ANSYS ICEM CFD / AI*Environment v.11ANSYS ICEM CFD / AI*Environment v.11část 1/4část 1/4

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ANSYS ICEM CFD / AI*Environment v.11ANSYS ICEM CFD / AI*Environment v.11CAD Import and FunctionsCAD Import and Functions

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• AI*Environment has 2 primary means of obtaining geometry:– CAD model import, including a design modeler in Workbench– Geometry creation

• Imported solids are converted to surfaces– A “Body” within AI*E is simply a closed set of surfaces.

Geometry in AI*EnvironmentGeometry in AI*Environment

• It is possible to create complicated geometries, but most users import from CAD

This Jet engine model with functioning thrust reversers was built with AI*Environments geometry tools

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Wide CAD SupportWide CAD Support

I-DEASI-DEAS

SolidWorksSolidWorks

Pro/EngineerPro/Engineer

CATIACATIA

• 3rd Party Cad– STEP/IGES– ACIS– Parasolid– DWG/DXF– IDI– GEMS

• Faceted Data– STL– VRML– NASTRAN,

PATRAN, ANSYS, LS-DYNA

• Formatted Point Data

• Catia V5 Integration

• Direct CAD interfaces/Geometry import- Parametric meshing

UnigraphicsUnigraphics

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PersistencePersistence

Link to active CAD Geometry

When a model is changed in Pro/E, or by the Design Modeler, the model can be updated in ANSYS ICEM CFD

Parametric changes in Pro/E

Advanced mesher setup, including Part names, mesh parameters, boundary conditions, etc are tied directly to entity names.

These are persistent from one design change to the next

Mesh parameters set up in ANSYS ICEM CFD

Update Geometry in ANSYS ICEM CFD

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– Associative with CATIA-V5 model, mesh responds to parametric change in CATIA

– Created mesh can be used with all Catia-V5 based applications

– Same tool for CFD and Structural analysis

– CFD Gateway

Geometry Model in Catia V5

CATIA V5 Based technologyCATIA V5 Based technology

ANSYS ICEM-CFD/AI*Enviroment v.11ANSYS ICEM-CFD/AI*Enviroment v.11Workbench IntegrationWorkbench Integration

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11.0 Workbench integration11.0 Workbench integration

• Advanced Meshing in Simulation• GTM file for CFX Pre on Project Page • Improved Project Page Handling • Commonized CAD licensing

Represents integration of tool in Workbench

Represents communication directly between products

ANSYS

CFX

ICEM CFD

Workbench

CFX

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11.0 Workbench Meshing11.0 Workbench Meshing

Workbench Meshing • Framework for providing

common meshing tools for any application inside Workbench

• ICEM CFD uniform quad/tri meshing technology is now exposed natively in Simulation

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External Solver

Workbench Geometry HandlingWorkbench Geometry Handling

3rd Party CADIGES, ACIS, DWG, STEP…

Faceted DataSTL, Nastran,

Patran, VRML…

ICEM CFDAdvanced

Meshing Tab

Direct CADCATIA, Pro/E, I-DEAS,

UG, SolidWorks…

As always, you can import geometry

directly into ICEM CFD

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External Solver

Workbench Geometry HandlingWorkbench Geometry Handling

Faceted DataSTL, Nastran,

Patran, VRML…

ICEM CFDAdvanced

Meshing Tab

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Geometry Engine

Direct CADCATIA, Pro/E, I-DEAS,

UG, SolidWorks…

3rd Party CADSTEP, Parasolid

Or use the Workbench CAD

connection Products

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Workbench Geometry HandlingWorkbench Geometry Handling

Faceted DataSTL, Nastran,

Patran, VRML…

ICEM CFDAdvanced Meshing Tab

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Geometry Engine

Direct CADCATIA, Pro/E, I-DEAS,

UG, SolidWorks…

3rd Party CADSTEP, Parasolid

Design Simulation

MesherThe same interfaces for

all ANSYS products

• Common CAD connection licenses– 1 Connection product per CAD system for all ANSYS Products– Direct to ANSYS ICEM CFD or thru Workbench

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Workbench Geometry HandlingWorkbench Geometry Handling

Faceted DataSTL, Nastran,

Patran, VRML…

ICEM CFDAdvanced Meshing Tab

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Geometry Engine

Direct CADCATIA, Pro/E, I-DEAS,

UG, SolidWorks…

3rd Party CADSTEP, Parasolid

Design Simulation

MesherDesign Modeler

• Use design modeler to repair/simplify CAD• Bi-directional parametric link to CAD

ANSYS ICEM CFD / AI*Environment v.11ANSYS ICEM CFD / AI*Environment v.11GeometryGeometry

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Model Diagnosis and RepairModel Diagnosis and Repair

Build topology function• Curves are extracted from surface model• Enables model diagnosis• Curves form basis for

geometry repair

Imported CADImported CAD

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Geometry MergingGeometry Merging

• Automatic merging of multiple CAD parts into a single model– Hybrid Approach

• Direct CAD• Translated CAD• Faceted Data

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Geometry RepairGeometry Repair

–Automated tools for:• Evaluating CAD integrity• Extracting surface topology (curves,

points, etc.)• Repair of gaps, closing of edges• Simplifying data

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Repair•Build Diagnostic Topology•Close Hole•Remove Hole•Surface retrimming/matching •Surface extension•Un-trim surface•Split by curvature•Modify surface normals•Bolt hole detection•Button detection•Fillet detection

Curve creation•From points•Arc/Circle•Surface param•Intersection•Surface projection•Segmentation•Concatenation•Surface Boundary•Modify curve tools

Geometry HandlingGeometry Handling

Surface editing•Surface from curves•Driven surface•Swept surface•Revolved surface•Offset surface•Midsurface•Adjust thickness•Lofted surface

Body definitions• From connectivity• Material PointPoint creation

•From screen•Explicit•Offset•Center-point•Between points•Endpoints•Intersection•Along curve•Projection tocurve•Projection to surface

•Curtain surface•Surface trimming

•Merged surface

•Shrink wrapped surface

•Standard Shapes

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Geometry HandlingGeometry Handling

• Feature detection– Hole detection/removal– Button detection– Fillet detection

• Geometry repair– Surface reapproximation– Surface untrimming

Example: auto-detect buttons

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Geometry HandlingGeometry Handling

• Match edges– Automatic– User definition– One command

• Close holes• Remove holes• Modify Surface normal• Model diagnostic

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MidsurfaceMidsurface

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Midsurface/Seam WeldingMidsurface/Seam Welding

• Semi-Automatic Tool to close gaps after midsurfacing• Preview/Edit automatic extensions• New methodology extends surfaces for robust welding

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Transform Geometry•Translate•Rotate•Mirror•Scale•Translate & Rotate

•Three Points•Curve to Curve

Faceted Curves•Convert from B-spline•Create Curve•Move Nodes•Merge Nodes•Create Segment•Delete Segment•Split Segment•Restrict Segments•Move to new/existing Part

Geometry HandlingGeometry Handling

Faceted Surfaces•Convert from B-spline•Coarsen surface•Create surface•Merge Edges•Split Edges•Swap Edges•Move Nodes•Merge Nodes

Faceted Tools

•Create Triangles•Delete Triangles

•Split Triangles

•Restrict Triangles

•Move to new/existing Part

•Merge Surfaces

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Faceted GeometryFaceted Geometry

• Faceted tools– Easier to access– Powerful tools for improving Scan data

• Eg. Unusable model with 1500k poor triangles, holes, overlaps, etc. to 400k meshable model

ANSYS ICEM-CFD/AI*Enviroment v.11ANSYS ICEM-CFD/AI*Enviroment v.11Shrink WrappingShrink Wrapping

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The Demo ModelThe Demo Model

The Stats

3.7 million line Nastran File

1000+ parts

Estimated at 800000 CAD surfaces

Internal CAD also

If 1 surface uses 5k of RAM then ‘true CAD model’ = 4 Gigs to load the part!

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The Demo ModelThe Demo Model

Automatically Shrink Wraped• No Shadowing effects• Final Shrink wrap can be used as

simplified geometry• Try with the Hexa Core technology

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The Demo ModelThe Demo Model

• Respects surface sizing info• Mesh that is generated can be used as surface

mesh– High quality