2006 Abaqus FSI post-processing by CEI EnSight

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Presentation given by Darin McKinnis at ABAQUS conference in 2006, leaning on material presented by Clinton Stone of ESTEQ (MSC-Africa) at CEIVIZ2006 in Orlando, Florida.

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  • Pov-ray now available in EnSIght Standard, no longer requires EnSight Gold (2013)
  • 2006 Abaqus FSI post-processing by CEI EnSight

    1. 1. Visualization of Coupled FEA, CFDand Multi-body DynamicsSimulations using EnSightDarin McKinnisComputational Engineering International (CEI)Clinton StoneMSC-Africa Simulating Reality (Pty) LtdPaul Adams ScientificVisualization LeadERDC MSRC - Vicksburg, MS
    2. 2. • Most CFD codes already handle basic FSI• Normally limited to Rigid body boundary motion• Mostly limited to rigid body motion by a prescribed function• Some packages include a 6DOF dynamics model to handleproblems like store separation• Normally FSI requires extensive amounts of remeshing• Most FEA codes already handle basic FSI• Usually very limited in CFD ability (e.g.. Laminar Flow Only)• Usually limited to relatively small structural displacements• Primarily used to add effects of fluid mass/inertia on structuraldynamics response (e.g. Seismic analysis of dams)Description of CAE Coupling Technology
    3. 3. Current CFD ImplementationMoving rigid wallswith remeshingMoving rigid wallswith overlappingmeshes & 6DOFdynamics model
    4. 4. Description of certain FSI Technology• Certain codes are dedicated to handle FSI• E.g. MSC.Dytran, LS-Dyna, AutoDyn• Very capable in terms of non-linear structural dynamics• Normally limited in terms of CFD capability• Explicit codes are mainly suited toshort-duration events• Normally use the ALE approach wherethe structure & fluid share commoninterface nodes• Euler mesh is “morphed” as the structure deforms• Limited to mostly relatively small displacements• Focus is usually on thestructural response• Some codes have more powerfulGeneral 3D Coupling
    5. 5. • Despite the progress already made in FSI &FEA/MDB coupling, the tools are either ratherlimited or very specialized for specific applications• Short Duration, Airbags, explosions, bird-strike, linear flexibility…• A growing need exists to make multi-physicscoupling more general and powerful• One solution is to combine the strengths of multipleCAE tools using technology such as MpCCIDescription of CAE Coupling Technology
    6. 6. MpCCI: Description and MotivationMesh-based parallel Code Coupling Interface.• Handles data communication between two or moresimulation codes• Supports non-matching grids and handles data interpolation(conservative and non-conservative) between the grids.• Supports parallelization of the codes.• Includes an intuitive GUI for setup of the simulation• Developed by:Fraunhofer Institute for Algorithms and Scientific Computing SCAI• See: http://www.mpcci.org.
    7. 7. MpCCI: Description and Motivation• Current MpCCI Technology Partners• MSC.Software• CD-adapco• Abaqus• Ansys• Fluent• CEI (EnSight)• Others…• MpCCI Code Support (v 3.0.x)ABAQUS (V 3.0.3 Dec 2004)ANSYS (V 3.0.3 Dec 2004)Fluent (V 3.0.3 Dec 2004)StarCD (V 3.0.3 Dec 2004)Permas (V 3.0.4 planned April 2005)RadTherm (V 3.0.4 planned April 2005)CFX (V 3.0.5 planned later 2005)Marc & Nastran (V 3.0.5 planned Q3 2005)
    8. 8. Other MpCCI Technology ProjectsDamping of piezo elements StarCD–ANSYSAero-elastic in aircraft design Flower–NastranCabin acoustic in aircraft ACTI3S–NastranPolymer mixers StarCD–PermasAirbag gas generator simulations CFX–MarcAquaplaning computations Numeca–MarcVibration in pipeline systems Fluent–ANSYSRubber gaskets Fluent–ANSYS/ ABAQUSWind loads in civil engineering CFX–InHouseAerodynamics in automotive design StarCD–Nastran/ ABAQUSBiomechanical simulations StarCD–Mecano
    9. 9. Presentation Overview• Introduction & Trends in the CAE Industry• Discussion of CAE Coupling Technologies• Fluid Structure Interaction (FSI)• Multibody Dynamics & Finite Element Analysis (MBD / FEA)• Mesh-based parallel Code Coupling Interface (MpCCI)• Postprocessing Challenges• Technology Demonstrator Projects• Conclusion
    10. 10. Postprocessing Challenges• Any form of multi-code coupled simulationhas problems in terms of results visualization• Each CAE package is designed to onlypostprocess its specific results• Viewing the different result domainsseparately significantly reduces theengineering value of the simulation• Often sequentially coupled solutions areconducted with very different time scales
    11. 11. Postprocessing Challenges• EnSight is unique in its ability to postprocesscoupled simulation results.• These can either be:• Directly coupled with co-simulation or MpCCI• Sequentially coupled using tools like iSight-FD or Fiper• Manually coupled solutions using loads transfer• Decoupled simulations of separate physics portions of a problem• Ensight features required for this are:• Multi-code readers• Results Timeline manipulation• Keyframing & Viewport Tracking• Multiple Case Support• Case Mapping (Pressure from CFD to FEA)• Global model repositioning (Frame Mode)
    12. 12. Presentation Overview• Introduction & Trends in the CAE Industry• Discussion of CAE Coupling Technologies• Fluid Structure Interaction (FSI)• Multibody Dynamics & Finite Element Analysis (MBD / FEA)• Mesh-based parallel Code Coupling Interface (MpCCI)• Postprocessing Challenges• Technology Demonstrator Projects• Conclusion
    13. 13. Technology Demonstrators• The following examples will illustrate the useof EnSight to postprocess coupledsimulations• These examples highlight all of the methodspreviously discussed for coupling
    14. 14. Technology DemonstratorsSequentially Coupled MBD & FEA simulationHelicopter Crash Investigation
    15. 15. Technology DemonstratorsSequentially Coupled MBD & FEA simulationPickup Truck Crash Investigation
    16. 16. Technology DemonstratorsSequentially Coupled MBD & CFD simulationAircraft flap & air-brake deployment
    17. 17. Technology DemonstratorsSequentially Coupled MBD & CFD simulationAircraft flap & air-brake deployment
    18. 18. Coupled CFD & FEA simulation using MpCCITechnology DemonstratorsAutomotive Manifold
    19. 19. Technology DemonstratorsCoupled CFD & FEA simulation using MpCCIFlexible Membrane Flutter
    20. 20. Technology DemonstratorsCoupled CFD & FEA simulation using MpCCIBiomedical Heart-Valve
    21. 21. Technology DemonstratorsBi-Metallic Strip Flow RestrictorCoupled CFD & FEA simulation using MpCCI
    22. 22. Technology DemonstratorsCo-Simulation coupling with MBD & CFD simulationDragline Dynamics & DiggingMSC.ADAMS solves thedynamics of the systemMSC.Dytran solves tosystem / soil interaction
    23. 23. Technology DemonstratorsCo-Simulation coupling with MBD & Non-linear FEABungee Jumper
    24. 24. Technology DemonstratorsSloshing Tank Test rigCo-Simulation coupling with MBD & CFD
    25. 25. Technology Demonstrators - Povray !Sloshing Tank Test rigCo-Simulation coupling with MBD & CFD
    26. 26. Technology Demonstrators - Povray !Flow around bridge footingFlow simulation vs experimental results
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