Ole Jan Nekstad 15 March 2012 STRENGTH AT SEA INTEGRITY MANAGEMENT RISK AND RELIABILITY Sesam TM 40 years of success How to import a Sacs model into GeniE
Jan 18, 2015
Ole Jan Nekstad
15 March 2012
STRENGTH AT SEA INTEGRITY MANAGEMENT RISK AND RELIABILITY
SesamTM 40 years of success
How to import a Sacs model into GeniE
© Det Norske Veritas AS. All rights reserved.
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
© Det Norske Veritas AS. All rights reserved.
SesamTM
15 March 2012
Capabilities and Limitations
Listed in separate document
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© Det Norske Veritas AS. All rights reserved.
SesamTM
15 March 2012
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Automatic import
© Det Norske Veritas AS. All rights reserved.
SesamTM
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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© Det Norske Veritas AS. All rights reserved.
SesamTM
15 March 2012
Import structure, loads, wave data and load combinations
Remember to specify database units before importing
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© Det Norske Veritas AS. All rights reserved.
SesamTM
15 March 2012
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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© Det Norske Veritas AS. All rights reserved.
SesamTM
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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© Det Norske Veritas AS. All rights reserved.
SesamTM
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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© Det Norske Veritas AS. All rights reserved.
SesamTM
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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© Det Norske Veritas AS. All rights reserved.
SesamTM
15 March 2012
11
How do you know that all has been imported correctly?
© Det Norske Veritas AS. All rights reserved.
SesamTM
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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© Det Norske Veritas AS. All rights reserved.
SesamTM
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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© Det Norske Veritas AS. All rights reserved.
SesamTM
15 March 2012
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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© Det Norske Veritas AS. All rights reserved.
SesamTM
15 March 2012
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Which purposes can an imported Sacs model serve once it is inside
© Det Norske Veritas AS. All rights reserved.
SesamTM
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
Deflections, Stresses,
Code-check, Fatigue
Transportation, launching
Deflections, Stresses,
Code-check, Fatigue
Non-linear analysis,
collapse, accidents,
re-qualifications
© Det Norske Veritas AS. All rights reserved.
SesamTM
15 March 2012
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
© Det Norske Veritas AS. All rights reserved.
SesamTM
15 March 2012
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Safeguarding life, property
and the environment
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