ANSYS Fundamentals 1 This document contains no technical data subject to the EAR or the ITAR.

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ANSYS

ANSYS Fundamentals

This document contains no technical data subject to the EAR or the ITAR.

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ANSYSHow to Start Ansys and Product Launcher

Start > Programs > ANSYS > Interactive

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Job name text box

License Type:

File Management Tab

Working Directory text box

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This page contains no technical data subject to the EAR or the ITAR.

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ANSYSProduct Launcher - Configuration

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Manual memory settings

Graphic device hardware acceleration

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ANSYSGUI

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Output Window

Utility Menu

Graphics Area

Main Menu

Input Line

Current Settings

Raise/Hidden Icon

User Prompt Info

Model Control Toolbar

Contact Manager Icon

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Note: Closing the output window will end the ANSYS session!


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ANSYSGUI

Dialog boxes may have both Apply and OK buttons.

• Apply performs the action, but does not close the dialog box for repeated use.

• OK performs the action and closes the dialog box.

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ANSYSFiles

SAVE command: copies the database from memory to a file called the database file (or db file).

Utility Menu > File > Save as Jobname.dbUtility Menu > File > Save as…

RESUME command: restore the database from the db file back into memory

Utility Menu > File > Resume Jobname.dbUtility Menu > File > Resume from…

ANSYS database: all data ANSYS keeps in memory as model is build, solved, and postprocessed.


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ANSYSFiles

Erasing everything in memoryTo reset ANSYS and start a new database select :

Utility Menu > File > Clear & Start New

Or use the /CLEAR command.

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ANSYSOnline Help

To start the help system use one of the following options:• Launcher > Product Help• Utility Menu > Help > Help Topics• Any dialog box > Help• Type HELP,name in the Input Window. Name is a command or element name.

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ANSYSOnline Help

• Type HELP, PLANE42 for help on structural plane element


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ANSYSPlotting

To display entities on the graphic area and visualize the model.

Util Menu > Plot

Plot keypoints123

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Plot Lines

Plot Areas

Plot Volumes

Plot Nodes

Plot Elements

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ANSYSPractice 1

Practice 1 will show how to:• Lunch Ansys• Load a db file• Navigate the menu• Call the help system• Plot geometric entities: lines, areas, volumes

Instructions found in Practice-1.pptx


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ANSYSSelect Logic

Select Logic allows selection of a subset of entities and operate only on those entities.

Three step process:• Subset selected• Operation performed on subset• Full set reactivated

Util Menu > Select > Entities

Type of entity to select

Selection criteria

Type of selection

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ANSYSSelect Logic

Selection types:• From Full: selects a subset from the full set of entities.

• Reselect: selects (again) a subset from the current subset.

• Also Select: adds another subset to the current subset.

• Unselect: deactivates a portion of the current subset.

• Invert: toggles the active and inactive subsets.

• Select None: deactivates the full set of entities.

• Select All: reactivates the full set of entities.

Select None

Invert

Select All

Reselect

Also Select

Unselect

From Full


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ANSYSComponents

• Components are user-named subsets of entities.• The name can then be used in dialog boxes or as arguments to commands.• A group of nodes, or elements, or keypoints, or lines, or areas, or volumes can be defined as a component.

• Only one entity type is associated with a component.• Components can be selected or unselected. When you select a component, you are actually selecting all of the entities in that component.

• Component Manager can be accessed from: Util Menu > Select > Component Manager


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ANSYSPicking

Picking existing entities to perform an operation.Picker window allows to enter entity numbers directly.All entities can be picked with the Pick All button.

Mouse button assignments for picking:• Left mouse button picks (or unpicks) the entity or location closest to the mouse pointer. Pressing and dragging allows you to “preview” the item being picked (or unpicked).

• Middle mouse button does an Apply. Saves the time required to move the mouse over to the Picker and press the Apply button. Use Shift-Right button on a two-button mouse.

• Right mouse button toggles between pick and unpick mode.


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ANSYSPicking

Pick hotspot locations:• Areas and Volumes have a hotspot near the centroid of the solid model entity.

• Lines have three hotspots - one in the middle and one near each end.

• When you are required to “pick” an entity, you must pick on the hotspot.


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ANSYSWork Plane

• Working Plane - a movable, 2-D reference plane used to locate keypoints.

• Default position of the WP origin is the global origin. It can be moved or rotated as needed.

• WP defined by the XY plane. WP is infinite.

• To position the WP use Util Menu > WorkPlane > Offset WP by Increments

Translate

Rotate


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ANSYSCoordinate Systems

Types of Coordinate systems: • Global and local coordinate systems: used to locate geometry entities(nodes,

keypoints, etc.) • Display coordinate system: determines the system in which geometry items are

listed or displayed.• The nodal coordinate system: defines the degree of freedom directions at each

node.• The element coordinate system: determines the orientation of material

properties.• The results coordinate system: used to transform nodal or element results data

to a particular coordinate system for listings, displays, or general postprocessing.


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Global Coordinate System• The global reference system for the model.• Can be se to Cartesian (csys,0), cylindrical (csys,1), or spherical (csys,2).• Global coordinate systems can not be changes are always available.• To change the coordinate system use the command csys,”coordinate id”

csys,0 csys,1 csys,2


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Local Coordinate System• A user-defined coordinate system at a specified location. Coordinate system ID should be 11 or greater.

• Several ways to define:1. At WorkPlane origin2. At specified coordinates3. At existing keypoints or nodes4. Can be Cartesian, cylindrical, or spherical.5. Can be rotated about X, Y, Z axes.

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Y

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YX

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CSYS,11CSYS,0

CSYS,12


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ANSYSPractice 2

Practice 2 will show how to:• Pick entities• Manipulate the WorkPlane• Define an manipulate Coordinate systems• Perform Selections• Component creation



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ANSYSSolid Modeling

Solid Modeling: the process of creating solid models.

Definitions:• A solid model is defined by volumes, areas, lines, and keypoints.• Volumes are bounded by areas, areas by lines, and lines by keypoints.• Hierarchy of entities: from low to high:

Lower Higher• keypoints < lines < areas < volumes • Cannot delete/remove an entity that belongs to a higher-order entity.

VolumeArea Line Keypoint


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ANSYSGeometry Creation

• Top Down: Using Boolean operations with volumes (or areas) create the final shape.

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V2

V1 – V2


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ANSYSGeometry Creation

• Bottom Up: starts with keypoints, from which shapes are “build up”

Kepoints Lines Area


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ANSYSElement Type Definition

Main Menu > Preprocessor > Add/Edit/Delete >

Click to show Element types available

Select element type

Select element shape

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ANSYSMaterial Properties Definition

Main Menu > Preprocessor > Material Models

Click to Material Model number

Select Structural (linear/nonlinear/etc)

Select isotropic

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Enter properties4

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ANSYSMeshing

Main Menu > Preprocessor > Meshing > Mesh Tool

The mesh tool consists of a collections of commands required to generate a mesh.

Smart Size Controls

Local Size Controls

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Attributes Controls

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ANSYSMeshing


To assign predefined element type, real constants, material, sections, Select Element Attributes drop down menu.

Select Type to apply to the area3

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From the options select geometric entity to apply the attribute.

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Select Material to apply to the area4

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Select OK to apply attribute5

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Select Set2

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ANSYSMeshing


To assign size controls select entity

Select lines to apply size control

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Select the Set button next to Lines label

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Specify number of divisions

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Select OK to apply size control

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ANSYSMeshing (mapped)


To apply mesh controls select entity from drop down menu

Select mapped mesh

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Select Area option

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Select area to mesh

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Resulting mesh

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ANSYSMeshing (free)


To apply mesh controls select entity from drop down menu

Select free mesh

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Select Area option

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Select area to mesh

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Resulting mesh

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ANSYSLoads (Force)

Main Menu > Preprocessor > Loads > Define Loads > Apply > Structural > Force/Moment > On Nodes

Select nodes to apply the forces

Specify force magnitude

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Select force direction

2Select OK to apply force

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Resulting applied forces

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ANSYSLoads (Displacement)

Main Menu > Preprocessor > Loads > Define Loads > Apply > Structural > Displacements > On Nodes

Select nodes to apply the displacement

Specify displacement value

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Select DOF to specify

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Select OK to apply displacement

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Resulting applied displacements

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ANSYSSolution

Main Menu > Solution > Analysis Type > New Analysis

Click Static1

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ANSYSSolution

Main Menu > Solution > Solve > Current LS

Click OK to start solution.1

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ANSYSGeneral Postprocessor

Main Menu > General Postprocessor > Read Results > First Set

Click on Displacement vector sum1

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Main Menu > General Postprocessor > Plot Results > Contour Plot > Nodal Solution


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ANSYSPractice 3

Practice 3 will show how to:• Define geometry• Define element types• Define material properties• Define boundary conditions• Define loads• Solve the model• Review results



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ANSYSPractice 4

Practice 4 will show how to:• Use axisymmetric PLANE42 element for stress analysis of

a turbine disk



ANSYS Fundamentals 1 This document contains no technical data subject to the EAR or the ITAR.

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Transcript of ANSYS Fundamentals 1 This document contains no technical data subject to the EAR or the ITAR.