How to Import a Sacs Model into GeniE

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Presentation by Pal Dahlberg on Seminar Design of Fixed Structures with DNV Software (April 2012)

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How to Import a Sacs Model into GeniE

  1. 1. STRENGTH AT SEA INTEGRITY MANAGEMENT RISK AND RELIABILITYSesamTM40 years of successHow to import a Sacs model into GeniEOle Jan Nekstad15 March 2012
  2. 2. Importing a Sacs model into GeniE  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 laterSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 2
  3. 3. Capabilities and Limitations  Listed in separate documentSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 3
  4. 4. Automatic importSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 4
  5. 5. 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 SesamSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 5
  6. 6. Import structure, loads, wave data and load combinations  Remember to specify database units before importingSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 6
  7. 7. Decide how to import  Normally use the following settings if there is wave data. For topsides ignore «import wave load data»SesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 7
  8. 8. 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 changeSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 8
  9. 9. Joint and beam numbers - 2  If you want to keep the same finite element numbers for existing structureSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 9
  10. 10. 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 resultsSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 10
  11. 11. How do you know that all has been imported correctly?SesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 11
  12. 12. Check the log file after import  The log file is located in the workspace - Data not converted is listed in the beginning of log fileSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 12
  13. 13. Check the quality of the model  The verify feature can detect problems and help you understand the modelSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 13
  14. 14. 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 forcesSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 14
  15. 15. Which purposes can an imported Sacs model serve once it is insideSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 15
  16. 16. Our tools – your solutions – your decisions Transportation, launching Transportation, lifting Deflections, Stresses, Deflections, Stresses, Code-check, Fatigue Code-check, Fatigue Non-linear analysis, Linear analysis (wave, pile/soil) collapse, accidents, Deflections, Stresses, re-qualifications Code-check, Fatigue, EarthquakeSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 16
  17. 17. Benefits by using Sesam for jacketsNew builds covering Manage existing Collapse analysis Modification work entire life cycle re-analysis models Requalification - all phasesMTO, deflection check, Understand models over time, Extreme conditions, Design of new parts code check, fatigue produce and view results accidents, fire, explosion Re-design of existing Same model for all stages – can be shared with others for collaborationSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 17
  18. 18. Safeguarding life, property and the environment www.dnv.comSesamTM15 March 2012© Det Norske Veritas AS. All rights reserved. 18

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