Pat Cae Geom2
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Transcript of Pat Cae Geom2
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James FillonTerence SmithAdvanced Geometry Techniques With MSC PatranCAE Solid Modeling & More
MSC Software Confidential Enhanced Geometry TechniquesCAE Solid ModelingGeometric primitives creationGeometric boolean operationsMid-Surface extractionsSurface trimmingEdge blending (chamfer, constant radius etc)Create thin walled solidsFeature recognition/deletion/editingConvert sgm geometry to parasolidAuto update of cae data after solid editingRequires parasolid modeling licenses
MSC Software Confidential Enhanced Geometry TechniquesEnhanced Surface Modeling TechniquesOffsetting surfaces and curvesAdvanced trimmed surface editingAdding fillets / removing filletsSurface subtractionsEnhanced surface extension techniquesParametric surfaces
MSC Software Confidential CAE Solid ModelingGeometric Primitives
MSC Software Confidential CAE Solid ModelingGeometric Primitives
Cylinder and cone primitives canbe given an optional thickness dimension to create tubesMSC Software Confidential CAE Solid ModelingOn The Fly Booleans With Primitives
Automatic CAE update (mesh and lbcs) is on by default. The setting can be controlled through Preferences/Geometry.MSC Software Confidential CAE Solid ModelingAutomatic Mesh/LBC Update Control4/16/20126
MSC Software Confidential CAE Solid ModelingGeometric Booleans
Automatic CAE updateMSC Software Confidential CAE Solid ModelingCreate/Solid/Revolve
Previous versions of patran only allowed Create/Solid/Revolve for simple 3 and 4 sided (green) surfaces (iso-meshable solids)Tet-meshableorIso-meshableSolid TypesMSC Software Confidential CAE Solid ModelingCreate/Solid/Extrude
Tet-meshableorIso-meshableSolid TypesPrevious versions of patran only allowed Create/Solid/Extrude for simple 3 and 4 sided (green) surfaces (iso-meshable solids)
MSC Software Confidential CAE Solid ModelingEdit/Solid/Shell
Solid 1.1Carves out material up to thedefined wall thickness startingfrom the face selected.MSC Software Confidential CAE Solid ModelingEdit/Solid/Edge Blend
Constant RadiusorChamferSelect edges, all edges associated to a surfaceor all edges.
Constant RadiusChamferMSC Software Confidential CAE Solid ModelingEdit/Solid/Imprint
Solid 1Solid 2
Solid 1.1Solid 1.7Automatic mesh andlbc updateMSC Software Confidential CAE Solid ModelingExpedite high quality meshing with solid imprintingMatch parasolid faces to insure mesh congruency4/16/201213
MSC Software Confidential CAE Solid ModelingMid-Surface ExtractionsCreate/Surface/Midsurface
Allows for both automaticand manual creation of mid-surfacesMax t = 0.1The max thickness should be slightly larger thanthe max thickness of the solid.MSC Software Confidential Mid-surface Extraction: AutomaticIn the automatic mode, the choice of the maximum thickness is important. This value is used to create specific mid-surfaces at/or under a specific thickness.Too large a thickness can produce very skewed surfaces. The mid-surfaces may not be in the wall of the solid selected or not look as expected.Too small a thickness may miss some contours or features created by varying wall thickness.The mid-surfaces created by this option are not always congruent. Additional surface editing may be required to ensure a congruent mesh (Edit/Surface/Sew).
MSC Software Confidential Mid-surface Extraction: ManualThe manual mode allows more control over the mid-surfaces one wishes to create.Manual mid-surface extraction works by selecting the two solid faces between which you want the mid-surface.
MSC Software Confidential Mid-surface Extraction: TrimmingMid-surface trimming allows the modification of common mid-surface protrusions or unwanted surface area
Imported solid model with gussetAutomatic mid-surface of the gussetGusset mid-surface after trimmingMSC Software Confidential Mid-surface Extraction: Trimming
Remove this extra sliver off of the gussetMSC Software Confidential Mid-surface ExtractionDuring automatic mid-surface extraction, MSC Patran automatically converts (refits) non-Parasolid geometry to Parasolid geometry prior to creating the mid-surfaces.During manual mid-surface extraction, MSC Patran does not automatically convert (refit) non-Parasolid geometry to Parasolid geometry. The user needs to convert non-Parasolid geometry to Parasolid geometry via Edit/Solid/Refit prior to creating the mid-surfaces.
MSC Software Confidential Direct Mid-Surface MeshingMid-Surface MesherSingle step creation of a mid-surface mesh on a solid partIntended for bent sheetbodyDoes not work for tee type junctionsExamples of parts that can be mid-surfaced meshed
MSC Software Confidential
Mid-Surface Mesher (pre-release)
Tools/Pre-Release/Midplane Meshgeometrymid-surface meshMSC Software Confidential CAE Solid ModelingFeature RecognitionRecognize geometric entities such as holes, chamfers and blends as features for easy editing and deleting
MSC Software Confidential CAE Solid ModelingAutomatic Feature Recognition
Automatically recognize holes chamfers and edge blends
Features are highlighted and stored in the db
MSC Software Confidential CAE Solid ModelingInteractive Feature Recognition
Select solid faces or edges
MSC Software Confidential CAE Solid ModelingDeleting Recognized Features
Select features to be deleted
MSC Software Confidential CAE Solid ModelingEditing Features
MSC Software Confidential CAE Solid ModelingShow Feature Attributes
Select features to show
MSC Software Confidential 28Advanced Surface Modeling Techniques With MSC Patran MSC Software Confidential Enhanced Surface/Curve ModelingCreate/Curve/Offset
Offset direction can be reversedConstant OffsetOffset Direction VectorMSC Software Confidential Enhanced Surface/Curve ModelingCreate/Curve/Offset
The offset direction for a straight curve is ambiguous. Therefore the specification of a direction vector is necessary MSC Software Confidential Enhanced Surface/Curve ModelingCreate/Curve/Offset
= 0.0 = 1.0
Variable offset based on parametric curve locations. (default = 0 and 1)MSC Software Confidential Enhanced Surface/Curve ModelingCreate/Curve/Offset
= 0.5 = 1.0Variable offset based on parametric curve locationsMSC Software Confidential Enhanced Surface/Curve ModelingCreate/Surface Offset
Option for selecting a guidingsurface for surface normals when offsetting multiple surfaces.MSC Software Confidential Enhanced Trimmed Surface EditingEdit/Surface/Add Fillet
MSC Software Confidential Enhanced Trimmed Surface EditingEdit/Surface/Edge: Remove EdgeOption for specifying specificedges to remove or all edgesshorter than the supplied minimum edge length
MSC Software Confidential Enhanced Trimmed Surface EditingEdit/Surface/Edge: Add Edge
MSC Software Confidential Enhanced Trimmed Surface EditingEdit/Surface/Edge: Replace Edge
MSC Software Confidential Enhanced Trimmed Surface EditingEdit/Surface/Remove VertexRemove a vertex from a trimmed surface Allows for user control for modifying all associated surfaces or selected surfaces
MSC Software Confidential Enhanced Trimmed Surface EditingEdit Surface Subtract
Surface 1Surface 2MSC Software Confidential Enhanced Surface Editing: ExtensionEdit/Surface/ExtendIntersection of two surfacesExtend one surface to anotherIntersection of surface and curveIntersection of surface and planeIntersection of surface and pointPercentage of u and vFixed length
Option to edit all associated surfaces or selected surfaces
MSC Software Confidential Enhanced Surface Editing: ExtensionEdit/Surface/Extend: Intersection of two surfaces
Surface 1.3Surface 4.3MSC Software Confidential Enhanced Surface Editing: ExtensionEdit/Surface/Extend: One surface to another
Surface 1Surface 3.4Surface 4Surface 5Option to break the intersectingsurface at the line of intersectionMSC Software Confidential Enhanced Surface Editing: ExtensionEdit/Surface/Extend: Intersection of surface and curve
Surface 1.3Surface 2.2MSC Software Confidential Enhanced Surface Editing: ExtensionEdit/Surface/Extend: Intersection of Surface and plane
MSC Software Confidential Enhanced Surface Editing: ExtensionEdit/Surface/Extend: Intersection of surface and a point
Point does not have liein the plane of the surfaceMSC Software Confidential Enhanced Surface Editing: ExtensionEdit/Surface/Extend: Percantage of u and v
100% extension from u=150% reduction from v=1MSC Software Confidential Enhanced Surface Editing: ExtensionEdit/Surface/Extend: Fixed Length
MSC Software Confidential Parametric Surfaces (P-Shapes)Parameterized Shapes:Create & edit based on common geometric dimensions (diameter, radius, height, start angle, etc.)Mesh + apply LBCs same as other MSC.Patran surfacesParameterized shape parameter definitions are stored in the MSC.Patran database for parametric design & rapid editingFEM updated automatically when geometric parameters are modified
4/16/201248
MSC Software Confidential Parametric Surfaces (P-Shapes)4/16/201249
MSC Software Confidential Thank You!!MSC Software Confidential