Suc. Monterrey Costa Rica Siemens S A Suc. Puebla El Salvador
SUC Brasil 2012 : Next Generation Hydrod and Recent Development in Hydrod
-
Upload
joao-henrique-volpini-mattos -
Category
Technology
-
view
209 -
download
0
description
Transcript of SUC Brasil 2012 : Next Generation Hydrod and Recent Development in Hydrod
Fan Joe Zhang, Sesam BD Manager, Region AmericasDecember 03, 2012
SesamTM
Continuing 40 years success
Next generation HydroD and Recent development in HydroD
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Why HydroD 5?
� Major architecture upgrade
� Requested features for stability analysis
� New requirements to reporting features
� Part of overall plan to integrate modelling, analysis and post-processing
� Reduced memory usage
� Request to utilize multiple CPU’s for UI (responsiveness) and Stability calculations
� Request for Multiple views
� Stronger script capabilities – full access to model and results and integration with 3rd part components (.NET)
2
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
New and improved features
� Improved hydrostatic calculations- More robust algorithms- Inclusion of beams
� New reporting functionality- Stability reports- Analysis documentation
3
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
User interface
� Templates
� Improved activity monitor
� Add-ins
4
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Changes in hydro models – concept models
� Reuse of models in workspace
� Compartment model separated from structural model
� Use of FEM files- Panel model- Morison model- Mass model- Compartment model- Structural model
5
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
New workspace
Template
Functions
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Stability analysis example
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Interactive definitions
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
More information, e.g. Structure model
Extra information
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
More information, e.g. loading condition
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Stability analysis results
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Recent development in HydroD/Wadam - Tank dynamics
� Several isolated internal fluid domains with variable fluid density.
� Could be full, or partially filled.
� Change the total restoring matrix if internal free surface exist.
� Added mass from the internal fluid.
12
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Tank dynamics, Current approach and limitation 1
� Tanks are identified from the structure model with dummy hydro pressure defined for the panels enclosing each whole tank, with normal direction pointing from the fluid towards the tank wall. LC numbering starting from 2, each LC correspond to one tank. LC1 corresponds to the external wet hull.
� The internal fluid is regarded as rigid body. No internal waves or relative motion.
� Internal free surface is accounted (by HydroD) with additional restoring matrix.
� Tank fluid Mass is calculated by HydroD and added to the total hull mass, to be balanced with buoyancy force.
� Filling fraction is defined in HydroD, the dummy hydro pressure property is removed for the dry part of the panels if the tank is not filled.
� User can control the location of the “Acceleration point” (ARP) and Zero level point (ZRP)
13
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Tank dynamics, the feature under development
� The internal radiation is solved for each tank. � �� ��_���� � �� � � �
� � � � �_���� � �� � �_������ � � �
� Load transfer
� The zero pressure reference point will always be at the exact internal free surface.
� The acceleration point is not needed anymore.
� More accurate, no assumption.
14
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Basic scenario
� Internal fluid and external fluid is handled in exactly the same way- Panel model and structural model need not be the same- Panel model is automatically adjusted by Wadam to fit the free surface- Same method for load transfer
15
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Tank dynamics, New Approach
� The dummy hydro pressure property need to be defined in Panel model to distinguish the each tank panels and solve the internal radiation problem (in addition to Structure model). Dummy hydro pressure with LC1 representing the external wet hull -> LC2 … each for one tank.
� Free surface cutting algorithm is applied to tank wet panels (the same as for external wet hull, to secure the correct internal free surface level).
� The balancing check updated. Now, mass model exclude the tank fluid.
� Restoring correction is solved for each tank inside WADAM (not from HydroDanymore), and added to the total restoring matrix.
� Radiation problem solved for external hull and then loop through all tanks.
� Load transfer and sectional load taking the radiation pressure and fluctuating restoring pressure for each tank.
� Full tank scenario.
16
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Motivation for including internal fluid dynamics
� More correct motions - Include both added mass and restoring from the compartment
� More consistent load transfer- Same pressure loads in computation of motion and in load transfer
17
34838 2.1E6
New Old
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Dynamic pressure
18
New Old
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
HydroD V4 modifications
� Checking include dynamics will disable Add mass and enforce Update stiffness
� A parameter for internal fluid dynamics is written on Wadam1.FEM- Global setting
� Compartments are included in the panel model
� HydroD5 – compartment model as a separate model
19
Include dynamics of internal fluid
© Det Norske Veritas AS. All rights reserved.
SesamTM Continuing 40 years success
December 03, 2012
Safeguarding life, property and the environment
www.dnv.com
20