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I-DEAS and ADINA in non-linear structural Finite Element and CFD-analysis Presented by Dr. Ulrich Heck PowerPoint Presentation
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I-DEAS and ADINA in non-linear structural Finite Element and CFD-analysis Presented by Dr. Ulrich Heck - PowerPoint PPT Presentation


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Dr. Heck. Consulting and Engineering. Dr. Heck Consulting and Engineering and Adam Hodgson Engineering:. I-DEAS and ADINA in non-linear structural Finite Element and CFD-analysis Presented by Dr. Ulrich Heck. Dr. Heck. Consulting and Engineering. Presentation UG-User 2004

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Presentation Transcript
slide1

Dr. Heck

Consulting and

Engineering

Dr. Heck Consulting and Engineering and

Adam Hodgson Engineering:

I-DEAS and ADINA in non-linear structural

Finite Element and CFD-analysis

Presented by

Dr. Ulrich Heck

Dr. Ulrich Heck

slide2

Dr. Heck

Consulting and

Engineering

Presentation UG-User 2004

Background

The FE-solver program ADINA will be embedded into NX NASTRAN to become the non-linear solver for structural analysis

Our business

Our needs

Our tools

Our experience

Dr. Ulrich Heck

slide3

Dr. Heck

Consulting and

Engineering

Structural Analysis

CFD (Computational Fluid Dynamics)

O-Ring

Compression

Karman vortex street

Heat Transfer

FSI (Fluid-Structure-Interaction)

Frictional Heating (Brake)

Vortex induced vibrations

Our business: Engineering services

Dr. Ulrich Heck

slide4

Dr. Heck

Consulting and

Engineering

Our needs – customer’s demands

Our mission :

Quickly achieve high quality results for very complex problems

1. Initial task: Calculate effort for meshing and solving the problem

  • Meshing Needs
  • Time for meshing ->more a craft than an art
  • Generating high quality meshes from poor CAD-data (imported models)
    • Various options to achieve the result:
      • Optimise/repair the CAD data or mesh on existing CAD data
      • Manual meshing, merging models etc.
  • Reliable and robust
  • Solver Needs:
  • One CAE-Solvers for a wide range of complex problems
  • Reliable and robust
  • Universally applicable methods
  • Solving in reasonable time without super computer

Dr. Ulrich Heck

slide5

Dr. Heck

Consulting and

Engineering

Flow with conduction

Flow with radiation

Thermo-mechanical coupling

  • Heat transfer
  • Conduction
  • Radiation
  • Convection

ADINA (FEM)

Finite Volume

CFD-Solver

Fluent

Our tools-Solver

  • CFD
  • Complex turbulent
  • Highly compressible (shocks)
  • Turbulent heat transfer
  • Multiphase
  • Large problems (turbulent 2 Mio Cells)
  • Non-lin structural
  • Contact
  • Nonlinear Material
  • (plastics, rubber)
  • Large (plastic) strain large displacement
  • CFD
  • laminar
  • turbulent
  • Transient/ steady state
  • moving meshes
  • moderate size
  • FSI
  • Transient, highly
  • coupled
  • Static flow induced large deformation or strains

Dr. Ulrich Heck

slide6

Dr. Heck

Consulting and

Engineering

  • I-deas is used for:
  • All CAD-Modelling including geometry import and repairing poor CAD models
  • Meshing capabilities of I-deas
    • Mapped/Free Meshing
    • Section Meshing
    • Manual Meshing
  • All meshes for ADINA (structural, CFD, heat-transfer, FSI)
  • Special CFD mesh features are
  • used for complex CFD (Fluent) ->
  • TGrid:
  • Use I-deas hexahedral or surface mesh (triangular),
  • Merge mesh regions for hybrid “viscous” meshing
  • Mesh tetrahedral volume in TGrid

Our meshing tools

Dr. Ulrich Heck

slide7

Dr. Heck

Consulting and

Engineering

Tools conclusion

  • Quickly achieve high quality results for very complex problems
  • I-deas
    • Focal tool for CAD-modelling and meshing
    • Covers our over all needs for meshing
    • Only high level CFD modelling demands other grid generators
  • ADINA
    • Covers our needs for a wide spectrum of problems
    • One system to solve this wide range of problems

ADINA/I-deas in combination are the core tools for our daily work

Dr. Ulrich Heck

slide8

Dr. Heck

Consulting and

Engineering

  • Present system:
  • TRANSOR is ADINA/I-deas interface
  • Is based on universal files
  • Runs ADINA in background
  • Imports results files via universal file translator

ADINA/I-deas/NX-Nastran

Our experience: 6 Years with ADINA/I-deas

  • needed improvements in NX-NASTRAN:
  • Simplified transfer of geometry information (e.g. element orientation contact surfaces, 2d models…)
  • Post processing: direct display results
  • Ease of use
  • Long term desirables:
  • Easier adaptive meshing
  • Topology optimisation ->
  • new CAD Model

Dr. Ulrich Heck

slide9

Dr. Heck

Consulting and

Engineering

Examples

  • Some examples similar to customer projects, pre-studies, own verification problems
  • Even if ADINA is a reliable, robust tool, setting up test cases is a must when working with new types of problems
    • Collect experience with the problem types
    • Check the feasibility (available models, hardware power etc.)
    • Check influence of modelling parameters (grid, time stepping etc.)
    • improve quality of results: Compare numerical results with experimental data
  • Advantages of ADINA System:
    • Universally applicable methods
    • ADINA suggest the correct solving method, element formulation etc. (e.g. automatically switches to u/p-formulation in case of incompressible material)
    • Gives hints if no solution is reached
  • ADINA user support
    • Excellent support
    • Works while you sleep
  • Never been disappointed by the results ADINA give us
  • Very satisfied customers !

Dr. Ulrich Heck

slide10

Dr. Heck

Consulting and

Engineering

Contact

Pressure load

Several Tests:

Pressure Test

Drop Test

Symmetry

Typical project time: 3-4 days

Including meshing, variants simulation, report

Structural example I

Technical problem:

Plastic tank under pressure

Dr. Ulrich Heck

slide11

Dr. Heck

Consulting and

Engineering

Structural example I

Tank problem:

plastic strain caused by increasing pressure (100 bar)

Dr. Ulrich Heck

slide12

Dr. Heck

Consulting and

Engineering

Structural example I

Machine: Dual Xeon 2.8 GHz, 4 GB-RAM, Linux,

Dell Precision 650

Dr. Ulrich Heck

slide13

Dr. Heck

Consulting and

Engineering

Structural example II

Tank problem:

Drop test

Conditions: 3m high, steel sphere of 500 gr

Fully dynamic analysis

Dr. Ulrich Heck

slide14

Dr. Heck

Consulting and

Engineering

Structural example II

Machine: Dual Xeon 2.8 GHz, 4 GB-RAM, Linux,

Dell Precision 650

Dr. Ulrich Heck

slide15

Dr. Heck

Consulting and

Engineering

Rigid Wall

O-Ring

Hyperelastic, incompressible

Structural example III

Plastic body

(elasto-plastic)

Dr. Ulrich Heck

slide16

Dr. Heck

Consulting and

Engineering

Structural example III

Dr. Ulrich Heck

slide17

Dr. Heck

Consulting and

Engineering

inflow

outflow

Slip wall

Flexible Structure

Rigid body

Slip wall

FSI-Benchmark

  • FSI-Benchmark:
  • Vortex induced vibrations,
  • Target:
  • tip displacement

Dr. Ulrich Heck

slide18

Dr. Heck

Consulting and

Engineering

  • Result: Exactly the same tip displacement referred in literature
  • Modelling time: 1 day for such a complex problem (FSI, large displacement, grid movement)

Ref: J. Steindorf "Partitionierte Verfahren

für Probleme der Fluid-Struktur Wechselwirkungen",

Thesis, Braunschweig, 2002, Germany

FSI-Benchmark

Dr. Ulrich Heck

slide19

Dr. Heck

Consulting and

Engineering

Rubber Wall:

Mooney Rivilin

(non-linear

incompressible)

Fluidchamber

Highly viscous oil

r =45 mm,

h= 70 mm

FSI: Hydromount Pre-Study

Hydromounts used in automotives to

damp vibrations caused by the engine mount

  • axissymmetric (2d)
  • Model: Highly nonlinear,
  • transient FSI, strong coupling
  • boundary condition
  • load:
  • - Sinusoidal displacement
  • - Amp.= 0.05 mm
  • Force F(t) ?

Dr. Ulrich Heck

slide20

Dr. Heck

Consulting and

Engineering

FSI: Hydromount Pre-Study

Resonance: here 650 Hz

Low-frequency displacement

Disp Mag=10

Dr. Ulrich Heck

slide21

Dr. Heck

Consulting and

Engineering

Frequencies 200-500 hz

Force [N]

t/T [-]

200 Hz

350 Hz

500 Hz

FSI: Hydromount Pre-Study

Time history

Dr. Ulrich Heck

slide22

Dr. Heck

Consulting and

Engineering

All Frequencies

Frequencies 200-500 hz

Max Force [N]

Max Force [N]

Frequency [hz]

Frequency [hz]

200 Hz

350 Hz

500 Hz

FSI: Hydromount Pre-Study

  • Physical effects have been proven
  • Good agreement of numerical and experimental distribution
  • max. Force =f (Frequency)
  • Results of the study will be published soon

Dr. Ulrich Heck

slide23

Dr. Heck

Consulting and

Engineering

FSI: Hydromount Pre-Study

  • 3d FSI: Transient, non-linear Material

Fluid model

Total model

Solid model

Dr. Ulrich Heck

slide24

Dr. Heck

Consulting and

Engineering

FSI: Hydromount Pre-Study 3d

Dr. Ulrich Heck

slide25

Dr. Heck

Consulting and

Engineering

Dr. Heck

Consulting and

Engineering

Conclusion

  • ADINA is a very powerful tool to solve nonlinear problems in
      • structural analysis,
      • heat transfer
      • CFD and
      • Multi physics
  • I-deas offers state of the art capabilities for an efficient
      • CAD-Modelling,
      • poor geometry repair of imported models
      • Meshing
  • ADINA/I-deas in combination are the core tools for our daily work
  • ADINA/I-deas cover our needs
  • Quickly achieve high quality results for very complex problems

www.dhcae.de

www.c-a-e.com

Dr. Ulrich Heck