STEP Support For Design And Analysis Processes

PDES, Inc./NASA STEP Tutorial Session

NASA Jet Propulsion Laboratory

January 16, 2001

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

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

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))

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?PDM

CAD CAE

AP209

Significantly Extended Source Of Enterprise Wide Data

• 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

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)

g_m_r

a_d_v_r

part_version

part

d_d_p_d

a_d_p_d

analysis_version

analysis

n_d_s

i_d_s

g_m_r

shape_aspect

shape

g_m_r

analysis_shape

node_shape

point_model

g_m_r

fea_model

node

element

fe_analysis

CAECAD

parent_shape

geometry

part_number

version

design

d_sversion

analysis_number

analysis

basis

d_s

d_s

m_s_w_t

a_b_r

f_b_r

n_t_s_a_w

w_w_t

c_sheet_r

d_mply_shape

b_sheet_r t_d_g_s

constituent_shape_representation

constituent_part

of_part

p_p_s l_p_s f_p_p_s

ply_piece

ply

thickness

ply_laminate

processed_core

composite_assembly

filament_laminate

filament_laminate_shape

shape

X-section Shape

g_r

a_r_r

t_r

d_s

a_d_i

specification

AP203 Coverage

AP209 (ARM) On-A-Page

(See Backup Information For Symbol Definitions)

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

Geometry(surface + boundary)

Geometry(surface + boundary)

Mesh

* Multiple laminate materials* Orientation w.r.t. reference(element edge, coordinate system, vector)

Layer, Material, Thickness, Orientation1, UD 0.25 0 degrees2, woven 0.4 45 degrees3, core 10.5 0 degreesetc.

* Ply layup sequence* Ply shape & fiber orientation may vary

Ply, Material, Nominal Thickness1, UD 0.25 2, woven 0.43, core 10.5etc.

Plies Zones Properties

NB: Elements may follow ply boundaries for detailed analysis

* Thickness Laminate Table* Percentage Laminate Table* Smeared Material

Alternate Representations of Composites Supported By AP209

Flat Pattern, 3D Plies, FEM Sample Problem

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)

MSC.Software Demo Web Site For StepViewer Access

AP209 Awareness Through DemonstrationsAP209 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

AP209 Awareness Through Demonstrations (Cont.)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)

Backup Information

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

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)

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

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

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

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

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_Curve_3d• CATIA_curve -- B_spline_curve_with_knots• COMPUTER_VISION_Curve -- B_spline_curve_with_knots• N_Dimensional_Cubic_Spline -- B_spline_curve_with_knots• Plane_Project_Curve_Normal -- B_spline_Curve_with _knots• Plane_Project_Curve_Vector -- B_spline_Curve_with _knots

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(Class 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_knots• IGES_tabulated_Cylinder -- Surface_Of_Linear_Extrusion• 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_knots• PTC_generalised_Coons_Surface -- B_spline_surface_with_knots• CATIA_Surface -- B_spline_surface_with_knots• PieceWise_Rational_Polynomial_Surface -- B_spline_surface_with_knots

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

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, HEX32&HEX64

Pentahedral elements -- WEDGE6, WEGE15 & WEDGE24

Tetrahedral  elements -- TET4,TET10&TET16

• Surface 3D

Quadratic elements -- QUAD4,QUAD5,QUAD8, QUAD9,QUAD12&QUAD16

  Triangular elements -- TRI3,TRI4,TRI6&TRI9 

• Curve 3D

BAR2,BAR3&BAR4 

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)

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)

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_definition

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

ply_p_s - ply_piece_shape

p_o_a - ply_orientation_angle

p_s_m - ply_stock_material

p_l_s - ply_laminate_shape

ply_l_t - ply_laminate_table

p_l_s_d - ply_laminate_sequence_definition

p_p_s - projected_ply_shape

l_p_s - laid_ply_shape

f_p_p_s - flat_pattern_ply_shape

part_l_t - part_laminate_table

c_sheet_r - composite_sheet_representation

c_a_s - composite_assembly_shape

c_a_t - composite_assembly_table

c_a_s_d -composite_assembly_sequence_definition

z_s_m - zone_structural_makeup

%_l_t - percentage_laminate_table

t_l_t - thickness_laminate_table

%_ply - percentage_ply

z_s_m_s_r -zone_structural_makeup_shape_representation

e_z_s - edge_zone_shape

p_z_s - point_zone_shape

d_m - defining_model

b_c_z - boundary_curve_zonest_d_g_s - three_d_geometry_set

b_sheet_r - beveled_sheet_representation

c_s_s_s - cross_section_shape_selection