Presented at SUC by Ole Jan Nekstad from DNV, about houw to import finite element of CAD data to Sesam GeniE

1. SesamTM
40 years of success
Importing FE/CAD data to Sesam GeniE
Ole Jan Nekstad
Product Director - Sesam
3 December 2012

2. Why change to Sesam – What’s in it for the customer
• Design and engineering efficiency
Reduce
• Lower building cost
Cost
• Lower operational cost
• Transaparency and sustainability
Business Managed
• Regulatory requirements
Value Risk
• Standards compliance
• Optimised performance
Return on
• Reduced downtime
Asset
• Extended lifetime
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3. Which purposes can a model
serve when imported into Sesam?
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4. Our tools – your solutions – your decisions
Transportation, launching Transportation, lifting
Deflections, stresses, Deflections, stresses,
code-check, fatigue code-check, fatigue
Data import
Non-linear analysis, In-place analysis (wave, pile-soil)
collapse, accidents, Deflections, stresses,
re-qualifications, life extensions code-check, fatigue, earthquake
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5. Re-use structural analysis model during life time
Sesam for Synergi Structure for
Design Inspection planning,
execution and follow up
Modification
Condition monitoring
Life extension
Trending
Sacs
STAAD.Pro
ANSYS
Rhino
DXF
Sesam Synergi Structure
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6. Import to Sesam GeniE - data formats supported
Finite element data (CAE)
- FEM format
- Sacs format
- StruCad3D
- StaadPro
- Ansys
CAD data (lines)
- DXF
- Rhino
- SAT
- PDMS (sdnf)
- PDS (sdnf)
CAD data (surfaces)
- SAT
- Rhino (prototype)
- S3D (prototype)
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7. Importing old Sesam format
- Structure
- Loads
- Wave load conditions
- Soil data
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8. Importing old Sesam format to GeniE
Primarily for converting re-analysis models of jackets,
in some cases import of surface models
- Preframe, Prefem, Patran-Pre
For frame and plate structures
- Basically all structure, sections and materials. The
numbering system for beams may be maintained
- Manually defined loads such as point, line, pressure,
acceleration loads
- Wave load data such as hydrodynamic properties,
current, wave and load conditions
- Soil data
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9. Importing Sacs format
- Structure
- Loads
- Wave load conditions
- Load combinations
- Pile
- Soil
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10. Importing a Sacs model into Sesam GeniE
The procedure today
- Import structure, sections, materials (automatic)
- Import wishbone connections (automatic)
- Import wave load data (automatic)
- Import load combinations (automatic)
- Import pile data (automatic)
- Import soil data (automatic)
- Add blanket and equipment loads
Once the model has been imported and
verified it can be used for all types of
analyses in Sesam
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11. What are we developing wrt. Sacs import
Import of tapered elements – Q3/2013
- Will be converted to segmented members
- Today – converted to smallest section
Import of blanket loads – Q3/2013
- Equipments and footprints in Sesam GeniE to be used
- Today manual conversion of data – an easy task
Import of equipments – Q3/2013
- Equipments and footprints in Sesam GeniE to be used
- Today manual conversion of data – an easy task
Import of wind load data – Q3/2013
- Beams and equipments
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12. Demo - 2
Importing a module
- 300 load combinations
All data is imported and no manual work
is needed
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13. Demo - 5
A jacket where piles and soil are imported
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14. Importing StruCad format
- Structure
- Loads
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15. Importing StruCad data
Capabilities structure, sections,
materials and manually defined loads
- Includes beams and plates
Limitations
- Load combinations
- Hydrodynamic properties and wave loads
- Pile and soil data
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16. Importing StaadPro format
- Structure
- Loads
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17. Importing StaadPro data
Capabilities structure and manually
defined loads and load combinations
- Includes beams, plates, eccentricities,
boundary conditions
Limitations
- Sections not defined in StaadPro (reference
to database)
- A separate utility tool creating a GeniE js-file
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18. A typical example
A small topside
- All converted and analysis can be run at once
- 78 basic load cases, 73 load combinations
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19. Importing Ansys format
- Structure
- Loads
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20. Importing Ansys data
The Ansys file is converted to a FEM file for
import to GeniE
- Structure, sections, materials and manually defined
loads
Limitations
- Linear dependencies and second order elements
- Surface and line loads on shells. Temperature
loads
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21. Example
Midship frame
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22. Import lines from CAD
- DXF
- Rhino
- SAT
- PDMS (sdnf)
- PDS (sdnf)
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23. Import DXF
Points, lines and poly-lines
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24. Import DXF – a typical barge
Poly-lines used in skinning
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25. Import DXF – a typical FPSO
Curves form the basis of surface generations – cover, skinning, curve-net
interpolation
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26. Import from Rhino
Requires that customer has Rhino and installs a plug-in Rhino4ToGeniE.rhp
developed by us
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27. Import from Rhino
The plug-in will produce a js-file for import to GeniE
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28. Import lines from Rhino
Example of importing selected lines from Rhino
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29. Import lines from Rhino
A real case example
- The lines are exported from Rhino and surfaces are made by cover, flat-region, skinning and
curve-net interpolation
- There are few surfaces leading to a model that is applicable for establishing both a panel
model and a structural analysis model
Rhino model
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30. Import lines from Rhino
Details of the hull
Rhino model GeniE lines
GeniE mesh
GeniE surface
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31. Import lines from Rhino
Details of interior
Rhino model GeniE lines
GeniE mesh
GeniE surface
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32. Some remarks on DXF and Rhino
Early versions of DXF; lines and circles only – these lines need to be approximated
with splines before making the surfaces
Newer versions of DXF and Rhino use splines and NURBS – surface generation
can be done on these
Example of many small lines
approximated with splines
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33. The importance of having as few surfaces as possible
Better user control of the mesh
- Coarse element density, global strength analysis and panel modelling
- Fine mesh density, detailed strength analysis
Coarse mesh Fine mesh
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34. Export lines to Rhino
On-going development
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35. Import surfaces from CAD
- SAT
- Rhino – prototype
- S3D – prototype
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36. Surfaces from SAT
A surface made in a CAD system supporting the SAT format
- Several surfaces removed for visibility
Label free edges
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37. Surfaces from Rhino – example 1
A surface made in Rhino
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38. Surfaces from Rhino – example 1
Imported to Sesam GeniE
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39. Surfaces from Rhino – example 2
Another surface made in Rhino
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40. Surfaces from Rhino – example 2
Imported to Sesam GeniE
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41. Surfaces to Rhino – example 3
Curves created in Rhino
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42. Surfaces to Rhino – example 3
Curves imported to Sesam GeniE
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43. Surfaces to Rhino – example 3
Surfaces made in Sesam GeniE
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44. Surfaces to Rhino – example 3
Surfaces exported from Sesam GeniE to Rhino
- The hull is now mirrored as compared to the starting position in Rhino
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45. Model data from S3D
Intergraph is making a prototype converter supporting the Sesam GeniE XML format
- Better than pure geometry data transfer
- Material, thickness, section properties part of the data conversion
S3D
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46. To summarize
Convert model to Sesam GeniE format
3 December 2012
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47. Import to Sesam GeniE - data formats supported
Finite element data (CAE)
- FEM format
- Sacs format
- StruCad3D
- StaadPro
- Ansys
CAD data (lines)
- DXF
- Rhino
- SAT
- PDMS (sdnf)
- PDS (sdnf)
CAD data (surfaces)
- SAT
- Rhino (prototype)
Convert model to Sesam GeniE format
3 December 2012
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48. Crossing the bridge to Sesam
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49. Crossing the bridge gives access to a complete system
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50. Crossing the bridge to Sesam GeniE
There are operators that are migrating their data to Sesam
- A leading operator world wide has 200+ models to be converted
Pilot projects with other leading operators on data
migration
- In total these have more than 500 data models to be converted
A streamline conversion process will lead to economic
gains for the operators
- Quality of data transfer, support, assistance, software
functionality, long term commitments from DNVS
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51. Safeguarding life, property
and the environment
www.dnv.com
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