ansys simulation basics

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Simulation Basics

Chapter Two


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Training Manual

Simulation Basics

Chapter Overview

• In this chapter, the basics of using Simulation to performanalyses will be covered, which include: – The Simulation GUI and peration

– Introduction to the Simulation !i"ard

– Basic #nalysis $rocedure

• The capabilities described in this section are generallyapplicable to the ANSYS DesignSpace Entra licenses andabove, unless e%plicitly noted with the lower&left handtable'

ANSYS License Availability(esignSpace )ntra x(esignSpace x$rofessional xStructural x*echanical+*ultiphysics x


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Simulation Basics

A. Launching Simulation

• ecall that there are two ways of running Simulation: – Configured from within #-S.S !or/bench 0

– 0 or directly from a supported C#( system

*odel shown is from a sample Solid )dge assembly'


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Simulation Basics

• The components of the user interface are shown below:

• Short descriptions of each component are covered ne%t

… Simulation Inter ace

Tree utline

(etails 1iewGraphics !indow

Toolbars

Simulation!i"ard

*enus

!or/bench Tabs


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Simulation Basics

… !"I # $enus

• The menus provide much of the functionality present inSimulation' Covering each menu item may be tedious, soonly the more commonly used menu items are coveredbelow: – The title bar lists the currently active #-S.S license

– 23ile 4 Save5 to save the 'dsdb Simulation database – 23ile 4 Clean5 to delete mesh and+or results from database

– 2)dit 4 Select #ll5 to select all current entities in the window

– 2Units5 to change units on&the&fly

– 2Tools 4 ptions0 5 to customi"e settings and options

– 26elp 4 #-S.S Simulation 6elp5 to invo/e documentation


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Simulation Basics

… !"I # %ool&ars•

There are four sets of toolbars to provide users 7uic/ accessto functionality also found in the menus'

– The toolbars can be repositioned anywhere on the top of the

Simulation window – The 2Conte%t5 toolbar, as will be illustrated later, will change,

depending on what branch is active in the 2 utline5 tree'

– Tooltips appear if the cursor is placed over the toolbar button

– # 2Unit Conversion5 toolbar is also available 8not shown9

Standard Toolbar

Graphics Toolbar

-amed Selection Toolbar

Conte%t Toolbar


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Simulation Basics

… !"I # %ool&ars

• The 2Standard5 toolbar is shown below:

• The 2Graphics5 toolbar is used very often:

– The left mouse button can be either in 2selection5 mode or2graphics manipulation5 mode' The above toolbar buttonsgrouped as 2select entities5 and 2graphics manipulation5control the left&mouse button behavior'

– The selection of entities of the C#( geometry can be doneeither by individual selection or by bo%&selection' This iscontrolled by the 2Select *ode5 icon

Save 'dsdb Bring up Simulation !i"ard Solve *odel-ew or pen 'dsdb Capture Snapshot

Graphics *anipulationSelect entities Select #d acent !ireframe3it #llSelect mode 1iewports


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Simulation Basics

… !"I # Outline %ree

• The utline Tree provides an easy way oforgani"ing the model, materials, mesh,loads, and results for the analysis – The 2*odel5 branch contains the input

data re7uired for the analysis

– The four main sections of the 2*odel5branch include 2Geometry,5 2Contact58if present9, 2*esh,5 and 2)nvironment'5

– The 2)nvironment5 branch contains theloads as well as the 2Solution5 branch,which holds results'

– ther branches 8not covered here9 arealso available'


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… !"I # Outline %ree

• The utline Tree shows icons for each branch, along with astatus symbol' )%amples of the status symbols are below: – Chec/mar/ indicates branch is fully defined+ ;

–

– 2?5 means that item is suppressed 8will not be solved9

– Transparent chec/mar/ means body or part is hidden

– Green lightning bolt indicates item is currently beingevaluated

– *inus sign means that mapped face meshing failed

Becoming familiar with the basic status symbols allows users todebug Simulation problems 7uic/ly'


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… !"I # Details 'iew •

The (etails 1iew provides a means ofinputting data' %he contents will change()epen)ing on &ranch selecte). – !hite field: shows current input data

• (ata in white te%t field is editable

– Gray 8or ed9 field: shows informative data• (ata in gray fields cannot be modified'

– .ellow field: incomplete input data• (ata in yellow fields indicates missing

information'


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… !"I # !raphics *in)ow •

The Graphics !indow shows the geometry and results' Itcan also provide wor/sheet 8tabular9 listings, the 6T*=report, and a $rint $review option'

Geometry Tab !or/sheet Tab

$rint $review Tab eport $review Tab

@ob Status Tab

The @ob Status tab provides

information on obs beingsolved remotely'

The remote solve capabilitywill be discussed in theSimulation A)vance) %rainingCourse


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… !"I # Simulation *i+ar) • The Simulation !i"ard is an optional component, a useful aid

to remind users steps re7uired to complete an analysis – The Simulation !i"ard provides a list of re7uired

steps and the status of them

– Green chec/mar/ indicates the item is complete

– Green 2i5 shows an informational item

– # greyed symbol shows that the step cannot beperformed yet

– # red 7uestion mar/ means that there is anincomplete item

– #n 2%5 means that the item is not performed yet

– # lightning bolt means that the item is ready to besolved or updated

• The Simulation !i"ard can be toggled on+off byselecting the button on the Standard Toolbar


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Simulation Basics

• !hen first attaching a model to Simulation, the Startup $anel isshown 8optionally9, allowing the user to select a SimulationTemplate'

B. Startup ,anel


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Simulation Basics

•The benefit of the Startup $anel is that the appropriateresults and Simulation !i"ard will appear – 2Stress Branch5 is selected in the e%ample below' -ote that

results and the Stress !i"ard are automatically chosen

… Startup ,anel


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… Simulation *i+ar) •

By selecting an item on the 2 e7uired Steps5 chec/list, acallout appears, illustrating how that function is performed' – In the e%ample below, 21erify *aterials5 was selected, and the

callout shows the user where this item can be changed'


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… Simulation *i+ar) •

The Simulation !i"ard is handy forusers who do not use Simulationevery day – Besides basic functionality, callouts

for more advanced items are alsoavailable as shown on right


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Simulation Basics

C. Basic ,roce)ure• The purpose of simulation is usually to determine the response of

the system based on some type of e-citation or loa)ing '

• It is crucial to remember that a mathematical mo)el is used: – CAD geometr is an ideali"ation of the ph sical mo)el

– The mesh is a mathematical representation of the C#( model

– The accuracy of answers is determined by various factors:• 6ow well the physical model is represented depends on the assumptions

• -umerical accuracy is determined by the mesh density

C#( *odel 3inite )lement *esh


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… Basic ,roce)ure• )very analysis involves four main steps:

– $reliminary (ecisions• !hat type of analysis: Static, modal, etc'A• !hat to model: $art or #ssemblyA

• !hich elements: Surface or Solid BodiesA

– $reprocessing• #ttach the model geometry• (efine and assign material properties to parts• *esh the geometry

• #pply loads and supports

• e7uest results

– Solve the *odel

– $ostprocessing• eview results• Chec/ the validity of the solution

Preprocessing

Solution

Postprocessing

PreliminaryDecisions


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Simulation Basics

… Basic ,roce)ure• # sample analysis using the Stress !i"ard will be shown in

this section'

• The !i"ards in Simulation aid the user in following thebasic analysis template discussed previously: – #ttach+import geometry

– #ssign material properties

– 8*esh geometry9• # default mesh will be supplied by Simulation if this step is not

performed manually by the user

– #pply loads and supports

– e7uest results

– Solve model

– eview results+postprocessing


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Simulation Basics

… Attach !eometr • )arlier, it was shown that geometry can be attached to

Simulation in two ways – (irect from C#( system

• 3or supported C#( pac/ages only using plug&in mode

– 3rom within a blan/ Simulation session

• 3or all supported formats, using plug&in or reader mode

#ttaches active C#( model8plug&in mode9

Browse for C#( file

8reader mode9

(irectly launchesSimulation and attachesgeometry 8plug&in mode9

*ethod > *ethod


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… Assign $aterial ,roperties• #fter importing a model, the Stress Branch template was

chosen, and the Stress !i"ard appears – 21erify *aterials5 is selected, and the callout shows how to

change material properties in the pull&down menu

#fter 21erify *aterials5 isselected, all of the partsfrom the 2Geometry5branch are highlighted,and the (etails view showshow to change thematerial'


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• -otice that the (etails 1iew allows the user to select a materialfrom a pull&down menu or to import a new material – The default material property is 2Structural Steel5 but can be

changed

– By selecting 2Import 05 the user can select a material property file8?*= format9

– Although a ew material properties are supplie) with Simulation or)emonstration purposes. "sers shoul) use their own material

propert values in pro)uction use.

… Assign $aterial ,roperties


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… Assign $aterial ,roperties• *aterials may be individually selected for each part

– *ultiple parts can be highlighted and changed at once• Use Shift&=eft mouse button to highlight all items in range

• Use Ctrl&=eft mouse button to individually add+remove selection

ANSYS License Availability(esignSpace )ntra(esignSpace x

$rofessional xStructural x*echanical+*ultiphysics x

By using a combination of Shift&=eft mouse button and Ctrl&=eftmouse button, twelve parts arehighlighted on the utline Tree

The user can then change allmaterials at once in the (etails

1iew by selecting the materialpull&down menu'

-ote that (esignSpace )ntra islimited to analysis of singleparts'


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… Assign $aterial ,roperties• *aterial properties are listed, modified, imported or e%ported by

accessing the 2)ngineering (ata5 application via the 2(ata5 iconin Simulation


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… Assign $aterial ,roperties• (efault settings for material properties can be changed in

the )ngineering (ata application – The default material can be changed from 2Structural Steel5

– # list of 23avorites5 can be saved for fre7uent access

– -ew materials can be added from various locations


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… Insert Loa)s / Supports• #fter verifying and assigning materials, the 2Insert =oads5

item is selected from the Stress !i"ard – Structural 8and thermal9 loads are applied from the pull&down

icon in the Conte%t toolbar'

#fter 2Insert =oads5 isselected, notice that the2)nvironment5 branch ishighlighted'

B highlighting the0Environment1 &ranch( theConte-t tool&ar an) Detailsview change.


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… Insert Loa)s / Supports• =oads and supports are applied on geometric entities

• There are two ways to accomplish this: – Select geometry entity in Graphics !indow first,

then select load or support from Conte%t Toolbar

– Select load or support from Conte%t Toolbar first, selectgeometry entities in Graphics !indow, then clic/ on 2#pply5in (etails 1iew'


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… Insert Loa)s / Supports• #fter assigning the load on geometric entities, the user can

enter additional data in the (etails view, if necessary' – -otice that, in the utline Tree, the associated load branch

symbol status will also change to completedD 8chec/mar/9


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… Insert Loa)s / Supports• 3or some structural loads direction is

needed: – Selection is done in (etails 1iew of load

• If 2Components5 is chosen, enter ?, ., or EComponents of loading

• If 21ector5 is chosen, select geometry andenter magnitude of loading

• (efaults can be set in 2Tools 4 ptions 04 Simulation: *iscellaneous4 =oad rientation Type5

– The !orld Coordinate System or user

defined local coordinate systems can bereferenced• User&(efined Coordinate Systems will be

discussed later


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… Insert Loa)s / Supports – )%isting geometry can be referenced to control

direction:• In the 2(etails5 view, select 2(efine By: 1ector5

• Three types of e%isting geometry can be used

– -ormal to planar face or along a%is of cylindricalface

– #long straight edge or normal to cylindrical edge – Two vertices defining vector

• Clic/ on 2(irection5 and select geometry used for vector orientation' Use the arrows in the Graphicswindow totoggle the direction'

• Clic/ on 2#pply5 when done'

• )nter magnitude for loading in 2*agnitude'5


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Simulation Basics

… $ouse Controls – The le t mouse &utton is used to select geometric entities

to manipulate the graphics display

• User can select items 8verte%, edge, surface, body9 or manipulatethe view 8rotate, pan, "oom in+out, bo% "oom9

• Select mode can be single&select or bo%&select

– In single&select mode, clic/&drag with left mousebutton to 2paint select5 multiple items

– Use Ctrl&=eft mouse button in single&select mode to select orunselect multiple entities

– In bo%&select mode, clic/&drag from left to right selects entitiesfully enclosed in bounding bo%

– In bo%&select mode, clic/&drag from right to left selects anyentity partially enclosed in bounding bo%


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… $ouse Controls – In select mode the middle mouse provides several short cuts

for graphics manipulation• Clic/&drag middle mouse button to dynamically rotate model

• Shift&*iddle mouse button pans model• If present, the wheel can be used to "oom in+out

– The right mouse button provides conte%t&sensitive pop&upmenu if clic/ed once in Graphics !indow

• Clic/&drag right mouse button to bo% "oom in area of interest

• Clic/ right mouse button once and select 23it5 to fit model in view

Single&clic/ right mousebutton provides conte%t&

sensitive pop&up menu

Clic/&drag right mouse

button allows user tobo%&"oom in region


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… Appl ing Loa)s an) Supports• By ta/ing advantage of the mouse controls, it can be

relatively easy to apply a load 8or support9 to multiple faces – In e%ample below, user can use Ctrl&left mouse button to

single&select surfaces 8highlighted in green9

– Use of middle mouse button allows user to rotate model tomore easily select certain surfaces in bac/D of model


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… Insert 2esults• By selecting the Stress Branch template in the beginning,

some results are already re7uested' 6owever, the user canre7uest other results, if needed' – By selecting 2Insert esults5 in the Stress !i"ard, the callout

shows how to add results

-ote that the 2Solution5branch is now highlighted'

Because the 2Solution5branch is selected, theConte%t toolbar and (etailsview changes'

esults, such as stress,strain, and deformation canbe re7uested from the pull&down icons on the Conte%ttoolbar' -ew result itemswill then appear under the2Solution5 branch'


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… Solving the $o)el • #fter verifying materials, applying loads and supports, and

inserting results, the model is ready to be solved' – Selection of 2Solve5 in the Stress !i"ard produces a callout

showing the user that the lightning bolt icon is used to initiatea solution

Starting the solution will includeautomatically meshing the model if ithas not been done so previously'

The solution may ta/e a few minutes toa few hours, depending on how largethe model is and the hardware used' #progress bar will be shown to indicateroughly how long the solution willta/e' The solution can also bestopped via the progress bar'


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… Solving the $o)el 3ANSYS Details4 – (uring solution an #-S.S input file is generated, and the

details of the utput 3ile can be viewed if a 2SolutionInformation5 branch has been re7uested under the 2Solution5branch

In !or/sheet view of the2Solution Information5 branch,the contents of the utput 3ilewill be updated with a fre7uencyas specified in the (etails view'

The location of the input file2ds'dat,5 output file 2solve'out,5and scratch files are located in

the system T)*$ directory bydefault'

This solver directory can bechanged under 2Tools 4

ptions0 4 Simulation: Solution4 Solver !or/ing (irectory5

#dvanced #-S.S (etails


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… 'iew 2esults• #fter the solution is complete, the user can 1iew esults

– $lot contours and vectors by highlighting the result of interest

– #nimate results via the 2#nimation5 Tab

To view results, as the calloutshows, the appropriatebranch needs to be selected'


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… 'iew 2eport • In preparation for generating the 6T*= report, one can add

figures and comments from the Standard Toolbar – Select a branch first, such as 2)7uivalent Stress5

– Then select the appropriate Standard Toolbar button:


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… 'iew 2eport • #fter adding any figures or comments, select 21iew

eport5 – $reliminary information can be entered, such as author name

– Select 2Generate eport5 to create 6T*= report

The 6T*= eport can beselected under the2Solution5 branch via2 eport $review5 tab, asthe callout indicates'


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… 'iew 2eport • The 6T*= report will be displayed in Simulation

– Comments and figures added will appear in the report

The 6T*= report generator includesall input and results associated withthe simulation, providing completedocumentation of the analysis'

This provides time&saving yetcustomi"able report that can easily begenerated by the user'


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… 'iew 2eport • eports are always ) namicall generated, so the user

needs to save the report, otherwise it will be overwritten – The report can be 2published5 as 6T*= files in a different

directory or an internal web server, emailed, or sent to*icrosoft !ord or $ower$oint

The #ppendi% at theend of the 6T*=

eport will show thelocation of thevarious files used tocreated the report'


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• !or/shop F Simulation Basics

• Goal: – Using the Stress !i"ard, set up and solve a structural model

for stress, deflection and safety factor'

D. *or5shop 6 # Simulation Basics
http://workshops/AWS100_WS_02.ppthttp://workshops/AWS100_WS_02.ppt

ansys simulation basics

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