Sesam Capabilities for Transportation & Installation Analysis

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SesamTM 40 years of success Sesam Capabilities for Transportation & Installation Analysis

Pål Dahlberg, Principal Sales Executive, Sesam 17. April 2012

Our tools – your solutions – your decisions

Transportation, launching Deflections, Stresses, Code-check, Fatigue

Transportation, lifting Deflections, Stresses, Code-check, Fatigue

Linear analysis (wave, pile/soil) Deflections, Stresses, Code-check, Fatigue, Earthquake

Non-linear analysis, collapse, accidents, re-qualifications SesamTM 13 December 2011 © Det Norske Veritas AS. All rights reserved.

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Transportation analysis -

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

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

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The SESAM suite of programs 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


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xml

xml



fem



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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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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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Transportation analysis – hydrostatic analysis  The model imported in HydroD

 Hydrostatic analysis

Intact condition

Damaged condition

Hydrostatic rule check


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Transportation analysis – hydrodynamic analysis  Intact condition

Response variables

Stress evaluation Code checking Fatigue

SesamTM

Pressure distribution

Structural forces and stresses

13 December 2011 © Det Norske Veritas AS. All rights reserved.

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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 life


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Installation analysis -

Lifting Float-over Launching For all deformations, forces and stresses


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xml

xml



fem



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Marine operations  Sesam covers all stages of marine operations - Transportation, launching, upending, float-over, lifting, towing etc.


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Marine operations – launching & up-ending


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Main new features version 6.1  Tension/Compression (T/C) analysis - Uniform upwards load

Compression elements

Tension elements


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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 Positive SIGXX

Compression/tension (truss) elements contributing to stiffness


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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 intersection


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Main new features version 6.1  T/C and unconnected X-joints - Structure mass

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


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Sesam Capabilities for Transportation & Installation Analysis

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