migrating from other cae systems to sesam

Pål Dahlberg, Sesam Principal Sales Executive

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17 April, 2012

SesamTM 40 years of success

Migrating models from other systems to Sesam

© Det Norske Veritas AS. All rights reserved.

SesamTM

13 December 2011

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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

Benefits from using Sesam for jackets

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Collapse analysis

Requalification

Extreme conditions,

accidents, fire, explosion

New builds covering

entire life cycle

MTO, deflection check,

code check, fatigue

Same model for all stages – can be shared with other units like the floating department

Manage existing

re-analysis models

Understand models over time,

produce and view results

Modification work

- all phases

Design of new parts

Re-design of existing


SesamTM

13 December 2011

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Imported models open a door of Sesam opportunities - New build design - Re-analysis systems - Re-qualification - Modifications


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


Code-check, Fatigue

Transportation, launching


Code-check, Fatigue

Non-linear analysis,

collapse, accidents,

re-qualifications

../../../../DNV/Workspaces/GeniE_D6100_Rev1/KE_Sacs/Analysis3/Usfos_view.vtf


SesamTM

13 December 2011

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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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Code-check, Fatigue

xml



Code-check, Fatigue

xml



re-qualifications

fem



SesamTM

13 December 2011

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Import from Sacs, StruCad3D and StaadPro

Sacs and StruCad3D

- 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)

Sacs example

StruCad3D example


SesamTM

13 December 2011

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

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SesamTM

13 December 2011

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

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SesamTM

13 December 2011

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

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SesamTM

13 December 2011

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Linear static analysis of reference model - Deflection and stress check - Code checking - Fatigue analysis


SesamTM

13 December 2011


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Code-check, Fatigue

xml



Code-check, Fatigue

xml



re-qualifications

fem



SesamTM

13 December 2011

Linear static analysis – main purpose

Deflection checking

Code checking member, tubular joints and plates

Fatigue

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SesamTM

13 December 2011

Linear static analysis – deflections, stresses, forces

Deflection check according to AISC (or your own criteria)

Stresses/Forces (vonMises, SIGxx, SIGyy, TAUxy, Nxx, Mxy…….)

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SesamTM

13 December 2011

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

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SesamTM

13 December 2011

Global settings apply to all members

- Can be imported via scripting from Sacs

Local settings to individual members

- Can be imported via scripting from Sacs

Automatic definition of default buckling lengths

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Bm1344

Bm6223

Bm6224

The leg between two

joints has three

members. It will be

necessary to define

buckling lengths for

each of these

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

Linear static analysis – member code checking

Code checking of members, e.g. tower and flare-boom

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SesamTM

13 December 2011


Code checking of members, e.g. helideck

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SesamTM

13 December 2011


Code checking of members, e.g. jacket

- Buckling lengths not adjusted – hence results may not be real

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SesamTM

13 December 2011

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

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SesamTM

13 December 2011

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

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Use the GeniE SnackPack to auto

convert from beam to shell

Load combination ST01


SesamTM

13 December 2011

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To summarize:


SesamTM

13 December 2011

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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

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

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SesamTM

13 December 2011

Sesam gives you

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• Interactive graphics – easy to understand

• Consistent model through all analysis

• Reports

Improved quality

• One system to learn

• One model for all

• Control and share data model with others

Higher efficiency

• Covering all life cycle conditions

• Share resources – concurrent engineering

• Design iterations – change capacity

More flexibility


SesamTM

13 December 2011

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Safeguarding life, property

and the environment

www.dnv.com

migrating from other cae systems to sesam

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