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14.0Release

IntroductiontoANSYS

MechanicalPart2

Workshop3

RemoteBoundaryConditions

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GoalsThegoalofthisworkshopistoanalyzethebaseofthejackassemblyshownhere.

Ourassumptionisthemechanismhasbeenprovenalreadysowechoosetonot

includetheadditionalpartsandmodelonlythebase.

Theweightofavehiclewillbesimulatedusingapointmass.

Wellassume

there

are

lateral

loads

acting

on

the

jack

as

well

which

will

be

appliedusingaremoteforce.

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GoalsSincewewontbemodelingtheentireassembly,weneedtoknowthelocation

wherethejackwillbecontactingthevehicle. Weassumethistobethecentroid

ofthetopmemberofthejackassembly.

Centroid=(2,247,0)

247mm

AnalysisModel

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ProjectSchematicBeginanewWorkbenchsessionand,fromtheProject

page,chooseRestoreArchive...andbrowsetothe

fileWS3_Remote_BC.wbpzandOpen(location

providedbyinstructor).

Whenprompted,Saveusingthedefaultnameinthesamelocationasthearchivefile.

FromtheUnitsmenuverify:

ProjectunitsaresettoMetric(kg,mm,s,C,mA,N,mV).

DisplayValuesinProjectUnitsischecked(on).

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...ProjectSchematic

1. FromtheStaticStructuralsystemdoubleclick

(orRMB>Edit)theModelcell.

2. WhenMechanicalopens,verifytheunitsare

set

to

Metric

(mm,

kg,

s,

mV,

mA).

2.

1.

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PreprocessingWhenMechanicalopenswewillhaveonlythebasepart. Sincewellbeusingremoteconditionsaswellasapointmassallatthesamelocation,itmakes

sensetousearemotepointasareference.

Note,theuseofaremotepointmeansmultipleconditionsatthesameloction

(likepoint

masses,

remote

loads,

etc.),

can

all

reference

that

location

without

duplicatingtheconstraintequationsusedtoapplythem.

1. HighlighttheModelbranchinthetree.

2. Selectthe

8split

faces

shown

here,

RMB

>Insert

>Remote

Point.

3.

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...Preprocessing4. Highlighttheremotepoint,RMB>Rename:Load

Point.

5. IntheRemotePointdetailsenterthelocation:

X

=

2 Y=247

Z=0

Assaidearlier,thislocationrepresentsthecentroidof

thetoppadofthejackwherethevehiclewillmake

contactwhen

it

is

lifted.

5.

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...Preprocessing

6. HighlighttheGeometrybranch.

7. RMB>Insert>PointMass.

8. InthepointmassdetailschangetheScopingMethodtoRemotePoint.

9. IntheRemotePointsfieldchooseLoadPointfromthelist.

10. Enteramass

of

350

kg

in

the

details.

6.

8.

9.7.

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...Preprocessing

10. HighlighttheStaticStructuralbranch,RMB>Insert>RemoteForce.

11. InthedetailschangetheScopingMethodtoRemotePoint.

12. SelectLoadPointfromthedropdownlistof

remotepoints.

13. In

the

details

enter

the

following

loads: XComponent=2

YComponent=0

ZComponent=4

11.

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...Preprocessing12. Highlight

the

bottom

face

of

the

part,

RMB

>Insert>FixedSupport.

13. HighlighttheStaticStructuralbranch,RMB>Insert>StandardEarthGravity.

14. SpecifyYdirectionforgravity.

1.

1.

1.

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Postprocessing

Solvethemodel.

Whenthesolutioniscompletevariousdisplacementplotscanbeusedtoverify

theloading.

Inthisworkshopweveshownhowremoteboundaryconditionscanbeusedto

simplifythegeometrymodelmakingforamoreefficientsolution.