New Features in GeniE, DeepC and HydroD

1
SesamTM
40 years of success
New features in GeniE, DeepC and HydroD
June 2011
Ole Jan Nekstad, Sesam Product Manager, DNV Software
20 August 2011

Supporting Win XP, Win 7
and Win Vista
Main new features 32bit as well as 64bit

 GeniE v5.3  DeepC v4.5
1. Beam deflection reporting 1. Regular wave condition
2. Flexible code checking of beams 2. Direction dependent scatter diagram
3. Import of old Sesam frame models 3. Parallel execution
4. Import of old Sesam soil models 4. Cross-section and fatigue analysis of
umbilicals
5. Import of results from super element
analysis  HydroD v4.5
6. Wave load analysis including local shell 1. Multibody additional damping
models
2. Compartment load retrieval independent of
7. Easier modelling of planar surfaces sub-model
8. More advanced use of cut plane 3. User defined pressure reduction region
9. More features for making geometry 4. User defined reference point for calculation
of results
10. Faster updating of finite element models
5. Automatic proposal for the number of
11. Become more efficient by using scripting panels needed for an optimum analysis

SesamTM
20 August 2011
© Det Norske Veritas AS. All rights reserved. 2

DeepC, GeniE and HydroD part of Sesam 2011 Aug DVD

SesamTM
20 August 2011

GeniE v5.3 - Benefits
A major focus of this release has been to ease the work to do beam
deflection reporting and to model complex surfaces.

Another main reason for the release has also been to allow for
import of old frame models and results to do result presentation and
code checking in GeniE - a typical example of such is the import of
data from existing SRS (structural reanalysis systems).

Finally, we have made the code checking more flexible. To better
support design requirements, users will now have the possibility of
not strictly following the interpretations as given by the various
statutory regulations, which can be over conservative.
SesamTM
20 August 2011

1. GeniE – beam deflection reporting
 Easier to document compliance with
statutory requirements
- Beams with one finite element
- Cubic interpolation and local loads
- Scanning many load cases
- Check against AISC levels 180, 240 and 320

SesamTM
20 August 2011

2. GeniE – more flexible code checking of beams
 User controlled options added to over-rule
defaults in code checking standards
- Standards some times to conservative
- User controlled options may lead to non-conservative
results

 Run larger number of load cases for code check
(AISC, EC, ISO)
- Does not store all loads and code checking results
- This is the default setting for a code check run

 Code check updates Use of default max
- AISC: Exclude torsion effects when computing bending moment
vonMises stresses (Chapter G)
- Eurocode: Include plastic moment of inertia in
formulae 6.2
- API (WSD/LRFD), AISC (ASD/LRFD), ISO, Norsok:
Use of local bending
user to decide max bending option (default) or local
moment
bending moment

 Label code check buckling lengths

SesamTM
20 August 2011

3. GeniE – import old Sesam frame models
 Import old frame & planar plate models and retain finite element numbering system
- You may modify material & section properties, beam eccentricities as well as plate
thicknesses Preframe model
- Wajac load files automatically imported
- File Import FEM file

Model imported in GeniE

SesamTM
20 August 2011

4. GeniE – import old Sesam soil models
 Import old soil models and convert them to environment definitions
- Should be done prior to any modelling as a default environment with water depth 10 m is
created
- File Import GENSOD file
Model imported in GeniE

Manual input format

SesamTM
20 August 2011

5. GeniE – import of results from super element analysis
 Use results generated outside GeniE for post-processing and code checking
- Super element analysis, merge operations in Prepost
- Old analysis together with import FEM and retain numbering system (e.g. SRS models)
- Add yield data to material properties
- File Import External Results SIN file

1. Import FEM 2. Import SIN Wave loads part of FEM import

SesamTM
20 August 2011

6. GeniE – wave load analysis including local shell models
 Run large wave load analysis with multiple local shell models
- Limitation of beam elements increased from 20.000 to 60.000 beams, hence possible to run
large analysis models without the use of super element technique
- Number of time steps in wave load analysis increased from 8.192 to 262.144 time steps – it
is now possible to run with much smaller time steps to capture peaks
- Boundaries for local shell model (loads and stiffness) automatically generated and updated
- Load-cases for minimum shear and overturning moment in addition to maximum

SesamTM
20 August 2011

7. GeniE – easier modelling of planar surfaces
 Flat region modelling enables modelling of closed surfaces by single user
operations
- No longer needed to split continuous lines to create plates
- Saving up to 4-5 user operations per plate
- Insert  Plate  Flat Region

Flat region tool sets up a The boundaries Each plate can be
temporary cut-plane automatically created by clicking a
defined by user shown closed area
SesamTM
20 August 2011

8. GeniE – more advanced use of cut plane
 The Point/Vector and 3-Points cut plane makes dividing structural parts much easier
- Previously limited to global axis planes

The temporarily cut plane is
perpendicular to axis
Point1 -> Point8
SesamTM
20 August 2011

9. GeniE – more features for making geometry
 Scaling and offsetting of curves and surfaces makes it easier to make regular as
well as complex geometrical shapes
- Scaling around a point is often used to create similar shapes for the purpose of making
structure and controlling finite element mesh, Edit  Copy
- Offsetting will create similar shape (line or surface) in a given distance

SesamTM
20 August 2011

10. GeniE – faster update of finite element mesh
 When properties are modified, but the topology is unchanged the creation of a finite
element mesh can be much faster. For large models, significant performance
improvements are achieved when updating analysis models
- Always Regenerate Mesh: Regenerates all, takes the longest time, same as before, default
option
- Conditional Regenerate Mesh: GeniE detects what to do, regenerate all or just update
properties (materials, sections, thicknesses) or load intensities
- Never Regenerate Mesh: Updating properties and load intensities
- Edit  Rules  Meshing

Option:
Never Regenerate Mesh

SesamTM
20 August 2011

11. GeniE – become more efficient by using scripting
 The GeniE SnackPack gives you access to a number of script utilities that you can
use to improve your performance
- Access from DNV Software web site under downloads (https://projects.dnv.com/sesam/Genie_utils/index.html)
- Learn from pre-defined scripts and make your own

Example:
How to convert a beam
model to a shell model?
SesamTM
20 August 2011

GeniE v6.0 – Benefits
Full support of 64 bit technology will give our users access to
“unlimited amount” of memory. This will in particular help out
when modelling very large models, but also during code checking
of models with a significant number of load cases.
Furthermore, it can import additional Sacs data and the code
checking has been made even more flexible for the ISO standard.
Scheduled for release September 2011. It is not part of the Sesam
2011 August DVD, but can be downloaded from our Customer
Portal

SesamTM
20 August 2011

Main new features version 6.0-**
 True 32 and 64 bit applications – “unlimited access to data memory”
 Enhanced import of Sacs data – load combinations, improved handling of beam line
and point loads, and support for additional profile libraries
 Beam code check updates
- ISO standard: Check of critical joints where factor Ub can be computed by GeniE based on
member code check. Users can also specify minimum allowed value of Ub
- ISO standard: Added an alternative formula for X-joints in tension (OMAE2008-57650(8))
- Perform code check of very large models by saving results on a new format (file and not
database) – significantly reduced risk of running out of virtual memory
 Reporting: Save report to CSV format in addition to txt, html, Word(xml), Excel(xml)
 Much faster display of plates and beams, both structure and mesh view, possibly up
to an order of magnitude for large models
 Change properties for existing support points and point masses without the need to
always regenerate the finite element mesh
 Combine imported result cases for use in result presentations and code checking

SesamTM
20 August 2011

DeepC v4.5 – Benefits
A major update of this release is the possibility to use regular
waves in addition to irregular waves for fatigue analyses.
Compared with irregular wave fatigue used for detailed fatigue
analysis, the new regular wave fatigue functionality let the user get
the fatigue results much quicker in the initial design process. Other
important benefits are the handling of direction dependent scatter
diagrams and parallel execution to run an arbitrary number of
analyses at the same time.
DeepC also supports cross-section drawings, cross-section analysis
(capacity curves) and fatigue analysis of helix elements in
umbilicals and flexible risers. DeepC has thus become a complete
solution for all slender structures like risers, mooring lines and
umbilicals.
SesamTM
20 August 2011

1. DeepC – include regular wave condition
 Main benefit: Regular in addition to irregular wave conditions
 A typical regular wave fatigue analysis approach is similar to irregular wave fatigue
analysis, which normally includes:
- Creating multiple regular waves and multiple regular time conditions based on a height/time
scatter diagram
- Specifying a number of periods (typically 10) based on a predefined analysis template
- Running all the analyses and making a fatigue analysis. During the analysis, an explicit time
interval may also be given

 Regular wave conditions can also be used in a coupled analysis.

Regular wave shown

SesamTM
20 August 2011

2. DeepC – direction dependent scatter diagrams
 Main benefit: The definition of multiple scatter diagrams
 This functionality will make it much easier to handle
direction dependent scatter diagrams.
- Users just need to specify the probabilities of each
scatter discretization as shown in the figure to the right.
- The new functionality applies both to regular and
irregular wave scatter diagrams.

SesamTM
20 August 2011

3. DeepC – parallel execution
 Possible to run an arbitrary number of analyses in parallel.
- This will lead to reduction in analysis elapsed time

SesamTM
20 August 2011

4. DeepC – cross-section and fatigue analysis of umbilicals
 Sesam extends its portfolio by providing tools for cross-section analysis and efficient
fatigue analysis of helix elements in umbilicals and flexible risers
- UmbiliCAD makes an engineer’s produce cross-section drawings and linear cross
section analysis within hours increasing the precision level in the bidding process as well
as in the detailed engineering phase.
- Helica performs the non-linear cross section analysis and fatigue analysis faster than
other systems without the need for a detailed finite element model. The input for short
term fatigue comes from a DeepC time domain analysis (environmental data) while the
cross section details comes from UmbiliCAD.
Capacity Curve
1200
100% Utilisation
1100 80% Utilisation
1000
900
800

Tension [kN]
700
600
500
400
300
200
100
0.0
0.0 0.04 0.08 0.12 0.16 0.2 0.24 0.28
Curvature [1/m]

SesamTM
20 August 2011

HydroD v4.5 – Benefits
When sub-modelling techniques are used we have now made the
sub-model independent of the compartment – this means that it is
now possible to retrieve loads from the compartments even though
only parts of the compartment is part of a sub-model. Hydro-
dynamic results like RAO’s can be calculated based on user
defined reference points in addition to the still water line.
Flexibility in user specification of simulating pressure loading in a
zone around the mean free surface has also been introduced. And
for those who do hydrodynamic analysis of multi bodies it is now
possible to define an additional coupled damping matrix for the
bodies. Finally, much larger time domain analysis can be carried
out since the computational engine supports 64bit application
technology.
SesamTM
20 August 2011

1. HydroD – multi-body additional damping
 For multi-body analysis in frequency domain it is possible to run up to 15 different
bodies. We have made such analysis even more powerful by allowing the user to
specify an additional coupled damping matrix for the bodies.

Additional damping matrix.
This layout shows a 12x12 matrix for 2
bodies

SesamTM
20 August 2011

2. HydroD – improved compartment load retrieval
 Compartment load retrieval independent of sub-model
- The definition of acceleration and zero pressure reference points allows that a submodel
may be independent of a compartment
- In other words, a sub-model may contain partial compartments also for load transfer
- Flexibility in modelling compartment model and sub-models

Compartments
global model
Sub-model at
node Load retrieval from
compartments to sub-
model
SesamTM
20 August 2011

3. HydroD – user defined pressure reduction region
 Apply a user defined pressure reduction region on a selected part of the vessel
- The the method is only recommended on the part of the vessel which is wall-sided and
should thus be controlled by the user
- Benefit: User defined in addition to supporting the DNV rules
- This option is available for both frequency and time domain analysis

User defined wall-sided part

SesamTM
20 August 2011

4. HydroD – user defined reference point
Surge
 User defined reference point for calculation
of results 1.4

- More flexibility as the reference point can be 1.2

used for calculation of hydrodynamic results 1

Amplitude
like e.g. motions, forces and RAO’s 0.8

0.6
- Applicable for results from both frequency and
0.4
time domain analysis
0.2

0

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32
Period

Sway

1.4

1.2

1

Amplitude
0.8

0.6
Two different reference points 0.4

0.2

0
4

6

8

10

12

14

16

18

20

22

24

26

28

30

32
Period

SesamTM
20 August 2011

5. HydroD – optimum panel definitions
 Automatic proposal for the number of panels needed for an optimum analysis
- When creating a panel model from a section model
- Based on the model dimensions and mesh criteria

Different panels proposed for different model dimensions
SesamTM
20 August 2011

Continuing 40 years of success

SesamTM
20 August 2011

Safeguarding life, property
and the environment

www.dnv.com

SesamTM
20 August 2011

New Features in GeniE, DeepC and HydroD

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