3d-cad - mdxmdx2.plm.automation.siemens.com/sites/default/files... · 3d-cad is an easy to use,...
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![Page 1: 3D-CAD - MDXmdx2.plm.automation.siemens.com/sites/default/files... · 3D-CAD is an easy to use, full-featured solid modeler tightly integrated into the STAR-CCM+ product (Sketch based)](https://reader033.vdocuments.net/reader033/viewer/2022042409/5f25e3ea9d460916ad0dfab2/html5/thumbnails/1.jpg)
3D-CAD
김응주 장창제
![Page 2: 3D-CAD - MDXmdx2.plm.automation.siemens.com/sites/default/files... · 3D-CAD is an easy to use, full-featured solid modeler tightly integrated into the STAR-CCM+ product (Sketch based)](https://reader033.vdocuments.net/reader033/viewer/2022042409/5f25e3ea9d460916ad0dfab2/html5/thumbnails/2.jpg)
CAD Clients 3D-CAD - Create geometry (Sketch, Surface modeling, Solid modeling) - Modify imported geometry - Editing incomplete CAD models Parameter Design
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CAD Clients
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CAD Clients: Update existing “STAR-CAD” products to link more tightly with STAR-CCM+.
Use new technologies developed for CAD clients to move complex geometries from the CAD environment to STAR-CCM+.
We have full control over additional data (Assembly structure, names, materials, etc.) to transfer.
Eventually we can extend this to a full bidirectional link between STAR-CCM+ and CAD.
High quality.
Fast and robust geometry transfer.
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3D-CAD
![Page 7: 3D-CAD - MDXmdx2.plm.automation.siemens.com/sites/default/files... · 3D-CAD is an easy to use, full-featured solid modeler tightly integrated into the STAR-CCM+ product (Sketch based)](https://reader033.vdocuments.net/reader033/viewer/2022042409/5f25e3ea9d460916ad0dfab2/html5/thumbnails/7.jpg)
3D-CAD is an easy to use, full-featured solid modeler tightly integrated into the STAR-CCM+ product (Sketch based)
Uses include:
- Create a geometry
- Modify imported geometry
- Create shapes for mesh refinement
or reporting surfaces.
- Editing incomplete CAD models
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Sketch
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Sketching
- Points, Lines, Boxes(axis aligned or arbitrarily oriented),
circles, circular arcs , ellipses, splines
Constraints acting on:
- Points fixing location
- Lines axis alignment, parallel, perpendicular
- Circles concentric
- Adding invisible construction lines allows constraining other
sketch objects
- A point and a line
midpoint, coincidence
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Sketch patterning
Spline improvements
- Tangent constraints
- Modification of spline control grid and tangency
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Given any set of selected sketch primitives, automatically offset the primitives inward, outward, or both ways.
Offsetting can automatically change topology of the sketch by merging or collapsing features.
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1. Select edge, face, or sketch primitive not part of current sketch
2. “Convert” selected primitive by projecting to current plane.
3. Use new sketch to generate a new feature.
4. Full associativity is maintained from the 1st sketch to the 2nd.
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Structure modeling
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Extrude and Extrude cut
- Normal to sketch or in user specific direction
Revolve and revolve cut
- Revolution axis is defined by the construction line of the sketch
Duplicate, translate, rotate, scale
Boolean
- Intersect, unite, subtract, extract external or internal volume, imprint
Offsets, Patten, Fillets, Chamfers
Complex lofting/hole filling
3D-CAD Spline editing
Extrude an open contour to form a surface
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Surface modeling:
- Delete faces
: Remove any problematic/invalid faces or convert solid bodies to surfaces.
- Fill holes: Select edges, faces, or body defining a closed loop
(not necessarily planar) and fill with a BREP surface.
- Knit bodies: Knit one or more sheet bodies together to form a solid body.
- Extrude/Revolve/Loft/Sweep open contours
: Create surfaces by applying generative features to open sketch contours.
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Bring imported CAD parts directly into 3D-CAD
Additional previews during generative solid modeling operations
Fillet previews
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All necessary features have live previews during editing.
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New boolean operation to slice a body by a plane, face, or surface.
Options to keep one side or both.
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Generate Sheets - All existing generative operations will be extended to surface modeling - Extrude, Revolve, Sweep, Loft - Can be applied to open or closed contours - Use to generate surface geometry directly from sketches
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Conformal Loop Matching - When closed/periodic surfaces are split, ensure conformality of split points across imprinted parts. - Necessary for conformal, aligned meshing
Improved Curve Segmentation - Generate equidistant points along a complex surface. - Necessary for aligned, directed meshing.
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Two different tolerance modes (“Tolerant Faces” and “Tolerant Edges”) have been added to boolean operations and imprints.
Development was done in response to incomplete boolean unite operations on complex electric motor applications.
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Edit imported CAD part in 3D-CAD
- Maintains assembly hierarchy
Import multiple, closed, 3D curves from .csv
Show error status for features which previously failed.
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Delete Faces - Remove invalid faces - Manually defeature geometry - Remove face to replace with more complex surface
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Create Sheets from Faces/Bodies - Extract faces from solids or other sheets - Use these faces as inputs to other solids or as reporting surfaces
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Fill Holes - Create faces missing from import - Recreate deleted faces (likely invalid) - Create surfaces with specified continuity at edges
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Degenerate original face
Select and delete face, forming a sheet body
Fill hole and stitch together to reform solid
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New feature to remove faces and simplify a model.
Blends
Holes
Protrusions
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Defeature
- Remove holes, fillets, etc.
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One click defeature tool to suppress features
Enhanced user-productivity Suppress unwanted features
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Parametric Design
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A design parameter is a variable used for defining model dimensions - They have a name and value associated with them - They can be changed outside the 3D-CAD environment
Outlet 1
Outlet 2
Inlet 1
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Create a design parameter called Valve Angle specifying valve rotation
Set the values as shown finish the edit panel by clicking on OK
Valve Angle resides in the Design Parameters folder as shown
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Take a look at the mesh scene
- It shows that two of the flow paths has automatically been opened by
the valve position.
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Unfold the tree 3D-CAD > 3D-CAD Model 1 > Design Parameters
Change the Valve Angle to 20.0 deg
- The appearing exclamation mark shows the need for an update of the
pipeline: Right click > Update
Recreate the volume mesh
- This updates the pipeline automatically
Outlet 1
Inlet 1
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Take a look at the mesh scene
- It shows that one of the flow paths has automatically been cut off by the valve position
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DEMO