WB1_01_DM_11_CH01_Intro

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May 11, 2007

© 2007 ANSYS, Inc. All rights reserved.

ANSYS, Inc. Proprietary

ANSYS

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Chapter 1

ANSYS Workbench and

DesignModeler

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Welcome!

• Welcome to the DesignModeler and ANSYS Workbench

Simulation training course!

•

This course is intended for all new and existing users of ANSYS analysis products.

– This course covers

• The Design Modeler module of ANSYS Workbench.

• Simulation in performing structural

•Other Workbench modules are covered in separate classes.

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Course Objectives

• To teach the use of DesignModeler in the following areas:

– General understanding of the user interface

–

Procedure for creating sketches and assigning dimensions – Procedure for creating and modifying 3D geometry

– Working with imported CAD geometries and using 3D operations to

extract fluid regions from solid parts

– Parametric modeling

• To teach the basics of using Simulation in the following areas:

– General understanding of the user interface, as related to geometry

import, meshing, application of loads and supports, andpostprocessing

– Procedure for performing FEA simulations, including linear static,

modal, and harmonic structural analyses and nonlinear steady-state

thermal analyses

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A. About ANSYS, Inc.

ANSYS, Inc.

• Developer of ANSYS family of products

• Global Headquarters in Canonsburg, PA - USA (south of Pittsburgh)

– Development and sales offices in U.S. and around the world

– Publicly traded on NASDAQ stock exchange under “ANSS”

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… ANSYS Family of Products

ANSYS, Inc. Family of Products include the

following:

• ANSYS – Advanced nonlinear mechanical

and multiphysics FEA solution capabilities• ANSYS Workbench – Complete environment

for geometry modeling, mesh manipulation,

structural/thermal analysis, and optimization,

which is tightly integrated with CAD packages

•CFX – State-of-the-art CFD solvers,

including the coupled, parallel CFX-5 solver

• ICEM CFD – Powerful meshing tools withgeneral pre- and post-processing features,

including ICEM CFD for generating complex

CFD grids and AI*Environment for creating

with sophisticated structural FEA meshes

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B. ANSYS Workbench Overview

• What is ANSYS Workbench?

– ANSYS Workbench is a new-generation solution from ANSYS that provides

powerful methods for interacting with the various ANSYS solvers. This

environment provides a unique integration with CAD systems, and your design

process, enabling the best CAE results.

• Workbench Technology Strengths:

• Reliable geometry importing capabilities.

• Robust meshing capabilities.

• Integrated tools.

• Bi-directional CAD associativity.

• Parameter management driving DOE optimization and variational technology.

• Customizable for industry or company specific solutions

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ANSYS Workbench Overview

• ANSYS Workbench comprises the following modules:

– Simulation for performing structural and thermal analyses using the ANSYS solver

–

Meshing for generating a mesh for Mechanical, Electromagnetic or CFD application

– DesignModeler for creating and modifying CAD geometry to prepare the solid model

for use in Simulation or Meshing

– DesignXplorer and DesignXplorer VT for investigating the effect of variations input

to the response of the system

– FE Modeler for translating a Nastran mesh for use in ANSYS

– Advanced CFD for performing CFD analyses using the CFX Solver

– Advanced Meshing for generating complex CFD grids and sophisticated structural

FEA meshes using full ICEM CFD version

– AUTODYN for modeling nonlinear dynamics of solids, fluids, gas and their

interaction

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… Product Configuration

•Types of licenses available for Simulation:

– ANSYS DesignSpace Entra

•All DesignSpace capabilities but for parts only.

– ANSYS DesignSpace

• Structural capabilities are linear static, modal, and buckling analyses of

assemblies. Thermal and shape optimization included.

– ANSYS Professional

• Linear structural (including harmonic) and thermal analyses

– ANSYS Structural

•All structural capabilities, including linear and nonlinear

– ANSYS Mechanical (including ANSYS Multiphysics)•All structural and thermal capabilities

– (Other ANSYS licenses are supported for meshing only)

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ANSYS Workbench Overview

Meshing/CFX-Mesh

Advanced CFD

DesignXplorer (VT)

FE Modeler

Advanced Meshing

Simulation

DesignModeler

ANSYS Workbench

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… Simulation Overview

•Analysis types available in Simulation:†

– Structural (static and transient):

• Linear Stress, Nonlinear Structural to account for

large deflection effects, plasticity and contactnonlinearities.

– Heat Transfer (steady state and transient):

• Solve for temperature field and heat

flux. Temperature-dependentconductivity and convection

allowed. Thermal-stress analysis

supported as well.

– Shape Optimization:• Indicates areas of possible volume reduction

based on load paths through the part using

Topological Optimization technology.

†

The list here reflects analysis capabilities possible within the Simulation GUI.Note, however, that the ANSYS license used dictates what functionality is available to the user.

Not all features listed are covered in this Introductory course.

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– Modal:• Determines natural frequencies of a system

(free vibration), includingthe effects of loading on a pre-stressedstructure.

–

Harmonic:• Determines structural response of system

under sinusoidal excitation as a function of frequency.

– Linear Buckling:• Determines failure load or safety

factor for buckling and its buckling

mode shapes.

– Dynamics:• Flexible Dynamics to study the

effects of time varying loads on a structure.

• Rigid Dynamics to determine the dynamic

response of an assembly of rigid bodies linkedby joints and springs.

• Random Vibration Analysis to study theresponse of a structure to vibration loads

that are random in nature – Magnetostatic:

• To perform 3-D static magnetic field analysis

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• Although the Simulation GUI will be discussed in detail, it is useful to note that it is Tree-Driven:

Depending on what is

highlighted on the OutlineTree, the available options

in the Context Toolbar and

Details View will change.

The Graphics Window will

also update to reflect the

part of the branch selected.

The Tree represents the

different aspects of the

simulation.

All Workbench modules are

Tree-Driven, so navigationthrough the GUI is done

through selecting different

branches of the “Tree.”

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•The user can also accessregular ANSYS functionalitynot directly accessible withinSimulation

– Command objects allow usersto stay in the Simulationenvironment but accessadvanced features via ANSYSAPDL.

– The information, stored in a“branch”, can beparameterized and is reusedfor each analysis.

– The mesh and loads can be

transferred to regular ANSYSfor further modeling.

Both of the above topics areaddressed in the Simulation

Advanced Training Notes

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… Product Configuration

•Supported Operating Systems:

– 32-bit MS Windows 2000, XP Home, XP Professional

– 64-bit MS Windows XP

– 64-bit SUN Solaris 8

– 64-bit HP HP-UX B.11.0

•FlexLM network licensing used for all ANSYS and ANSYSWorkbench products

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• Launching ANSYS DesignModeler:

– Workbench modules are all launched

from one icon

– “ Start Menu > Programs > ANSYS 11.0 > ANSYS Workbench ”

– Users can launch Workbench from

within a supported CAD system

The ANSYS Start Page

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The ANSYS Start Page

• After launching ANSYS Workbench, the StartPage displays what options

are available to the user:Launch a new, empty DesignModeler session

Select

“DesignModeler

Geometry” tobrowse for an

existing *.agdb file

Alternatively you can choose to start an

“Empty Project” to set up a wbdb file.

Change default settings

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Options Page

• Before entering DesignModeler, the current and default options

may be chosen through the “Options …” button

– Preferences for all Workbench modules can be controlled through

this dialog box for setting• working units,

• modifying the graphics style etc.

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Workbench Databases

• There are various types of files used by Workbench, each differentiated by the file

extension:

– .wbdb: Workbench Project database, which keeps track of all of the different types of

Workbench databases in a “Project”

– .agdb: DesignModeler database, containing geometry data for use with Simulation or CFX-

Mesh

– .cmdb: Meshing database, containing the mesh settings and mesh information

– .dxdb: DesignXplorer/DesignXplorer VT database, which investigate relationships between

input and output parameters

– .dsdb: Simulation database, which has all the information necessary to perform a

structural or thermal analysis in Simulation

– .fedb: FE Modeler database, which has mesh information from a Nastran or Simulation

model, used to convert to ANSYS

– .eddb: Engineering Data database file. Containing all material, convection, load history

and other pertinent project information. This file is saved automatically whenever .wbdb

file is saved. (Simulation and DX databases utilize engineering data)

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Workbench Databases

• The Workbench database is simply a ‘directory’ of a “Project.” A

“Project” can be thought of as a collection of different CAD or

Workbench files, which are associated together.

• Whenever a DesignModeler database (.agdb) or a Meshing database

(*.cmdb) is created, there will be an associated Workbench database

(.wbdb) generated as well.

•

Saving the Workbench database is not required, but it is helpful inkeeping track of various analyses, especially if multiple geometries are

analyzed. Also .eddb and .param files will be saved automatically while

saving Workbench databases.

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The ANSYS Project Page

Once a new DMsession is started

the Project page

offers various

geometry tasks

and options (seenext page)

• If the Workbench “Project” tab is selected, the various Workbench

databases and CAD geometries will be listed

– The menu on right is context-sensitive. Depending on the file selected,

options available will differ

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Project Page Geometry Options

• Default options:

– CAD body type import filter

– Parameter and attribute import from CAD

– Named selection and material property

import (from supported CAD)

• Advanced options:

– CAD associativity

– Reader mode save . . . (Unigraphics specific)

– Smart CAD update allows fast update from

CAD when some parts in a CAD assemblyremain unmodified during refresh

– Temporary file for large CAD model import

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Interoperability

• Take DesignModeler database directly to Meshing, Simulation or

Advanced Meshing.

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Navigating Between Modules

• The topmost tabs allow users to navigate between opened Workbench

modules

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Exiting Workbench

• When exiting Workbench, the user will be prompted to save any files that

have changed since the last save

In this example on the left, the highlighted

Workbench database, DesignXplorer study,

and DesignModeler geometry have changed

since the last save, so the user is prompted

to save all or none of the highlighted items.If individual files are to be saved, this can be

done within the appropriate Workbench

module.

Changes to CAD geometry are not controlled

within Workbench but through the CAD

software.

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