Sesam Capabilities for Transportation & Installation Analysis

Pål Dahlberg, Principal Sales Executive, Sesam

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17. April 2012

SesamTM 40 years of success

Sesam Capabilities for Transportation & Installation Analysis

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

Our tools – your solutions – your decisions

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Linear analysis (wave, pile/soil)

Deflections, Stresses,

Code-check, Fatigue, Earthquake

Transportation, lifting

Deflections, Stresses,

Code-check, Fatigue

Transportation, launching

Deflections, Stresses,

Code-check, Fatigue

Non-linear analysis,

collapse, accidents,

re-qualifications

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

3

Transportation analysis - Hydrostatic analysis - Hydrodynamic/structural - Deflection and stress check - Code check - Fatigue

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

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Packages:

DeepC Coupled global

response

of moored deep water

floating systems

GeniE Design of beam and

plate offshore

structures

HydroD Hydrodynamic

analysis

of ship and floating

offshore structures

The SESAM suite of programs

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

Our tools – your solutions – your decisions

5

Linear analysis (wave, pile/soil)

Deflections, Stresses,

Code-check, Fatigue, Earthquake

Transportation, lifting

Deflections, Stresses,

Code-check, Fatigue

xml

Transportation, launching

Deflections, Stresses,

Code-check, Fatigue

xml

Non-linear analysis,

collapse, accidents,

re-qualifications

fem

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

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 evaluations

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© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

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 analysis

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© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

Transportation analysis – hydrostatic analysis

The model imported in HydroD Hydrostatic analysis

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Intact condition

Damaged condition

Hydrostatic rule check

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

Transportation analysis – hydrodynamic analysis

Intact condition

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Response variables

Pressure distribution Structural forces and stresses

Stress evaluation

Code checking

Fatigue

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

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

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Stress distribution Fatigue life

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

13

Installation analysis - Lifting - Float-over - Launching - For all deformations, forces and

stresses

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

Our tools – your solutions – your decisions

14

Linear analysis (wave, pile/soil)

Deflections, Stresses,

Code-check, Fatigue, Earthquake

Transportation, lifting

Deflections, Stresses,

Code-check, Fatigue

xml

Transportation, launching

Deflections, Stresses,

Code-check, Fatigue

xml

Non-linear analysis,

collapse, accidents,

re-qualifications

fem

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

Marine operations

Sesam covers all stages of marine operations

- Transportation, launching, upending, float-over, lifting, towing etc.

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© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

Marine operations – launching & up-ending

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© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

Main new features version 6.1

Tension/Compression (T/C) analysis

- Uniform upwards load

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Tension elements

Compression elements

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

Main new features version 6.1

Tension/Compression (T/C) analysis

- Uniform upwards load

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Tension elements

contributing to stiffness

Positive SIGXX

Compression elements

not contributing to stiffness

No axial stress

Compression/tension (truss)

elements contributing to

stiffness

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

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

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No FE node

in intersection

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

Main new features version 6.1

T/C and unconnected X-joints

- Structure mass

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Compr. element in compression has negative SigXX

Compr. element in tension has no SigXX

Tension element in tension has positive SigXX

Tension element in compression has no SigXX

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

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Safeguarding life, property

and the environment

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