STRENGTH AT SEA
INTEGRITY MANAGEMENT
SesamTM 40 years of success How to import a Sacs model into GeniE Ole Jan Nekstad
RISK AND RELIABILITY
Importing a Sacs model into GeniE
General about the Sacs
What can be automatically au tomatically 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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GeniE data translation
Capabilities and Limitations
Listed in separate document
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Automatic import
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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, (displac ements, 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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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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Joint and beam numbers - 1
The imported model has the same number as the Sacs model m odel
For the purpose of change capacity and making a true GeniE model you should shoul d change the mesh settings to «always regenerate mesh»
When you make a new analysis the finite element numbers will change
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Joint and beam numbers - 2
If you want to keep the same finite element numbers for existing structure
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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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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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Check the quality of the model
The verify feature can detect problems and help h elp 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 & hydrocoefficients - 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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Which purposes can an imported Sacs model serve once it is inside
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Our tools – your solutions – your decisions
Transportation, launching Deflections, Stresses, Code-check, Fatigue
Non-linear analysis, collapse, accidents, re-qualifications SesamTM 15 March 2012
Transportation, lifting Deflections, Stresses, Code-check, Fatigue
Linear analysis (wave, pile/soil) Deflections, Stresses, Code-check, Fatigue, Earthquake
Benefits by using Sesam for jackets New builds covering Manage existing entire life cycle re-analysis models
MTO, deflection check, code check, fatigue
Collapse analysis Requalification
Understand models over time, Extreme conditions, produce and view results accidents, fire, explosion
Modification work - all phases
Design of new parts Re-design of existing
Same model for all stages – can be shared with others for collaboration SesamTM 15 March 2012
Safeguarding life, property and the environment www.dnv.com
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