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L9-1 ANSYS, Inc. Proprietary

© 2010 ANSYS, Inc. All rights reserved.Release 13.0

November 2010

Introduction to ANSYSMechanical

Customer Training Material

Lecture 9

CAD & Parameters

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Introduction to ANSYS Mechanical



November 2010

Customer Training MaterialChapter Overview

• In this chapter, interoperability with CAD software as well as

parameters will be discussed.

A. CAD Interoperability

B. Defining Parameters in Workbench

C. Using the Parameter Workspace

D. Updating CAD Parameters

E. Workshop 9-1

• The capabilities described in this section are generally applicable to

all ANSYS licenses. However, some CAD functionality are specific

to certain CAD software, so these will be designated accordingly.

– Not all CAD software have the same features, so there are somedifferences in CAD-related functionality which is supported in

Mechanical.

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November 2010

Customer Training MaterialA. CAD Interoperability

• Numerous Geometry Interfaces are available for commercial CAD

systems:

– For the latest information on CAD geometry interfaces and supported

platforms see the ANSYS Workbench Mechanical documentation.

• Geometry Interface licenses can be run in reader mode for all licenses.

• Geometry Interfaces can be run in plug-in mode for the CAD software listed

under “Associative”.

• DesignModeler is the Workbench geometry application and supports all the

functions and capabilities listed for commercial CAD systems.

• Please note, not al l impo rt capabi l i t ies descr ibed here are avai lable with al l

CAD systems. Features depend on CAD capabi l i t ies and the sup po rt

provided through the CAD vendor’s API.

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November 2010

Customer Training Material… CAD Interoperability

• There are various items that can be

imported from supported CAD systems:

– Geometry, Spot welds, Parameters,

Material properties, etc.

• To access these import preferences use

the Geometry properties in the Project

schematic.

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November 2010


• Import solid, surface, or line bodies:

– Assemblies with mixed solids and surfaces areOK.

– Select desired geometry type to filter import.

– Cannot import a part with mixed solids andsurfaces.

• Use Associativity:

– Allows updating CAD geometry in Mechanicalwithout redefining material properties, loads,supports, etc..

• Smart CAD Update:

– only modified components of a CAD assembly are

updated.

• Local Coordinate systems:

– Allows local CS from CAD models to import withgeometry. See current documentation for CADsystem support.

… Geometry Import

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November 2010

Customer Training Material… Named Selections Import

• If “groups” are defined in the CAD

package they can be imported as NamedSelections:

– “Groups” containing the specified prefix

in their name are imported in the Named

Selection branch (default is “NS”).

– To import all groups leave the namedselection key field blank.

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November 2010

Customer Training Material… Parameter Import

• Parametric CAD dimensions can be

imported into Mechanical:

– When checked, CAD parameter names

containing the parameter key will be

imported into Mechanical.

– To import all parameters leave the

parameter key field blank. – CAD parameters will appear in the Details

view for the part.

– Note: CAD parameters are “read only” atthis point.

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November 2010

Customer Training MaterialB. Defining Parameters in Workbench

• Input and output parameters are defined in

Mechanical by toggling the parameter flag on/off.

• Click in the square and a blue “P” will appear,

indicating that this quantity can now be manipulated

as a parameter.

• Material properties are parameterized in the

engineering data application.

Example of output parameters

Example of input parameters

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November 2010

Customer Training MaterialC. Using the Parameter Workspace

• Workbench Mechanical uses the Parameter Workspace to manage

parametric data from analysis and geometry sources.• Derived parameters and constants can be created and managed as

well.

Double click or “RMB > Edit” the

“Parameter Set” to access

parameters.

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November 2010

Customer Training Material. . . Using the Parameter Workspace

• Parameter information is presented in a series of tables.

– Outline: lists all input, output or derived parameters.

– Property: lists information regarding the parameter highlighted in the

outline.

Table of Design Points: allows multipleparameter configurations to be

prepared before solving

Outline

Table of DP

Properties

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November 2010


• Example using design points: A CAD

dimension has been promoted to a WB

input parameter.

• The stress in a particular region of the model is

promoted as an output parameter.

• The mass of the geometry has also been

promoted to a parametric output.

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November 2010


Example . . .

• Opening the parameter

workspace, the parameters can beseen in the outline.

• In the table of design points 3

new values are added to the

current CAD parameter value.

• From the top menu “Update

All Design Points” is

selected.

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November 2010


Example . . .

• The progress of the updates is

reflected in the table.

• With updates complete variouscharts can be created to investigatethe data.

Stress vs Fillet

Radius

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November 2010

Customer Training Material… Using the Parameter Workspace

• Additional processing in the parameter workspace:

• Parameter Parallel Chart shows configuration of all parameters per DP

Vertical (Y) lines

represent parameters

(P1, P2, etc.).

Horizontal, colored lines

represent design points.

DP3

DP0

DP2

DP1

Each XY intersection provides a snapshot of all

parameters for a particular DP

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November 2010

Customer Training Material… Using the Parameter Workspace

• By highlighting parameters, different chart configurations can be selected.

With P1 highlighted notice the chart options

are with respect to this parameter.

After selecting (double click) the desired

chart, the outline can be configured for

display.

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November 2010


• As charts are created they are stored in

the outline window and can be retrieved

by highlighting them.

• Using a RMB in various areas of the

chart users can “Edit Properties . . .” tocontrol colors, styles, symbols,

interpolation type, etc.

• Legend, line display, background, etc..

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November 2010

Customer Training MaterialD. Updating CAD Parameters (From CAD)

• Update From CAD (Project Schematic):

–

After modifying the CAD geometry you will need to RMB and “UpdateFrom CAD”. This will update the Mechanical geometry to match the CAD

system.

– Doing an “Update”, causes new geometry to be remeshed in Mechanical.

• Note, you can simply “Generate” the mesh in Mechanical as well.

• To allow bi-directional parametric

exchange the CAD parameters must be

promoted.

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November 2010

Customer Training Material. . . Updating CAD Parameters (From Workbench)

• With CAD parameters promoted, they can be managed in the Parameter

Set section of Workbench.

• Values modified, description added, expression entered, etc..

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November 2010

Customer Training Material. . . Updating CAD Parameters (From Workbench)

• If CAD Parameter Changes are made in WB:

• Refresh Project: causes CAD and Mechanical geometry

to update but does not re-mesh the FE model.

• Update Project: CAD and Mechanical models update

and the FE model is re-meshed.

• Notes on geometry updates:

– The magnitude of loads remain constant:

• Thus if pressure was applied on a surface and the surface area changes, the

pressure value remains the same but the total force applied will change.

– The orientation of loads will not change:

• If a load direction is specified using existing geometry, the direction of the

load wi l l not change if the geometry changes.

I d i ANSYS M h i l

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L9 21 ANSYS, Inc. Proprietary Release 13.0


• Workshop 9.1 – Parameter Management

• Goal:Use the Workbench Parameter Workspace to setup multiple scenarios to

explore structural responses in the bracket shown. Material thickness

will be varied in the gusset with the bracket thickness held constant

then the process will be reversed.

E. Workshop 9.1 – Parameter Management
http://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_09.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_09.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_09.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_09.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_09.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_09.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_09.1.ppt

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Mech-Intro 13.0 L09 CAD