The EARmodel Fundamentals and IAS Implementation Volvo Aero

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The EAR-model Fundamentals andIAS Implementation
_at_ Volvo Aero

• Mats Lindeblad, M.Sc. ME
• CAE Systems Integration Specialist
• Dept. Advanced Engineering
• Div. Jet Engine Components
• Email Mats.Lindeblad_at_Volvo.com

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Presentation Topics

• Overview of IAS-environment and the EAR-model
• A business case example of a CAE analysis
• An Integrated Analysis System - IAS
• The Engineering Analysis Results model EAR
• The EAR-based IAS environment _at_ Volvo Aero
• Demo run CGNS-file to STEP/P21-file mapping
• Concluding remarks
• Questions Answers(?)

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Engineering Analysis Integration IAS1

• Target
• Secure the interpretation of engineering
  analysis results and measurement for long term
  review and reuse

• Components
• The EAR2-model - a common data structure for all
  CAE3 disciplines EAR-data based on an
  ISO-standard
• A platform independent application that enable
  direct transformation of EAR and measurements
  information between any format
• Work methods and environment for the development
  and maintenance of exchange tools and
  EAR-dictionaries

1IAS - Integrated Analysis System, 2EAR -
Engineering Analysis Results, 3CAE - Computer
Aided Engineering
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The CAE Environment of Today

• Numerous methods/tools within each analysis
  discipline
• Structural, Aero-/Thermodynamics and
  Manufacturing simulation
• Complex simulations - data exchange both between
  and within respective discipline
• Thermal and aerodynamic influence on structural
  response
• Focus on high quality content within limited time
  frame
• Early adoption in design process with rapid
  cycling of cases
• Demands on traceability for quality assurance

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Presentation Topics

• Overview of IAS-environment and the EAR-model
• A business case example of a CAE analysis
• An Integrated Analysis System - IAS
• The Engineering Analysis Results model EAR
• The EAR-based IAS environment _at_ Volvo Aero
• Demo run CGNS-file to STEP/P21-file mapping
• Concluding remarks
• Q A

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Presentation Topics

• Overview of IAS-environment and the EAR-model
• A business case example of a CAE analysis
• An Integrated Analysis System - IAS
• The Engineering Analysis Results model EAR
• The EAR-based IAS environment _at_ Volvo Aero
• Demo run CGNS-file to STEP/P21-file mapping
• Concluding remarks
• Q A

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An Integrated Analysis System - IAS
Information- model(s)(PRISM / EAR) as physical
file or database
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The Fundamental Requirements for an IAS

• Functionality
• Integration of commercial, in-house and legacy
  applications
• Shorten analysis lead times
• Development and execution performance
• Flexibility
• Computer platform independence
• Cross discipline optimisation of aerodynamics and
  structures
• Simultaneous availability of multiple
  implementation versions
• Traceability
• Self contained and standards based exchange
  format
• Evolution management of EAR-model and mapping
  methods
• Dictionary based property management

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The Integrated Analysis System Today

• The EAR-model - supporting all disciplines EAR
  formats
• Standards based (STEP/EXPRESS)
• Self-contained and computer interpretable
  definition
• A platform independent application for EAR data
  mapping
• C data structures, ANSI-C for mapping
  algorithms
• Windows, Linux, UNIX
• CGNS, Fluent , VolSol, ANSYS, MSC/Patran...
• Work methods and environment for development of
  application and dictionaries
• Team based development (IAS and Application
  knowledge)
• Common source code repository with version
  control (CVS)

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Presentation Topics

• Overview of IAS-environment and the EAR-model
• A business case example of a CAE analysis
• An Integrated Analysis System - IAS
• The Engineering Analysis Results model EAR
• The EAR-based IAS environment _at_ Volvo Aero
• Demo run CGNS-file to STEP/P21-file mapping
• Concluding remarks
• Q A

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The EAR information modelEXPRESS-G Page 2(14)
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EAR-model Concepts

• Multi-domain, mesh based engineering analysis
  results
• Aerodynamic, structural and manufacturing
  simulations
• Multiple cases with transient content
• Dictionaries for properties, units and more
• Property representation
• Properties and units
• Co-ordinate system and system relations
• Components a property collection thing
• Materials, gases, boundary conditions, ...

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The EAR-model Design Goals

• Semantically complete EAR-data representation
• Unambiguous model creation and navigation
• Efficient P21-file and database representations
• Implementation execution and development
  performance

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Presentation Topics

• Overview of IAS-environment and the EAR-model
• A business case example of a CAE analysis
• An Integrated Analysis System - IAS
• The Engineering Analysis Results model EAR
• The EAR-based IAS environment _at_ Volvo Aero
• Demo run CGNS-file to STEP/P21-file mapping
• Concluding remarks
• Q A

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The EAR-based IAS environment _at_ Volvo Aero

• Executable tools
• ias_convert
• The any to any conversion tool
• (tsint3d)
• A generic 3D triangulated surface to surface
  results interpolation method
• Tool common import/export mapping methods
• CGNS import/export
• ANSYS import
• MSC/Patran neutral format import/export
• ...
• Domain specific property dictionaries
• cgns_types.stp, ansys_types.stp, ...
• Common property classes and units dictionaries
• common_property_types.stp, common_unit_types.stp,
  ...

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Presentation Topics

• Overview of IAS-environment and the EAR-model
• A business case example of a CAE analysis
• An Integrated Analysis System - IAS
• The Engineering Analysis Results model EAR
• The EAR-based IAS environment _at_ Volvo Aero
• Demo run CGNS-file to STEP/P21-file mapping
• Concluding remarks
• Q A

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Demo run of CGNS-data to STEP/P21 export

• Source
• The example file bump.cgns from
  http//www.cgns.org
• Target
• An archiveable STEP/P21-file bump.stp
• Execution environment
• Import method with linked in standard
  CGNS-library
• STEP/P21 export method by ST-Developer of
  Steptools Inc.
• A CGNS domain specific EAR-dictionary file for
  properties
• The IAS-common EAR-dictionaries for property
  classes and units

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The CGNS Domain Dictionary STEP-file
/ The Density Variable with the attached
kg/m3 Unit / / The Density Variable
/ / The Density Unit / / The
Dictionary References /

• 1PROPERTY_UNITS(2,(4))
• 2PROPERTY_VARIABLE('Density',('Static
  density'),3,('Density'))
• 3CLASS_OF_PROPERTY_REFERENCE(,,,,,'density'
  ,5,)
• 4DERIVED_SI_UNIT_REFERENCE(,,,,'kg/m3',6,)
  
• 5EAR_LIBRARY_REFERENCE('common_property_types','
  v1r1s1',)
• 6UNITS_LIBRARY_REFERENCE('common_unit_types','v1
  r1s1',)

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The Common Property Dictionary STEP-file

• / The Dictionary /
• 1EAR_LIBRARY('common_property_types,'v1r1s1',
• (''),(),...,(2),...,())
• / The Property Class /
• 2CLASS_OF_PROPERTY('density',('Density'),1,('rho
  '),(3))
• / The Dimensionality /
• 3DIMENSIONALITY((
• -3, / length_measure /
• 1, / mass /
• 0, / time /
• 0, / electrical_current /
• 0, / thermodynamic_temperature /
• 0, / amount_of_substance /
• 0, / luminous_intensity /
• ...))

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The Common Unit Dictionary STEP-file

• / The Dictionary /
• 1UNITS_LIBRARY('common_unit_types','v1r1s1',('..
  .'),(...),
• (...,2,...))
• / The Unit /
• 2DERIVED_SI_UNIT('kilograms/cubic
  metre','kg/m3',('...'),)
• 3DERIVED_SI_BASE_ELEMENT(.KILOGRAM.,2,1)
• 4DERIVED_SI_BASE_ELEMENT(.METRE.,2,-3)

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Import of CGNS-file bump.cgns 1(2)
user_at_computergt ias_convert cgns bump.cgns stp
bump.stp

• Loading reference data libraries...
• cgns_types.stp from 'the reference data path'
• ear_library
• cgns_types(v1r1s1)
• property_units
• ..., Density, ...
• common_property_types.stp from 'the reference
  data path'
• ear_library
• common_property_types(v1r1s1)
• class_of_property
• ..., density, ...
• common_unit_types.stp from 'the reference data
  path'
• units_library
• common_unit_types(v1r1s1)
• derived_SI_unit...
• ..., kg/m3, ...
• ...done loading reference data.

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Import of CGNS-file bump.cgns 2(2)

• Importing bump.cgns
• Reading CGNS model from file bump.cgns (CGNS file
  version 1.10)
• Base 1(1) "Base" is of 3D-topology in 3D-space
• Zone 1(1) "Zone 1"
• Found 1 solution in Zone 1
• Request 'Density' property_units from
  'cgns_types(v1r1s1)'
• ear_library 'common_property_types(v1r1
  s1)' 135304c
• dimensionality 1352e50
• class_of_property_reference 13502b8
• property_variable 1350e68
• units_library 'common_unit_types(v1r1s1
  )' 1353050
• derived_SI_unit_reference 1353d5c
• property_units 1350390
• Result 13503a4
• Reading block 1 (1)...Done.
• Time for import 4.65 seconds
• Exporting bump.stp

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The Resulting EAR-model STEP-file

• 1EAR_MODEL('bump.cgns',('A CGNS
  model'),50,())2CASE_REPRESENTATION(,('bump.c
  gns'),1,51,52,())3PART_OF_CASE(2,(0.,1.),
  ,())
• 4PART_RESULT_SET(3,7)5PROPERTY_OF_STRUCTU
  RED_BLOCK_DOMAIN_AT_COMPONENTS(,,4,61,(6))
  6PROPERTY_OF_STRUCTURED_BLOCK_3D_COMPONENTS(,.EL
  EMENT_PROPERTY.,62,,((((...)))))
• 7PROPERTY_UNITS(8,(10))8PROPERTY_VARIABLE
  ('Density',('Static density'),9,('Density'))9
  CLASS_OF_PROPERTY_REFERENCE(,,,,,'density',1
  1,21) 10DERIVED_SI_UNIT_REFERENCE(,,,,'kg/
  m3',12,22)
• 11EAR_LIBRARY_REFERENCE('common_property_types'
  ,'v1r1s1',31)12UNITS_LIBRARY_REFERENCE('commo
  n_unit_types','v1r1s1',32)

/ The EAR-model core / / The Density
result set / / The Complete Density
property definition / / The Dictionary
references with local copies pointed out /
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Presentation Topics

• Overview of IAS-environment and the EAR-model
• A business case example of a CAE analysis
• An Integrated Analysis System - IAS
• The Engineering Analysis Results model EAR
• The EAR-based IAS environment _at_ Volvo Aero
• Demo run CGNS-file to STEP/P21-file mapping
• Concluding remarks
• Q A

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Concluding remarks

• Business driven bottoms-up approach
• The IAS-environment at Volvo Aero is in
  productive use
• Supporting fatigue simulations - ANSYS to CUMFAT
  to MSC/Patran
• Collaborations
• Conducting the Volvo Group project Future
  Engineering Environment
• The AP237 work of ISO TC184/SC4 WG3/T9
  Engineering analysis
• ENHANCE / COSCAL (COmmon principleS for
  CALculation)
• Current development focus for the IAS-environment
• Scaling up deployment (!)
• Migration of a present results interpolation
  algorithms into tsint3d
• Extend tool support CGNS-export, Fluent,
  VolSol, Nastran, OpenDX etc
• Near future work
• Publication of the EAR-model and the deployment
  experience within IAS
• Extended deployment within the Volvo Group
• Deployment outside of Volvo within up-coming
  collaboration projects

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Presentation Topics
Questions ?

• Overview of IAS-environment and the EAR-model
• A business case example of a CAE analysis
• An Integrated Analysis System - IAS
• The Engineering Analysis Results model EAR
• The EAR-based IAS environment _at_ Volvo Aero
• Demo run CGNS-file to STEP/P21-file mapping
• Concluding remarks
• Q A