycle

MTO, deflection check,

code check, fatigue

Same model for all stages – can be shared with others for collaboration

Manage existing

re-analysis models

Understand models over time,

produce and view results

Modification work

- all phases

Design of new parts

Re-design of existing


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15 March 2012

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and the environment

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How to Import a Sacs Model into GeniE