msc.gs-mesher fully automated surface and solid mesher a ...msc.gs-mesher / value reduced time to...

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MSC.GS-MesherMSC.GS-Mesher

Fully Automated Surface and Solid Mesher

A Breakthrough in Meshing Technology

MSC.SoftwarePresented by:

Arnold Holler

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Typical Problem Areas:Small EdgesSliver SurfacesNon-congruent SurfacesGapsOverlap of SurfacesSurplus in detail, holes, etc.Tolerance Issues

Gap

Small Edge

Sliver Surface

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Accuracy of Mesh Depends Strongly on Geometry

Sliver surfaces, small details (e.g. holes), will result in too many and/or bad shaped elements.

It is not always possible to create high quality elements (e.g. surfaces have bad parameterization)

If Geometry is non-congruent, Mesh will in general be non-congruent too.

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Characteristics:Fully Automatic Process; User can Control Process.Automatic Model Cleanup !!!! Virtual TopologyOutside of Model and Inner Holes will be PreservedNo need for the User to make Geometry CongruentSupports Feature Angle and Edge (fillets)

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Current Version can Import:Parasolid V11.0BDF FilePro/Engineer

Future Version can Access:CATIA, SDRC, UnigraphicsAcisSTL file

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Example of “simple” surfaces with:

Gaps

Overlapping Surface

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

BMW Tunnel Model

Many Incongruent Surfaces

Many Sliver Surfaces, Gaps, Overlapping Surfaces

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Volkswagen Model

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Congruent Model Derived Automatically

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Idealized Model

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Mesh on Idealized Geometry

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

STL File / Door of Car

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Idealized Geometry

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Quad Mesh on Idealized Geometry

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MSC.GS-Mesher / SurfaceMSC.GS-Mesher / Surface

Conclusion

Create High Quality Mesh in a Short Time

User Time to Create Mesh is Minimal!

Works on:Geometry or FEMSTL file

Deals with gaps, overlapping surfaces, slivers

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MSC.GS-Mesher / SolidCharacteristicsMSC.GS-Mesher / SolidCharacteristics

Direct Access to Geometry

Geometry will remain in CAD system, so:No Accuracy IssuesNo Tolerance IssuesCAD System Knows “best” how to Evaluate the GeometryNo Need to Cleanup/Heal Geometry

Make High Quality MeshBetter Performance for Real Life ModelsAlmost no Training Required

Example:

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Why MSC.GS-Mesher / SolidWhy MSC.GS-Mesher / Solid

It is very Labor Intensive to “heal” Geometry

How to Mesh this “Piston” model in MSC.GS-Mesher?

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MSC.GS-Mesher / SolidMSC.GS-Mesher / Solid

Accessing this “piston” took 30 seconds. (It took 5 minutes to import it into MSC.Patran 2000 r2 )

No Cleanup needed. Piston appears as Solid and can directly be meshed.

Mesh can be Controlled:Several “Mesh Properties” can be Created and Assigned to Parts of the Model.

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Approach in MSC.PatranApproach in MSC.Patran

Translation of Geometry with Potential Loss of Accuracy, Tolerance issues, etc.

UG/Parasolid Geometry

Pro/E Geometry

CATIA Geometry

etc.

PatranGeometry

MSC.Patran

Mesher

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Future Geometry AccessFuture Geometry Access

UG/Parasolid Geometry

Pro/E Geometry

CATIA Geometry

etc.

PatranGeometry

Pro/E Geometry

CATIA Geometry MSC.GS-Mesher

MSC.Patran

Mesher

MSC Meshing Technology

Other CAD Geometry

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MSC.GS-Mesher / SolidMSC.GS-Mesher / Solid

Mesh ControlMaximum Element SizeMinimum Element SizeCurvatureTet4 or Tet10

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MSC.GS-Mesher / Engine BlockMSC.GS-Mesher / Engine Block

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MSC.GS-Mesher / SolidMSC.GS-Mesher / Solid

MSC.PatranTakes Very Long Time to Import into MSC.PatranMany Defects. Would take Many Days to Repair

MSC.GS-Mesher on HP X-class / 1GhZ / 1 GB ram/W2K

Takes 16 seconds to Access Geometry in MSC.GS-MesherTakes 130 seconds to create Tet4 meshTakes 330 seconds to create Tet10 meshUser time 0!

Table on Next page shows numbers provided by customer

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MSC.GS-Mesher / Engine BlockMSC.GS-Mesher / Engine Block

4 minutesUser + System Time35 Hours

0Elements to be repaired?

80,706Number of Nodes?

316,231 Tet elementsNumber of Tet Elements?

4 minutesSystem Time1 hours

0User Time34 hours

0Surfaces needed to be repaired

266

MSC.GS-MesherModel consists of 2,149 surfaces

Usual Technique

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MSC.Patran / Engine Block ErrorsMSC.Patran / Engine Block Errors

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MSC.GS-Mesher / SolidMSC.GS-Mesher / Solid

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MSC.GS-Mesher / SolidMSC.GS-Mesher / Solid

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MSC.GS-Mesher / Cylinder HeadMSC.GS-Mesher / Cylinder Head

3:30 hoursUser + System Time100 Hours

9Elements to be repaired

463,235Number of Nodes?

1,913,643 Tet elementsNumber of Tet Elements?

3:30 hoursSystem Time?

0User Time?

0Surfaces needed to be repaired

2,400

MSC.GS-MesherModel consists of 24,000 surfaces

Usual Technique

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MSC.GS-Mesher / ValueMSC.GS-Mesher / Value

Reduced time to marketMSC.GS-Mesher saves preprocessing time, which helps the customer bring their product to market in a shorter period of time

Ease of useMSC.GS-Mesher saves labor otherwise required to clean up CAD geometry, and therefore allows customers to produce their products for less cost

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MSC.GS-Mesher / FAQMSC.GS-Mesher / FAQ

Q. On which platforms does MSC.GS-Mesher run? A. At this moment, it only runs on Windows-NT and Windows-2000.

Q. Does MSC.GS-Mesher use licenses? A. Yes, MSC.GS-Mesher uses FlexLM licenses.

Q. Does MSC.GS-Mesher need a license to access ProE part files? A. Yes, a license for MSC.GS-Mesher is needed to access ProEpart files and also a ProE license is needed.

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MSC.GS-Mesher / FAQMSC.GS-Mesher / FAQ

Q. In order to access ProE parts, does ProE need to be installed? A. Yes, ProE 2000i2 needs to be installed and a ProE license is needed.

Q. How easy is it to install MSC.GS-Mesher such that it can accessProE files? A. The installation of MSC.GS-Mesher is very straightforward ( setup.exe ).

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MSC.GS-Mesher / FAQMSC.GS-Mesher / FAQ

Q. Can users control the mesh in MSC.GS-Mesher? A. Yes, one can specify a global edge length and add a mesh control to edges/faces/surfaces. "Meshing Properties" can be assigned to edges and faces.

Q. Does importing/accessing Parasolid files have an advantage above importing these into MSC.Patran? A. Limited, the result is the same.

Q. Can Loads/BCs be assigned in MSC.GS-Mesher? A. On purpose, MSC.GS-Mesher has been made a very fast and robust vertical application and it does an excellent job in meshing. LBC groups can be created and assigned to surfaces !!!! Groups.

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MSC.GS-Mesher / FAQMSC.GS-Mesher / FAQ

Q. How does MSC.GS-Mesher communicate with other applications (to create properties, materials, Loads/BCs, etc.) A. MSC.GS-Mesher can export the tetmesh, tria mesh and groups (sets) to an MSC.Nastran BDF or an MSC.Patrandatabase.

Q. Can MSC.GS-Mesher be used in "batch" mode? A. Yes it can and actually this will be very useful to remesh"modified" CAD geometry without any user interaction.

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Spasiboza Vnimanie !