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Sesam Capabilities for Transportation & Installation Analysis

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

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

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  • 1. 1SesamTM40 years of successSesam Capabilities for Transportation & Installation AnalysisPål Dahlberg, Principal Sales Executive, Sesam17. April 2012
  • 2. 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, EarthquakeSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 2
  • 3. Transportation analysis - Hydrostatic analysis - Hydrodynamic/structural - Deflection and stress check - Code check - FatigueSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 3
  • 4. The SESAM suite of programsPackages:DeepC Coupled globalresponse of moored deep water floating systemsGeniE Design of beam and plate offshorestructuresHydroD Hydrodynamicanalysisof ship and floatingoffshore structuresSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 4
  • 5. Our tools – your solutions – your decisions xml xml Transportation, launching Transportation, lifting Deflections, Stresses, Deflections, Stresses, Code-check, Fatigue Code-check, Fatigue fem Non-linear analysis, Linear analysis (wave, pile/soil) collapse, accidents, Deflections, Stresses, re-qualifications Code-check, Fatigue, EarthquakeSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 5
  • 6. Transportation analysis – procedure  From base model – export the deck to new GeniE analysis  Import an existing barge (or make a new)  Move deck to intersect with skid beams or sea-fastenings  Export model for hydrostatic and hydrodynamic analysis  Import results from hydrodynamic and run linear structural analysis followed by result evaluationsSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 6
  • 7. Transportation analysis – export to hydro-static/dynamics  Same model may be used for - Panel model - Mass model - Compartment model – the filling and balancing are done during equilibrium analysisSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 7
  • 8. Transportation analysis – hydrostatic analysis  The model imported in HydroD  Hydrostatic analysis Intact condition Damaged condition Hydrostatic rule checkSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 8
  • 9. Transportation analysis – hydrodynamic analysis  Intact condition Response variables Stress evaluation Code checking FatigueSesamTM Pressure distribution Structural forces and stresses13 December 2011© Det Norske Veritas AS. All rights reserved. 9
  • 10. Transportation analysis – hydrodynamic analysis  Results from hydrodynamic analysis form the basis for - Stress evaluations - Deflection checking - Code checking - Fatigue – fatigue damage can be used as input to in-place fatigue analysis Stress distribution Fatigue lifeSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 11
  • 11. Installation analysis - Lifting - Float-over - Launching - For all deformations, forces and stressesSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 13
  • 12. Our tools – your solutions – your decisions xml xml Transportation, launching Transportation, lifting Deflections, Stresses, Deflections, Stresses, Code-check, Fatigue Code-check, Fatigue fem Non-linear analysis, Linear analysis (wave, pile/soil) collapse, accidents, Deflections, Stresses, re-qualifications Code-check, Fatigue, EarthquakeSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 14
  • 13. Marine operations  Sesam covers all stages of marine operations - Transportation, launching, upending, float-over, lifting, towing etc.SesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 15
  • 14. Marine operations – launching & up-endingSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 16
  • 15. Main new features version 6.1  Tension/Compression (T/C) analysis - Uniform upwards load Compression elements Tension elementsSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 17
  • 16. Main new features version 6.1  Tension/Compression (T/C) analysis - Uniform upwards load Compression elements not contributing to stiffness No axial stress Tension elements contributing to stiffness Compression/tension (truss) Positive SIGXX elements contributing to stiffnessSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 18
  • 17. Main new features version 6.1  Unconnected X-joints - No FE node created in connection - Important for trusses and tension/compression analysis - Important for data transfer to Usfos to avoid a “false” plastic hinge No FE node in intersectionSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 19
  • 18. Main new features version 6.1  T/C and unconnected X-joints - Structure massCompr. element in compression has negative SigXX Tension element in tension has positive SigXXCompr. element in tension has no SigXX Tension element in compression has no SigXXSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 20
  • 19. Safeguarding life, property and the environment www.dnv.comSesamTM13 December 2011© Det Norske Veritas AS. All rights reserved. 21

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