STEP Support For Design And Analysis Processes

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STEP Support For Design And Analysis Processes

• PDES, Inc./NASA STEP Tutorial Session
• NASA Jet Propulsion Laboratory
• January 16, 2001

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General Comments

• Basis Of MSC.Software Products and Services
• Design Simulation And Engineering Analysis - CAE
• STEP Application Protocols Presently Supported
• AP203 (IS) Design Centric/Generally CAD
  Generated
• AP209 (DIS) Design And/Or Analysis Centric/CAD
  And/Or CAE Generated
• MSC.Software STEP Usage Philosophy - Two Basic
  Paradigms
• AP203 Usage Primarily A One-Direction Design
  Data Only Exchange
• Nominal Shape Associated Configuration
  Management/Product Structure Generated In CAD
  Product And Output As An AP203 File
• AP203 File Imported To Verify and Validate Design
  Using Analytical Simulation Processes
• AP209 Usage Bi-Directional Design Engineering
  Analysis Data Exchange
• Same Two Items Defined For AP203 Usage (AP209 Can
  Be Substituted For AP203)
• Idealized Shape Generated From And Associated To
  Imported Nominal Shape
• FEA Model And Analysis Results Generated
• Analysis Version/Product Structure Generated And
  Associated To Imported Design
• Entire Associated Design And Analysis Discipline
  Data (Nominal Shape, Idealized Shape, FEM/FEA,
  Version Control/Product Structure) Exported For
  Multi-Discipline Exchange And/Or For Repository
  Storage

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MSC.Patran (Version 9.5) STEP AP203 Coverage

• AP203 Import (See Backup Information For
  Specifics)
• CC2 through CC6 supported
• Minimum subset of CC1 supported
• Group based geometry supported
• Assemblies supported (assembly instances
  duplicated into individual MSC.Patran Groups)
• Assembly support available only for CC6 entities
• Names of geometric entities preserved using
  tagged CAD association
• AP203 Export (See Backup Information For
  Specifics)
• All MSC.Patran geometry entities supported
• Imported CC1 exported unaltered
• Names of geometric entities preserved using
  tagged CAD association
• Only CC2 and CC6 shape representations supported

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MSC.Patran (Version 9.5) STEP AP209 Coverage

• AP209 Import/Export (See Backup Information For
  Specifics)
• Geometry/Configuration Control ( AP203 Coverage)
• Nodes/Elements
• Materials
• Element Properties
• Loads and Boundary Conditions
• Load Cases
• Analysis Controls
• Results (Linear Statics, Normal Modes)
• AP203/AP209 translators Web downloadable
• http//www.mscsoftware.com/ (Select the following
  in order Products, Support, Product Updates
  MSC.Patran, Software and Online Documentation
  Updates, MSC.Patran 2000r2 (V9.5) STEP Translator
  (AP203/AP209))

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MSC Focus Today - AP209 Acceptance/Missionary Role

• AP209/IS Status Scheduled For 2001
• Translators Presently Offered By One CAD/CAE
  Vendor MSC.Software
• Theorem Solutions Developing CATIA/V4 AP209
  Translators (Lockheed, Boeing Electric Boat
  Funded In Support Of The PDES, Inc. Engineering
  Analysis Pilot Project)
• Why AP209?

Significantly Extended Source Of Enterprise Wide
Data
PDM

• CAE Vendor Product Neutral File
• Industry Standard Data Model For Corporate Wide
  Simulation Process Integration
• Single Design AND Analysis Data Source Within
  The Enterprise PDM
• Platform To Extend Engineering Analysis STEP
  Coverage Into All Analysis Disciplines (Part 107)
• Long Term Repository Critical To Aircraft Industry

CAD
CAE
AP209
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AP209 Added Value To The Design/Analysis Process

• Multi-Discipline Version Control
• Design controlled by designer (ddpd)
• Analysis controlled by analyst (adpd)
• Many types of analysis
• Analysis revised independent of the design
  version
• Analysis version is always with respect to a
  design version
• Relationship provided to associate design and
  analysis versions (advr)
• Extended Shape Representations
• AP203 Nominal Design Shape (NDS) - Design
  generated
• Idealized Analysis Shape (IAS) and Node Shape
  (NS) - Analyst generated
• NDS forms basis for IAS
• New shape extensions to AP203 -
  Constituent_Shape_Representation
• Defined to support composites
• Possibly could support non-composites attributed
  design shape extensions
• Curve with cross-section shape
• Surface with thickness (and/or associated
  attribute tables)
• Foundation for Design Intent/Analysis Review
  Communications Between Designer and Analyst
• additional_design_information (Design
  Specifications, Material Specifications, etc.)
• analysis_report_representation (Text Documents,
  Graphical Documents)

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AP209 (ARM) On-A-Page
AP203 Coverage
shape
parent_shape
constituent_part
fea_model
shape_aspect
part
geometry
ply_laminate
part_number
g_m_r
node
fe_analysis
of_part
part_version
processed_core
element
g_r
t_r
CAE
CAD
version
a_d_i
analysis
composite_assembly
a_r_r
d_d_p_d
analysis_number
design
specification
ply_piece
analysis_version
analysis
a_d_v_r
n_d_s
d_s
version
filament_laminate
d_s
a_d_p_d
X-section Shape
g_m_r
basis
filament_laminate_shape
a_b_r
analysis_shape
g_m_r
m_s_w_t
constituent_shape_representation
d_s
w_w_t
point_model
f_b_r
b_sheet_r
t_d_g_s
c_sheet_r
i_d_s
node_shape
n_t_s_a_w
d_m
d_s
shape
ply_shape
ply
g_m_r
thickness
(See Backup Information For Symbol Definitions)
p_p_s
l_p_s
f_p_p_s
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MSC.Patran Beta Version AP209 Extensions

• Geometry/Configuration Control
• Visualization Tools for Configuration Control
  Data
• Composites
• Support for Ply Laminate Tables, Zones
  (Percentage Laminate Definitions, Thickness
  Laminate Definitions Comprising Processed Cores),
  and Smeared Materials
• Visualization and Manipulation Tools for Ply
  Laminates, Zones (Percentage Laminate
  Definitions, Thickness Laminate Definitions),and
  Smeared Materials
• New Composite Tools and Database Extensions
• Zones to Properties
• Zones to Plies
• Properties to Zones
• Plies to Properties
• Etc.
• Analysis Report And Document
• Database Extensions
• Support for Association of Analysis Reports and
  Jobs
• Visualization Tools

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Alternate Representations of Composites Supported
By AP209
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Flat Pattern, 3D Plies, FEM Sample Problem
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AP203/AP209 Free Web-Based STEP Viewer

• Developed For the PDES, Inc. Engineering Analysis
  Pilot Project To Support Promotion Of AP209
  Extended PDM/CAD/CAE Data Coverage
• Beta Version 5 Available Today
• Geometry - Conformance Classes 2 and 6 Only
• PDM - Minimum Subset Of Conformance Class 1
• Mesh Nodes/Elements
• Materials/Properties (Tree Mode Only)
• Load Cases/LBCs (Tree Mode Only)
• Future Versions Will Extend Coverage
• Full Graphical Viewing and Selection of AP209
  Properties, Materials, LBCs, Results
• Additional Geometry Classes
• Access At http//simulate.engineering-e.com/demo
  (Must Register And Download Citrix Plug-in Before
  MSC.StepViewer Available)

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MSC.Software Demo Web Site For StepViewer Access
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AP209 Awareness Through Demonstrations

• (Completed/AP209 CD)
• PDES, Inc. Design-To-Analysis Phase 1 (1994)
• Ford, Boeing, Lockheed, ITI, MSC
• Auto And Composite Tank Structures
• CAD-To-CAE-To-CAE
• COTS CAD/CAE (ARIES, PATRAN, NASTRAN,
  ITI/STRESSLAB)
• Linear Static FEA
• Video Generated, PDES, Inc. TAC Demo
• DARPA MADE/IPDE Program Phase 1 (1996)
• Boeing, ASU, MSC
• Aircraft Structures
• CAD-To-CAE(CFD)-To-CAE(Structures)-To-CAE(CFD)
• COTS CAD/CAE (CATIA, PATRAN, NASTRAN)
• Boeing Proprietary CFD (AGPS/A502)
• Iterative 1st Order CFD And Linear Static FEA
• In-House Boeing Demo, PDES, Inc. Offsite
  Presentation

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AP209 Awareness Through Demonstrations (Cont.)

• (Completed/AP209 DIS) - Lockheed, Electric Boat,
  MSC
• Electric Boat Design-To-Analysis Process (1998)
• Ship Structures
• CAD-To-CAE-To-CAE-To-CAD
• COTS CAD/CAE (PRO/E, PATRAN, NASTRAN)
• Electric Boat Proprietary (COMMANDS)
• Multiple Idealized Geometric Shapes And FEM/FEA
  Models
• Linear Static And Dynamic FEA
• PDES, Inc. TAC Demo (November 1998)
• Lockheed Design/Manufacture/Analysis Composites
  Process (1999)
• Composite Aircraft Structures
• CAD/CAM-To-CAE-To-CAD/CAM
• COTS CAD/CAE (CATIA, FiberSIM, PATRAN, NASTRAN)
• Lockheed Proprietary (ASSS, PICASSO)
• Composite Structure Geometric Shapes (Ply/Zone)
  And FEM/FEA Models
• Linear Static And Dynamic FEA
• PDES, Inc. TAC Demo (June 1999)

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Backup Information
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MSC.Patran Version 9.5 AP203 Import Coverage

• Class2 Geometrically Bounded Surface Shape
  Representation
• Mapped Item
• Axis2_Placement_3d
• B_spline surface
• Rectangular Trimmed Surface
• Curve Bounded Surface
• Spherical, Toroidal Surface
• Swept Surface
• Circle, Ellipse
• Trimmed Curve
• Composite Curve
• Curve Replica, Offset Curve 3d, Offset Curve 2d,
  SeamCurve
• Surface Curve
• Boundary Curve, Outer Boundary Curve, Composite
  Curve Segment

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MSC.Patran Version 9.5 AP203 Import Coverage
(Cont.)

• Class 2 Geometrically Bounded Wireframe Shape
  Representation
• Geometric Curve Set
• Axis2_Placement_3d
• Points
• Circle
• Ellipse
• Polyline
• Trimmed curve
• Class 3 Edge Based Wireframe Shape
  Representation
• Edge Based Wireframe Model
• Axis2_Placement_3d
• Edge Curve
• Vertex Point
• Line , Circle , Ellipse, B_Spline_Curve
• Parabola, Hyperbola
• Vertex Geometry (only cartesian point supported)

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MSC.Patran Version 9.5 AP203 Import Coverage
(Cont.)

• Class 3 Shell Based Wireframe Shape
  Representation
• Shell Based Wireframe Model
• Axis2_Placement_3d
• Edge Loop
• Edge Curve
• Line, Circle, Ellipse, B_Spline_Curves
• Vertex Geometry (only cartesian point supported)
• Class 4 Manifold Surface Shape Representation
• Shell Based Surface Model
• Axis2_Placement_3d
• Open shell, Closed Shell
• Connected Face Set, Face Surface, Oriented Face
• Elementary Surfaces
• Spherical, Conical, Toroidal, Plane, Cylindrical
• Bounded Surfaces
• B_Spline_Surfaces

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MSC.Patran Version 9.5 AP203 Import Coverage
(Cont.)

• Swept Surface
• Surface of Linear Extrusion
• Edge loop
• Edge Curve
• Parabola, Hyperbola, SeamCurve
• Class 5 Faceted Brep Shape Representation
• Faceted Brep
• Axis2_Placement_3d
• Face_Surface
• Planar Surfaces
• Edge Loop
• Edge Curves
• Parabola, Hyperbola, SeamCurve
• Class 6 Advanced Brep Shape Representation
• Manifold Solid Brep
• Next Assembly Usage Occurrence

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MSC.Patran Version 9.5 AP203 Import Coverage
(Cont.)

• Mapped Item
• Axis2_Placement_3d
• Brep with voids
• Advanced Face
• Swept Surface,
• Surface of linear Extrusion
• Surface of Revolution
• Edge Loop
• Edge Curve
• Oriented Edges
• B_spline_surface_with_knots
• Rational_bspline_surface
• Cylindrical surface
• Conical Surface
• Toroidal Surface

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MSC.Patran Version 9.5 AP203 Import Coverage
(Cont.)

• Plane
• Quasi uniform surface
• Line
• Circle
• Uniform Surface
• Uniform Curve
• Ellipse
• B spline curve with knots
• Quasi uniform curve
• Rational bspline curve
• Bezier Surface and Curve
• Spherical Surface
• Parabola, Hyperbola,
• Seam Curve

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MSC.Patran Version 9.5 AP203 Export Coverage

• Curves (MSC.Patran to AP203 Geometric Entity
  Mapping)
• PieceWise_Cubic_Polynomial_Curve --
  B_spline_Curve_with _knots
• IGES_Nurb_Curve -- B_spline_Curve_with _knots
• IGES_Cubic_Spline -- B_spline_Curve_with _knots
• IGES_Arc -- Circle
• IGES_Composite_Curve -- Composite_curve
• IGES_line -- Line
• IGES_Conic_Ellipse -- Ellipse
• IGES_Conic_Hyperbola -- Hyperbola
• IGES_Conic_Parabola -- Parabola
• IGES_PieceWise_Linear -- B_spline_Curve_with
  _knots
• Rational_Bezier -- B_spline_Curve_with _knots
• Curve_On_Surface_Isometric --
  B_spline_Curve_with _knots
• Curve_On_Surface_General -- B_spline_Curve_with
  _knots
• PDA_line -- Line
• IGES_Offset_Curve -- Offset_Curve_2d_Offset_Curv
  e_3d
• CATIA_curve -- B_spline_curve_with_knots
• COMPUTER_VISION_Curve -- B_spline_curve_with_kno
  ts
• N_Dimensional_Cubic_Spline --
  B_spline_curve_with_knots

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MSC.Patran Version 9.5 AP203 Export Coverage
(Cont.)

• Surfaces (MSC.Patran to AP203 Geometric Entity
  Mapping)
• IGES_Nurb_Surface -- B_spline_surface_with_knots
  
• IGES_Trimmed_Surface -- Curve_bounded_surface(Cl
  ass II) Advanced_face ( Class VI)
• IGES_BiCubic_Patch_Network --
  B_spline_surface_with_knots
• IGES_Surface_Of_Revolution --
  Surface_Of_Revolution
• IGES_Ruled_Surface -- B_spline_surface_with_knot
  s
• IGES_tabulated_Cylinder -- Surface_Of_Linear_Ext
  rusion
• Rational_Bezier_Network -- B_spline_surface_with
  _knots
• Ordinary_Trimmed_Surface --
  Curve_Bounded_Surface
• PDA_Patch -- Plane if Class VI Or
  B_spline_surface_with_knots
• Bilinear_Coons_Surface -- B_spline_surface_with
  _knots
• IGES_Offset_Surface -- Offset_surface
• PTC_Plane -- Plane
• PTC_Cylinder -- Cylindrical_surface
• PTC_cone -- Conical_surface
• PTC_torus -- Toroidal_surface
• PTC_fillet_surface -- B_spline_surface_with_knot
  s
• PTC_generalised_Coons_Surface --
  B_spline_surface_with_knots
• CATIA_Surface -- B_spline_surface_with_knots

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MSC.Patran Version 9.5 AP203 Export Coverage
(Cont.)

• Surface_On_Solid -- B_spline_surface_with_knots
  
• Curve_Interpolating_Surface --
  B_spline_surface_with_knots
• Extruded_Surface -- Surface_of_linear_Extrusion
  
• Glide_Surface -- B_spline_surface_with_knots
• Composite_Trim_Surface -- B_spline_surface_with_
  knots
• PTC_sphere -- Spherical_surface
• Solids (MSC.Patran to AP203 Geometric Entity
  Mapping)
• ASM solids -- B-Rep
• Ordinary Brep -- B-Rep

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MSC.Patran Version 9.5 AP209 Import/Export
Coverage

• Geometry/Configuration Control
• Complete MSC.Patran AP203 geometry coverage
  provided
• Minimum subset of CC1 plus analysis/design
  version association entity
• Nodes
• Global coordinate system
• Elements
• Volume 3D
• Hexahedral elements -- HEX8, HEX9, HEX20,
  HEX21, HEX26, HEX27, HEX32HEX64
• Pentahedral elements -- WEDGE6, WEGE15
  WEDGE24
• Tetrahedral  elements -- TET4,TET10TET16
• Surface 3D
• Quadratic elements -- QUAD4,QUAD5,QUAD8,
  QUAD9,QUAD12QUAD16
•   Triangular elements -- TRI3,TRI4,TRI6TRI9 
• Curve 3D
• BAR2,BAR3BAR4 

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MSC.Patran Version 9.5 AP209 Import/Export
Coverage (Cont.)

• Materials
• Isotropic,  Orthotropic and Anisotropic 
• Element Properties
• Surface elements - Membrane Stiffness, Bending
  Stiffness, Coupling stiffness, Shear stiffness
  and thickness 
• Curve elements - Cross sectional  area, second
  moment of inertia, torsional warping constants,
  and non-structural mass. Beam cross section
  geometry and beam properties association
  maintained
• (Only Properties related to Nastran preference
  are currently supported) 
• Loads and Boundary Conditions
• Point loads - At nodal positions
• Pressure loads - Element uniform and element
  varying pressure loads are supported for loads
  applied on faces of Volume_3d_Elements and
  Surface_3d_elements
• Distributed loads - Element uniform and
  element varying  distributed loads are supported
  for loads applied on  Curve_3d_Elements
• Single point constraints - Nodal displacements
• Multi point constraints - Only explicit MPCs 
  are supported
• Support for constant value LBCs
• (Only LBCs Which are associated with at least one
  Load case are exported)

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MSC.Patran Version 9.5 AP209 Import/Export
Coverage (Cont.)

• Load Cases
• Load Cases which have at least one of the
  supported  LBCs are exported
• Output Requests 
• Support for multiple jobs 
• (Output requests are supported only for Nastran
  jobs)
• Results 
• Static analysis
• Results are supported for elemental stresses,
  strains, and nodal displacements 
• Normal modes analysis
• Modes and nodal eigenvectors
• (Support is available for  only those load cases
  which are associated with a single result sub
  case)

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AP209 ARM Entities Legend
a_d_v_r - analysis_design_version_relationship
d_d_p_d - design_discipline_product_definition
a_d_p_d - analysis_discipline_product_definitio
n g_m_r - geometric_model_representation n_d_s
- nominal_design_shape i_d_s -
idealized_design_shape f_m_p -
fea_material_property d_s - defining_shape a_b
_r - advanced_boundary_representation m_s_w_t
- manifold_surface_with_topology w_w_t -
wireframe_with_topology f_b_r -
faceted_boundary_representation n_t_s_a_w -
non_topological_surface_and_wireframe