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

1. 1
SesamTM
40 years of success
Migrating models from other systems to Sesam
Pål Dahlberg, Sesam Principal Sales Executive
17 April, 2012

2. Why Sesam
One common tool for all design
stages from construction through
installation, in-place (including
re-analysis), re-qualification to
removal
SesamTM
13 December 2011
© Det Norske Veritas AS. All rights reserved. 2

3. Benefits from using Sesam for jackets
New builds covering Manage existing Collapse analysis Modification work
entire life cycle re-analysis models Requalification - all phases
MTO, 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 other units like the floating department
SesamTM
13 December 2011
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4. Imported models open a door of
Sesam opportunities
- New build design
- Re-analysis systems
- Re-qualification
- Modifications
SesamTM
13 December 2011
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5. 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, Earthquake
SesamTM
13 December 2011
© Det Norske Veritas AS. All rights reserved. 6

6. Import of jackets, jack-ups &
topsides
- Beams and plates
- Loads and load combinations
- Wave load data
- Soil data
SesamTM
13 December 2011
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7. 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, Earthquake
SesamTM
13 December 2011
© Det Norske Veritas AS. All rights reserved. 8

8. Import from Sacs, StruCad3D and StaadPro
 Sacs and StruCad3D Sacs example
- Structure, manually defined loads & load combinations
- Completed
- On-going tasks
- Tension/compression (Q2/2012)
- Surface loads and temperature loads (Q4/2012)
- Import of pile/soil data (Q4/2012)
 StaadPro
- Structure and manually defined loads
- On-going (Q2/2012)
StruCad3D example
SesamTM
13 December 2011
© Det Norske Veritas AS. All rights reserved. 9

9. Easy to verify and appreciate the model in GeniE
 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
 List of data that are not converted
- Easy to find out what needs to be dealt with in a
manual manner
 Tools  Verify structure
SesamTM
13 December 2011
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10. 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
- 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
SesamTM
13 December 2011
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11. Demo – Import and verification
 Import the structure, the wave loads and
load combinations
- Tools  Structure verify
 Understand the structure
- Various check points like e.g. mass, centre
of gravity, boundary conditions, colour
coding, hydrodynamic properties
 Verify the loads
- Basic load cases
- Load combinations
- Wave loads
 Make reports
 Make pictures
SesamTM
13 December 2011
© Det Norske Veritas AS. All rights reserved. 25

12. Linear static analysis of reference
model
- Deflection and stress check
- Code checking
- Fatigue analysis
SesamTM
13 December 2011
© Det Norske Veritas AS. All rights reserved. 26

13. 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, Earthquake
SesamTM
13 December 2011
© Det Norske Veritas AS. All rights reserved. 27

14. Linear static analysis – main purpose
 Deflection checking
 Code checking member, tubular joints and plates
 Fatigue
SesamTM
13 December 2011
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15. Linear static analysis – deflections, stresses, forces
 Deflection check according to AISC (or your own criteria)
 Stresses/Forces (vonMises, SIGxx, SIGyy, TAUxy, Nxx, Mxy…….)
SesamTM
13 December 2011
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16. Linear static analysis – plate stresses
 VonMises plate stresses in wave load case (4,1)
- Direction 135 degrees, wave height 11.7m, wave period 10.6 sec
SesamTM
13 December 2011
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17. Automatic definition of default buckling lengths
 Global settings apply to all members The leg between two
- Can be imported via scripting from Sacs joints has three
Bm6224 members. It will be
necessary to define
 Local settings to individual members buckling lengths for
- Can be imported via scripting from Sacs each of these
Bm6223
Bm1344
The leg between
two joints has one
member. The
buckling length is
the length between
the joints – often
necessary to
modify. The
member has all the
knowledge about
the underlying FE
model
SesamTM
13 December 2011
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18. Linear static analysis – member code checking
 Code checking of members, e.g. tower and flare-boom
SesamTM
13 December 2011
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19. Linear static analysis – member code checking
 Code checking of members, e.g. helideck
SesamTM
13 December 2011
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20. Linear static analysis – member code checking
 Code checking of members, e.g. jacket
- Buckling lengths not adjusted – hence results may not be real
SesamTM
13 December 2011
© Det Norske Veritas AS. All rights reserved. 35

21. Linear static analysis – fatigue
 Sesam supports 3 options
- Deterministic fatigue (regular waves, time domain wave
load analysis)
- More accurate wave loads (any theory and proper drag)
- Simple and straight forward
- Stochastic fatigue (spectral wave load analysis)
- Structural dynamics and better coverage of
environmental conditions
- Prior to fatigue analysis partial damage may be set
- Time domain fatigue (irregular waves, time domain wave
load analysis) – also known as Rainflow Counting Fatigue
(RFC)
- Wave loads to instantaneous free surface (also for
irregular sea states)
- Non-linear pile soil effects
SesamTM
13 December 2011
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22. Linear static analysis – fatigue
 Include a refined shell model (finite element model) in the global model for the
purpose of computing stresses, SCF’s for beam fatigue or direct shell fatigue
Load combination ST01
Use the GeniE SnackPack to auto
convert from beam to shell
SesamTM
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23. To summarize:
SesamTM
13 December 2011
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24. Our value proposition and uniqueness
 Closing the design loop by modern concept modelling and work process tools
- Quick modelling
- Local model in global model
- Scripting/parametric models
- Changes during design
- One model – many analyses
- Interaction with hydro
- Advanced hydrodynamics
- Beam/plate code checking
- Beam/plate fatigue
- Non-linear pushover
- Reporting
SesamTM
13 December 2011
© Det Norske Veritas AS. All rights reserved. 39

25. Our value proposition
 Usability
- A modern design oriented tool that is easy to use and that is appealing to all engineers
- Short way from modelling to results
- Easy to do re-design
- Easy to understand and master own and imported models
 Completeness and sustainability
- One common tool for all design analysis tasks covering all conditions from construction
through installation, in-place (including re-analysis), re-qualification to removal
- Life time approach to data compatibility
- A high degree of new developments and maintenance – our income is re-invested in Sesam
 Flexible licensing model
- Our customers decide how many concurrent users and how much functionality
- Perpetual usage or lease options
 Services
- Experienced support staff, 24/5 year around, support locally talking your language
- Training at your place or our place
SesamTM
13 December 2011
© Det Norske Veritas AS. All rights reserved. 40

26. Sesam gives you
Improved • Interactive graphics – easy to understand
• Consistent model through all analysis
quality • Reports
Higher • One system to learn
• One model for all
efficiency • Control and share data model with others
More • Covering all life cycle conditions
• Share resources – concurrent engineering
flexibility • Design iterations – change capacity
SesamTM
13 December 2011
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27. Safeguarding life, property
and the environment
www.dnv.com
SesamTM
13 December 2011
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